drm/i915/sideband: convert to using new struct drm_device logging macros

Replace the use of printk based debugging macros with the struct
drm_device based logging macros in i915/intel_sideband.c.

Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ae253ecf3ca878fae7f1f246d75c2136fb6bd72c.1578409433.git.wambui.karugax@gmail.com

drm/i915/lmem: use new struct drm_device based logging macros.

Replace instances of printk based logging macros with the new
struct drm_device logging macros in i915/intel_region_lmem.c.

Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/7f3df2575ab41a052b7beea86ecc5385edf6f6da.1578409433.git.wambui.karugax@gmail.com

drm/i915/pm: use new struct drm_device logging macros.

This converts various instances of the struct device and printk based
logging macros with the new struct drm_device based logging macros in
i915/intel_pm.c

Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8721848f7bcf8b0c3a33969d07e331bb372bd51a.1578409433.git.wambui.karugax@gmail.com

drm/i915/pch: convert to using the drm_dbg_kms() macro.

Convert the use of the DRM_DEBUG_KMS() logging macro to the new struct
drm_device based drm_dbg_kms() logging macro in i915/intel_pch.c.

Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b79ee0f6efbf8358cbb4f2e163fa6b5bb04db794.1578409433.git.wambui.karugax@gmail.com

drm/i915/gtt: add missing include file asm/smp.h

Fix build error:
drivers/gpu/drm/i915/gt/intel_ggtt.c: In function ggtt_restore_mappings:
drivers/gpu/drm/i915/gt/intel_ggtt.c:1239:3: error:
implicit declaration of function wbinvd_on_all_cpus; did you mean wrmsr_on_cpus? [-Werror=implicit-function-declaration]
   wbinvd_on_all_cpus();
      ^~~~~~~~~~~~~~~~~~
         wrmsr_on_cpus

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200109012303.153001-1-chenzhou10@huawei.com

drm/i915: Pass cpu_transcoder to assert_pipe_disabled() always

I missed a few assert_pipe_disabled() cases when changing it to
take enum transcoder instead of enum pipe, making sparse unhappy.
Convert the leftovers.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108145616.7349-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drm/i915: Fix MST disable sequence

When moving the pipe disable & co. function calls from
haswell_crtc_disable() into the encoder .post_disable() hooks I
neglected to account for the MST vs. DDI interactions properly.
This now leads us to call these functions two times for the last
MST stream (once from the MST code and a second time from the DDI
code). The calls from the DDI code should only be done for SST
and not MST. Add the proper check for that.

This results in an MCE on ICL. My vague theory is that we turn off
the transcoder clock from the MST code and then we proceed to touch
something in the DDI code which still depends on that clock causing
the hardware to become upset. Though I can't really explain why
Stan's hack of omitting the pipe disable in the MST code would avoid
the MCE since we should still be turning off the transcoder clock.
But maybe there's something magic in the hw that keeps the clock on
as long as the pipe is on. Or maybe the clock isn't the problem and
we now touch something in the DDI disable code that really does need
the pipe to be still enabled.

v2: Rebase to latest drm-tip

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Reported-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Closes: https://gitlab.freedesktop.org/drm/intel/issues/901
Fixes: 773b4b54351c ("drm/i915: Move stuff from haswell_crtc_disable() into encoder .post_disable()")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108144550.29280-1-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

Merge drm/drm-next into drm-intel-next-queued

Sync with drm-next to get the new logging macros, among other things.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: use true,false for bool variable in intel_crt.c

Fixes coccicheck warning:

drivers/gpu/drm/i915/display/intel_crt.c:1066:1-28: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/display/intel_crt.c:928:2-29: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/display/intel_crt.c:443:2-29: WARNING: Assignment of 0/1 to bool variable

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ma Feng <mafeng.ma@huawei.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1578013959-31486-4-git-send-email-mafeng.ma@huawei.com

drm/i915/dp: use true,false for bool variable in intel_dp.c

Fixes coccicheck warning:

drivers/gpu/drm/i915/display/intel_dp.c:4950:1-33: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/display/intel_dp.c:4906:1-33: WARNING: Assignment of 0/1 to bool variable

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ma Feng <mafeng.ma@huawei.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1578013959-31486-3-git-send-email-mafeng.ma@huawei.com

drm/i915: use true,false for bool variable in i915_debugfs.c

Fixes coccicheck warning:

drivers/gpu/drm/i915/i915_debugfs.c:3078:4-36: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/i915_debugfs.c:3078:4-36: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/i915_debugfs.c:3080:4-36: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/i915_debugfs.c:3080:4-36: WARNING: Assignment of 0/1 to bool variable

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ma Feng <mafeng.ma@huawei.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1578013959-31486-2-git-send-email-mafeng.ma@huawei.com

drm/i915/gt: runtime-pm is no longer required for ce->ops->pin()

Now that we have moved the runtime-pm management out of
intel_context_acctive_acquire, and that itself out of ce->ops->pin(), no
explicit runtime pm wakeref is required in intel_context_pin().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200109085717.873326-3-chris@chris-wilson.co.uk

drm/i915/gt: Pull context activation into central intel_context_pin()

While this is encroaching on midlayer territory, having already made the
state allocation a previous step in pinning, we can now pull the common
intel_context_active_acquire() into intel_context_pin() itself. This is
a prelude to make the activation a separate step inside pinning, outside
of the ce->pin_mutex

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200109085717.873326-2-chris@chris-wilson.co.uk

drm/i915/gt: Push context state allocation earlier

Allow for knowledgeable users to preallocate the context state, and to
separate the allocation step from the pinning step during
intel_context_pin()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200109085717.873326-1-chris@chris-wilson.co.uk

drm/i915: Pin the context as we work on it

Since we now allow the intel_context_unpin() to run unserialised, we
risk our operations under the intel_context_lock_pinned() being run as
the context is unpinned (and thus invalidating our state). We can
atomically acquire the pin, testing to see if it is pinned in the
process, thus ensuring that the state remains consistent during the
course of the whole operation.

Fixes: 841350223816 ("drm/i915/gt: Drop mutex serialisation between context pin/unpin")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200109085142.871563-1-chris@chris-wilson.co.uk

drm/i915: Revert "drm/i915/tgl: Wa_1607138340"

This reverts commit 08fff7aeddc9dd72161b4c8fc27fbab12b4b9352.

For some yet unexplained reason not having this improves stability of some
media workloads.

Promise is that the media hang will be root caused properly and in the
meantime absence of this workaround is unlikely to cause problems.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Sudeep Dutt <sudeep.dutt@intel.com>
Cc: Francesco Balestrieri <francesco.balestrieri@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tony Ye <tony.ye@intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108161954.29739-1-tvrtko.ursulin@linux.intel.com

drm/i915: Reduce warning for i915_vma_pin_iomap() without runtime-pm

Access through the GGTT (iomap) into the vma does require the device to
be awake. However, we often take the i915_vma_pin_iomap() as an early
preparatory step that is long before we use the iomap. Asserting that
the device is awake at pin time does not protect us, and is merely a
nuisance.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108153550.3803446-2-chris@chris-wilson.co.uk

drm/i915: Early return for no-op i915_vma_pin_fence()

If we have no fence and desire no fence on the vma, return before we try
and take the vm->mutex.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108153550.3803446-1-chris@chris-wilson.co.uk

drm/i915/gt: Drop a defunct timeline assertion

intel_timeline_enter() has been decoupled from intel_timeline_pin() and
both enter/exit & pin/unpin are allowed [read expected] to run
concurrently with one another. The assertion that they had better not is
stale.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/940
References: a6edbca74b30 ("drm/i915/gt: Close race between engine_park and intel_gt_retire_requests")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107143826.3298401-1-chris@chris-wilson.co.uk

Merge tag 'drm-misc-next-2020-01-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v5.6:

UAPI Changes:
- Allow overriding number of bootup penguins in fbcon using fbcon=logo-count:n.

Cross-subsystem Changes:
- fbdev fixes for mmp, and make it work with CONFIG_COMPILE_TEST.
- Use devm_platform_ioremap_resource in fbdev drivers.
- Various small fbdev fixes.

Core Changes:
- Support scanline alignment for dumb buffers.
- Add atomic_check() hook to bridge ops, to support bus format negotiation.
- Add gem_create_object() to vram helpers.

Driver Changes:
- Rockchip: Add support for PX30.
- Use generic fbdev code and dumb helpers in hisilicon/hibmc.
- Add support for Leadtek LTK500HD1829 panel, and xinpeng XPP055C272.
- Clock fixes for atmel-hlcdc.
- Various smaller fixes to all drivers.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8eff1e3f-ef0a-2dd9-9a14-6273b1d6f963@linux.intel.com

drm: of: Fix linking when CONFIG_OF is not set

The new helper drm_of_lvds_get_dual_link_pixel_order() introduced in
commit 6529007522de has a fallback stub when CONFIG_OF is not set, but
the stub is declared in drm_of.h without a static inline. This causes
multiple definitions of the function to be linked when the CONFIG_OF
option isn't set. Fix it by making the stub static inline.

Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191219103703.8547-1-laurent.pinchart+renesas@ideasonboard.com

drm/i915/display: Fix warning about MST and DDI restrictions

Capturing the restrictions of the BSpec pages bellow:

SKL and CNL do not support MST in DDI E, DDI E only support 2 lanes
and it is mostly used to support a 4 lanes eDP panel together with
DDI A.
ICL's DDI E support MST just like other ports but DDI A is still eDP
and MIPI only.
TGL supports MST in any DDI, including DDI A but TGL has it's own
ddi_pre_enable_dp function already without any warning.

[  215.579791] ------------[ cut here ]------------
[  215.579794] WARN_ON(is_mst && (port == PORT_A || port == PORT_E))
[  215.579875] WARNING: CPU: 0 PID: 268 at drivers/gpu/drm/i915/display/intel_ddi.c:3576 intel_ddi_pre_enable+0x124/0xea0 [i915]
[  215.579878] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 btusb btrtl btbcm btintel bluetooth prime_numbers snd_hda_intel snd_intel_dspcfg snd_hda_codec e1000e snd_hwdep snd_hda_core asix mei_hdcp cdc_ether x86_pkg_temp_thermal mei_me snd_pcm r8152 coretemp usbnet mei crct10dif_pclmul mii ptp ecdh_generic crc32_pclmul i2c_i801 ecc pps_core ghash_clmulni_intel thunderbolt
[  215.579905] CPU: 0 PID: 268 Comm: kworker/0:2 Tainted: G        W         5.4.0-rc8-zeh+ #1307
[  215.579907] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP TLC, BIOS ICLSFWR1.R00.3201.A00.1905140358 05/14/2019
[  215.579912] Workqueue: events_long drm_dp_mst_link_probe_work
[  215.579975] RIP: 0010:intel_ddi_pre_enable+0x124/0xea0 [i915]
[  215.579978] Code: ff 8b 7c 24 10 89 44 24 30 85 ff 74 1f f7 44 24 18 fb ff ff ff 75 15 48 c7 c6 98 fa 48 a0 48 c7 c7 d3 df 4a a0 e8 cf d5 d0 e0 <0f> 0b 0f b6 4c 24 2c 41 8b b5 04 06 00 00 4c 89 e7 41 0f b6 95 0c
[  215.579980] RSP: 0018:ffffc90001a5f990 EFLAGS: 00010286
[  215.579984] RAX: 0000000000000000 RBX: ffff88848356a000 RCX: 0000000000000000
[  215.579986] RDX: 0000000000001df1 RSI: ffff88849340c998 RDI: ffffffff821489c5
[  215.579989] RBP: ffff88848356a000 R08: 00000000c021a419 R09: 0000000000000000
[  215.579991] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88848356a118
[  215.579994] R13: ffff88847f39c000 R14: ffff88847fe70000 R15: ffff88848356a000
[  215.579996] FS:  0000000000000000(0000) GS:ffff88849f800000(0000) knlGS:0000000000000000
[  215.579999] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  215.580001] CR2: 000055d3d5a26bc0 CR3: 0000000480ba6005 CR4: 0000000000760ef0
[  215.580004] PKRU: 55555554
[  215.580006] Call Trace:
[  215.580014]  ? drm_dp_mst_topology_put_port+0x6f/0x130
[  215.580072]  intel_mst_pre_enable_dp+0x14b/0x170 [i915]
[  215.580129]  intel_encoders_pre_enable+0x76/0x90 [i915]
[  215.580191]  haswell_crtc_enable+0x84/0x880 [i915]
[  215.580266]  intel_update_crtc+0x1e4/0x200 [i915]
[  215.580333]  skl_commit_modeset_enables+0x287/0x420 [i915]
[  215.580405]  intel_atomic_commit_tail+0x332/0x14e0 [i915]
[  215.580410]  ? queue_work_on+0x41/0x70
[  215.580489]  intel_atomic_commit+0x31e/0x350 [i915]
[  215.580500]  drm_client_modeset_commit_atomic+0x18b/0x220
[  215.580523]  drm_client_modeset_commit_force+0x4d/0x180
[  215.580531]  drm_fb_helper_restore_fbdev_mode_unlocked+0x46/0xa0
[  215.580538]  drm_fb_helper_set_par+0x27/0x50
[  215.580543]  drm_fb_helper_hotplug_event.part.0+0xa7/0xc0
[  215.580549]  drm_kms_helper_hotplug_event+0x21/0x30
[  215.580553]  process_one_work+0x25b/0x5b0
[  215.580566]  worker_thread+0x4b/0x3b0
[  215.580578]  kthread+0x100/0x140
[  215.580581]  ? process_one_work+0x5b0/0x5b0
[  215.580585]  ? kthread_park+0x80/0x80
[  215.580591]  ret_from_fork+0x24/0x50
[  215.580603] irq event stamp: 1393930
[  215.580606] hardirqs last  enabled at (1393929): [<ffffffff8112a013>] vprintk_emit+0x143/0x330
[  215.580609] hardirqs last disabled at (1393930): [<ffffffff81001cfa>] trace_hardirqs_off_thunk+0x1a/0x20
[  215.580613] softirqs last  enabled at (1393434): [<ffffffff81c00389>] __do_softirq+0x389/0x47f
[  215.580618] softirqs last disabled at (1393423): [<ffffffff810b7199>] irq_exit+0xa9/0xc0
[  215.580621] ---[ end trace afd44ea9caa6373e ]---

BSpec: 4217
BSpec: 14004
BSpec: 20584
BSpec: 50583
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107170922.153612-2-jose.souza@intel.com

drm/i915/display/icl+: Do not program clockgating

Talked with HW team and this is a left over, driver should not
program clockgating, mg or dekel firmware is reponsible for any
clockgating programing.

Also removing the register and bits definition related to clockgating.

v2:
Added WARN_ON

v3:
Only calling icl_phy_set_clock_gating() on intel_ddi_pre_enable_hdmi
for GEN11

v4:
ICL should also not program clockgating (thanks Matt for catching
this)

BSpec issue: 20885
BSpec: 49292
BSpec: 21735
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107170922.153612-1-jose.souza@intel.com

drm/i915/display: Force the state compute phase once to enable PSR

Recent improvements in the state tracking in i915 caused PSR to not be
enabled when reusing firmware/BIOS modeset, this is due to all initial
commits returning ealier in intel_atomic_check() as needs_modeset()
is always false.

To fix that here forcing the state compute phase in CRTC that is
driving the eDP that supports PSR once. Enable or disable PSR do not
require a fullmodeset, so user will still experience glitch free boot
process plus the power savings that PSR brings.

It was tried to set mode_changed in intel_initial_commit() but at
this point the connectors are not registered causing a crash when
computing encoder state.

v2:
- removed function return
- change arguments to match intel_hdcp_atomic_check

v3:
- replaced drm includes in intel_psr.h by forward declaration(Jani)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112253
Reported-by: <s.zharkoff@gmail.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106152128.195171-1-jose.souza@intel.com

drm/i915/gt: Always force restore freshly pinned contexts

It is highly unlikely, but still conceivable, that we submit a context
with the same GGTT address as last active on the HW. In this case, with
a matching LRCA, the HW would not restore the new context image causing
a potential violation of our context isolation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107172842.3315449-1-chris@chris-wilson.co.uk

drm/i915/gtt: split up i915_gem_gtt

Attempt to split i915_gem_gtt.[ch] into more manageable chunks.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107134009.3255354-1-chris@chris-wilson.co.uk

drm/i915/gt: Take responsibility for engine->release as the last step

In order to avoid a double cleanup on error, take ownership of
engine->release past the point of no [error] return.

Reported-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Fixes: e26b6d434147 ("drm/i915/gt: Pull GT initialisation under intel_gt_init()")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Tested-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107143118.3288995-1-chris@chris-wilson.co.uk

drm/i915/display: Use external dependency loop for port sync

This loop was added directly to intel_atomic_check() to be used by
all other features that have external pipe dependencies, so using it
and removing intel_atomic_check_synced_crtcs().

After this changes is_trans_port_sync_master() it not used anywhere,
so removing it.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106142823.145260-1-jose.souza@intel.com

drm/i915: fix an error code in intel_modeset_all_tiles()

There is a cut and paste bug so we return the wrong error code.

Fixes: a603f5bd1691 ("drm/i915/dp: Make sure all tiled connectors get added to the state with full modeset")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107130322.gdk5b6jurifr26c2@kili.mountain

drm/i915: Add missing include file <linux/math64.h>

Fix build error:
./drivers/gpu/drm/i915/selftests/i915_random.h: In function i915_prandom_u32_max_state:
./drivers/gpu/drm/i915/selftests/i915_random.h:48:23: error:
 implicit declaration of function mul_u32_u32; did you mean mul_u64_u32_div? [-Werror=implicit-function-declaration]
  return upper_32_bits(mul_u32_u32(prandom_u32_state(state), ep_ro));

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 7ce5b6850b47 ("drm/i915/selftests: Use mul_u32_u32() for 32b x 32b -> 64b result")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107135014.36472-1-yuehaibing@huawei.com

drm/i915/tgl: Gen-12 display can decompress surfaces compressed by the media engine

Detect the modifier corresponding to media compression to enable
display decompression for YUV and xRGB packed formats. A new modifier is
added so that the driver can distinguish between media and render
compressed buffers. Unlike render decompression, plane 6 and  plane 7 do not
support media decompression.

v2: Fix checkpatch warnings on code style (Lucas)

From DK:
Separate modifier array for planes that cannot decompress media (Ville)

v3: Support planar formats
v4: Switch plane order
v5:
- Use format block descriptors to get CCS subsampling calculation right
  everywhere.
- Extend the plane state normal view array to accommodate 4 color planes.
- Use helpers to convert between main and CCS planes.
v6: Add missing packed YUV formats to the MC format list. (Yang)
v7: Align UV planes to tile-row size.

Cc: Nanley G Chery <nanley.g.chery@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Yang A Shi <yang.a.shi@intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-8-imre.deak@intel.com

drm/fb: Extend format_info member arrays to handle four planes

addfb() uAPI has supported four planes for a while now, make format_info
compatible with that.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-7-imre.deak@intel.com

drm/framebuffer: Format modifier for Intel Gen-12 media compression

Gen-12 display can decompress surfaces compressed by the media engine, add
a new modifier as the driver needs to know the surface was compressed by
the media or render engine.

v2: Update code comment describing the color plane order for YUV
    semiplanar formats.

Cc: Nanley G Chery <nanley.g.chery@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-6-imre.deak@intel.com

drm/i915: Make sure plane dims are correct for UV CCS planes

As intel_fb_plane_get_subsampling() returns the subsampling factor wrt.
its main plane, for a CCS plane we need to apply both the main and the
CCS plane's subsampling factor on the FB's dimensions to get the CCS
plane's dimensions.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-5-imre.deak@intel.com

drm/i915: Add debug message for FB plane[0].offset!=0 error

Print a debug message if the FB plane[0] offset is not 0 as expected, to
help understainding an add FB IOCTL fail.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-4-imre.deak@intel.com

drm/i915/tgl: Make sure a semiplanar UV plane is tile row size aligned

Currently the GGTT offset of a UV plane in a semiplanar YUV FB is tile
size (4kB) aligned. I noticed, that enforcing only this alignment leads
oddly to random memory corruptions on TGL while scanning out Y-tiled
FBs. This issue can be easily reproduced with a UV plane offset that is
not aligned to the plane's tile row size.

Some experiments showed the correct alignment to be tile row size
indeed. This also makes sense, since the de-tiling fence created for the
object - with its own stride and so "left" and "right" edge - applies to
all the planes in the FB, so each tile row of all planes should be tile
row aligned.

In fact BSpec requires this alignment since SKL. On SKL we may enforce
this due to the AUX plane x,y coords check, but on ICL and TGL we don't.
For now enforce this only on TGL; I can follow up with any necessary
change for ICL after more tests.

BSpec requires a stricter alignment for linear UV planes too (kind of a
tile row alignment), but it's unclear whether that's really needed
(couldn't be explained with the de-tiling fence as above) and enforcing
that could break existing user space; so avoid that too for now until
more tests.

v2:
- Clarify the commit log wrt. the address space the alignment applies to.
  (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-3-imre.deak@intel.com

drm/i915: Add support for non-power-of-2 FB plane alignment

At least one framebuffer plane on TGL - the UV plane of YUV semiplanar
FBs - requires a non-power-of-2 alignment, so add support for this. This
new alignment restriction applies only to an offset within an FB, so the
GEM buffer itself containing the FB must still be power-of-2 aligned.
Add a check for this (in practice plane 0, since the plane 0 offset must
be 0).

v2:
- Fix WARN check for alignment=0.
v3:
- Return error for alignment programming bugs. (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231233756.18753-2-imre.deak@intel.com

drm/mgag200: Add module parameter to pin all buffers at offset 0

For hardware that does not interpret the startadd field correctly,
add the module parameter 'hw_bug_no_startadd', which enables the
workaround.

v3:
* style and typo fixes
v2:
* ask user for feedback if the option is active

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: John Donnelly <john.p.donnelly@oracle.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191126101950.11989-1-tzimmermann@suse.de

drm/vram-helper: Support struct drm_driver.gem_create_object

Drivers that what to allocate VRAM GEM objects with additional fields
can now do this by implementing struct drm_driver.gem_create_object.

v3:
* separately check allocation failure in if/else branches
  before upcast to gbo
v2:
* only cast to gbo within if branch; set gbo directly
  in else branch

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106125745.13797-9-tzimmermann@suse.de

drm/vram-helper: Remove BO device from public interface

TTM is an implementation detail of the VRAM helpers and therefore
shouldn't be exposed to the callers. There's only one correct value
for the BO device anyway, which is the one stored in the DRM device.

So remove struct ttm_bo_device from the VRAM-helper interface and
use the device's VRAM manager unconditionally. The GEM initializer
function fails if the VRAM manager has not been initialized.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106125745.13797-8-tzimmermann@suse.de

drm/vram-helper: Remove interruptible flag from public interface

The flag 'interruptible', which is passed to various functions,
is always set to be false. Remove it and hard-code the value.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106125745.13797-7-tzimmermann@suse.de

drm/bridge: Add the necessary bits to support bus format negotiation

drm_bridge_state is extended to describe the input and output bus
configurations. These bus configurations are exposed through the
drm_bus_cfg struct which encodes the configuration of a physical
bus between two components in an output pipeline, usually between
two bridges, an encoder and a bridge, or a bridge and a connector.

The bus configuration is stored in drm_bridge_state separately for
the input and output buses, as seen from the point of view of each
bridge. The bus configuration of a bridge output is usually identical
to the configuration of the next bridge's input, but may differ if
the signals are modified between the two bridges, for instance by an
inverter on the board. The input and output configurations of a
bridge may differ if the bridge modifies the signals internally,
for instance by performing format conversion, or*modifying signals
polarities.

Bus format negotiation is automated by the core, drivers just have
to implement the ->atomic_get_{output,input}_bus_fmts() hooks if they
want to take part to this negotiation. Negotiation happens in reverse
order, starting from the last element of the chain (the one directly
connected to the display) up to the first element of the chain (the one
connected to the encoder).
During this negotiation all supported formats are tested until we find
one that works, meaning that the formats array should be in decreasing
preference order (assuming the driver has a preference order).

Note that the bus format negotiation works even if some elements in the
chain don't implement the ->atomic_get_{output,input}_bus_fmts() hooks.
In that case, the core advertises only MEDIA_BUS_FMT_FIXED and lets
the previous bridge element decide what to do (most of the time, bridge
drivers will pick a default bus format or extract this piece of
information from somewhere else, like a FW property).

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
[narmstrong: fixed doc in include/drm/drm_bridge.h:69 fmt->format]
Link: https://patchwork.freedesktop.org/patch/msgid/20200106143409.32321-5-narmstrong@baylibre.com

drm/bridge: Add an ->atomic_check() hook

So that bridge drivers have a way to check/reject an atomic operation.
The drm_atomic_bridge_chain_check() (which is just a wrapper around
the ->atomic_check() hook) is called in place of
drm_bridge_chain_mode_fixup() (when ->atomic_check() is not implemented,
the core falls back on ->mode_fixup(), so the behavior should stay
the same for existing bridge drivers).

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106143409.32321-4-narmstrong@baylibre.com

drm/bridge: Patch atomic hooks to take a drm_bridge_state

This way the drm_bridge_funcs interface is consistent with the rest of
the subsystem.

The only driver implementing those hooks (analogix DP) is patched too.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
[narmstrong: renamed state as old_bridge_state in rcar_lvds_atomic_disable]
Link: https://patchwork.freedesktop.org/patch/msgid/20200106143409.32321-3-narmstrong@baylibre.com

drm/bridge: Add a drm_bridge_state object

One of the last remaining objects to not have its atomic state.

This is being motivated by our attempt to support runtime bus-format
negotiation between elements of the bridge chain.
This patch just paves the road for such a feature by adding a new
drm_bridge_state object inheriting from drm_private_obj so we can
re-use some of the existing state initialization/tracking logic.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106143409.32321-2-narmstrong@baylibre.com

Revert "drm: atmel-hlcdc: enable sys_clk during initalization."

This reverts commit d2c755e66617620b729041c625a6396c81d1231c
("drm: atmel-hlcdc: enable sys_clk during initalization."). With
commit "drm: atmel-hlcdc: enable clock before configuring timing engine"
there is no need for this patch. Code is also simpler.

Cc: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1576672109-22707-7-git-send-email-claudiu.beznea@microchip.com

drm: atmel-hlcdc: prefer a lower pixel-clock than requested

The intention was to only select a higher pixel-clock rate than the
requested, if a slight overclocking would result in a rate significantly
closer to the requested rate than if the conservative lower pixel-clock
rate is selected. The fixed patch has the logic the other way around and
actually prefers the higher frequency. Fix that.

Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Fixes: 9946a3a9dbed ("drm/atmel-hlcdc: allow selecting a higher pixel-clock than requested")
Reported-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: <stable@vger.kernel.org> # v4.20+
Link: https://patchwork.freedesktop.org/patch/msgid/1576672109-22707-6-git-send-email-claudiu.beznea@microchip.com

drm: atmel-hlcdc: enable clock before configuring timing engine

Changing pixel clock source without having this clock source enabled
will block the timing engine and the next operations after (in this case
setting ATMEL_HLCDC_CFG(5) settings in atmel_hlcdc_crtc_mode_set_nofb()
will fail). It is recomended (although in datasheet this is not present)
to actually enabled pixel clock source before doing any changes on timing
enginge (only SAM9X60 datasheet specifies that the peripheral clock and
pixel clock must be enabled before using LCD controller).

Fixes: 1a396789f65a ("drm: add Atmel HLCDC Display Controller support")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: <stable@vger.kernel.org> # v4.0+
Link: https://patchwork.freedesktop.org/patch/msgid/1576672109-22707-3-git-send-email-claudiu.beznea@microchip.com

drm: atmel-hlcdc: use double rate for pixel clock only if supported

Doubled system clock should be used as pixel cock source only if this
is supported. This is emphasized by the value of
atmel_hlcdc_crtc::dc::desc::fixed_clksrc.

Fixes: a6eca2abdd42 ("drm: atmel-hlcdc: add config option for clock selection")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: <stable@vger.kernel.org> # v5.3+
Link: https://patchwork.freedesktop.org/patch/msgid/1576672109-22707-2-git-send-email-claudiu.beznea@microchip.com

dt-bindings: fix warnings in xinpeng,xpp055c272.yaml

The reg property in the example caused following warnings:

xinpeng,xpp055c272.example.dts:20.17-27: Warning (reg_format): /example-0/dsi@ff450000/panel@0:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)

xinpeng,xpp055c272.example.dt.yaml: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
xinpeng,xpp055c272.example.dt.yaml: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
xinpeng,xpp055c272.example.dt.yaml: Warning (spi_bus_reg): Failed prerequisite 'reg_format'
xinpeng,xpp055c272.example.dts:18.21-24.15: Warning (avoid_default_addr_size): /example-0/dsi@ff450000/panel@0: Relying on default #address-cells value
xinpeng,xpp055c272.example.dts:18.21-24.15: Warning (avoid_default_addr_size): /example-0/dsi@ff450000/panel@0: Relying on default #size-cells value

Added #address-cells and #size-cells to silence the warning.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20200106181731.GA24294@ravnborg.org

drm/i915: Limit audio CDCLK>=2*BCLK constraint back to GLK only

Revert changes done in commit f6ec9483091f ("drm/i915: extend audio
CDCLK>=2*BCLK constraint to more platforms"). Audio drivers
communicate with i915 over HDA bus multiple times during system
boot-up and each of these transactions result in matching
get_power/put_power calls to i915, and depending on the platform,
a modeset change causing visible flicker.

GLK is the only platform with minimum CDCLK significantly lower
than BCLK, and thus for GLK setting a higher CDCLK is mandatory.

For other platforms, minimum CDCLK is close but below 2*BCLK
(e.g. on ICL, CDCLK=176.4kHz with BCLK=96kHz). Spec-wise the constraint
should be set, but in practise no communication errors have been
reported and the downside if set is the flicker observed at boot-time.

Revert to old behaviour until better mechanism to manage
probe-time clocks is available.

The full CDCLK>=2*BCLK constraint is still enforced at pipe
enable time in intel_crtc_compute_min_cdclk().

Bugzilla: https://gitlab.freedesktop.org/drm/intel/issues/913
Fixes: f6ec9483091f ("drm/i915: extend audio CDCLK>=2*BCLK constraint to more platforms")
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191231140007.31728-1-kai.vehmanen@linux.intel.com

drm/bridge: cdns: remove set but not used variable 'nlanes'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/bridge/cdns-dsi.c: In function ‘cdns_dsi_mode2cfg’:
drivers/gpu/drm/bridge/cdns-dsi.c:515:11: warning: variable ‘nlanes’
set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed.

Signed-off-by: yu kuai <yukuai3@huawei.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191226121415.39483-1-yukuai3@huawei.com

drm/bridge: cdns: remove set but not used variable 'bpp'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/bridge/cdns-dsi.c: In function
‘cdns_dsi_bridge_enable’:
drivers/gpu/drm/bridge/cdns-dsi.c:788:6: warning: variable ‘bpp’
set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed.

Signed-off-by: yu kuai <yukuai3@huawei.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191226121207.2099-1-yukuai3@huawei.com

drm: meson: Remove unneeded semicolon

Fixes coccicheck warning:

drivers/gpu/drm/meson/meson_crtc.c:360:3-4: Unneeded semicolon
drivers/gpu/drm/meson/meson_plane.c:181:2-3: Unneeded semicolon

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1576468701-69717-1-git-send-email-zhengbin13@huawei.com

drm/i915/gt: Mark up virtual engine uabi_instance

Be sure to initialise the uabi_instance on the virtual engine to the
special invalid value, just in case we ever peek at it from the uAPI.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: 750e76b4f9f6 ("drm/i915/gt: Move the [class][inst] lookup for engines onto the GT")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: <stable@vger.kernel.org> # v5.4+
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106123921.2543886-1-chris@chris-wilson.co.uk

drm: bridge: dw-hdmi: constify copied structure

The dw_hdmi_hw structure is only copied into another structure,
so make it const.

The opportunity for this change was found using Coccinelle.

Fixes: 7ed6c665e19d ("drm: bridge/dw_hdmi-ahb-audio: add audio driver")
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1577864614-5543-16-git-send-email-Julia.Lawall@inria.fr

drm/i915/gt: Use memset_p to clear the ports

Put memset_p to use to clear the array of pointers used for tracking the
ELSP.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106114234.2529613-6-chris@chris-wilson.co.uk

drm/i915/gt: Drop mutex serialisation between context pin/unpin

The last remaining reason for serialising the pin/unpin of the
intel_context is to ensure that our preallocated wakerefs are not
consumed too early (i.e. the unpin of the previous phase does not emit
the idle barriers for this phase before we even submit). All of the
other operations within the context pin/unpin are supposed to be
atomic...  Therefore, we can reduce the serialisation to being just on
the i915_active.preallocated_barriers itself and drop the nested
pin_mutex from intel_context_unpin().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106114234.2529613-5-chris@chris-wilson.co.uk

drm/i915/gt: Convert the final GEM_TRACE to GT_TRACE and co

Convert the few remaining GEM_TRACE() used for debugging over to the
appropriate GT_TRACE or RQ_TRACE.

References: 639f2f24895f ("drm/i915: Introduce new macros for tracing")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106114234.2529613-4-chris@chris-wilson.co.uk

drm/i915: Merge i915_request.flags with i915_request.fence.flags

As we already have a flags field buried within i915_request, reuse it!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106114234.2529613-3-chris@chris-wilson.co.uk

drm/i915/selftests: Impose a timeout for request submission

Avoid spinning indefinitely waiting for the request to be submitted, and
instead apply a timeout. A secondary benefit is that the error message
will show which suspect is blocked.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106114234.2529613-2-chris@chris-wilson.co.uk

drm/i915/selftests: Fixup sparse __user annotation on local var

The local var does not need the __user as it exists on the kernel stack
and not a pointer into the __user address space.

drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c:989:9: warning: dereference of noderef expression
drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c:990:13: warning: dereference of noderef expression

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106114234.2529613-1-chris@chris-wilson.co.uk

drm/hisilicon/hibmc: Export VRAM MM information to debugfs

This change makes information about VRAM consumption available on
debugfs. See

  /sys/kernel/debug/dri/0/vram-mm

for an overview of how VRAM is being used.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203083819.6643-6-tzimmermann@suse.de

drm/hisilicon/hibmc: Implement hibmc_dumb_create() with generic helpers

The hibmc driver aligns scanlines to 16 bytes. By using the new pitch_align
argument of drm_gem_vram_fill_create_dumb(), convert hibmc over.

v2:
* move changes to VRAM helpers into separate patch

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203083819.6643-5-tzimmermann@suse.de

drm/vram: Support scanline alignment for dumb buffers

Adding the pitch alignment as an argument to
drm_gem_vram_fill_create_dumb() allows to align scanlines to certain
offsets. A value of 0 disables scanline pitches.

v3:
* only do power-of-2 test if pitch_align given; fails otherwise
* mgag200: call drm_gem_vram_fill_create_dumb() with pitch_align
v2:
* split of patch from related hibmc changes
* test if scanline pitch is power of 2

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203083819.6643-4-tzimmermann@suse.de

drm/hisilicon/hibmc: Replace struct hibmc_framebuffer with generic code

The hibmc driver's struct hibmc_framebuffer stores a DRM framebuffer
with an associated GEM object. This functionality is also provided by
generic code. Switch hibmc over.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203083819.6643-3-tzimmermann@suse.de

drm/hisilicon/hibmc: Switch to generic fbdev emulation

There's nothing special about hibmc's fbdev emulation that is not
provided by the generic implementation. Switch over and remove the
driver's code.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203083819.6643-2-tzimmermann@suse.de

drm: rockchip: rk3066_hdmi: set edid fifo address

Fix edid reading error when edid's block > 2.

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191211203417.19448-1-jbx6244@gmail.com

drm/rockchip: lvds: Add PX30 support

Introduce PX30 LVDS support. This means adding the relevant helper
functions, a specific probe and also the initialization of a specific
PHY.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-10-miquel.raynal@bootlin.com

Merge drm/drm-next into drm-misc-next

Requested, and we need v5.5-rc1 backported as our current branch is still based on v5.4.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

drm/rockchip: lvds: move hardware-specific functions together

Reorganize a bit the functions order to clarify the driver and separate
hardware independent and specific functions a bit. This change only moves
functions around, there is no functional change.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
[adapted to recent drm_panel_get_modes() param change ]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-9-miquel.raynal@bootlin.com

drm/rockchip: lvds: improve error handling in helper functions

Return errors instead of returning void from internal helpers. When
these helpers are called, check the returned value and print an error
message in this case and not blindly continue.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-8-miquel.raynal@bootlin.com

drm/rockchip: lvds: Create an RK3288 specific probe function

The probe function is highly adapted to the RK3288 specificities, move
all specific bits into an "rk3288_probe" function, also part of the
platform data.

The goal is to ease the addition of new flavors of Rockchip LVDS IPs.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-7-miquel.raynal@bootlin.com

drm/rockchip: lvds: Change platform data to hold helper_funcs pointer

Prepare the introduction of PX30 support by using
drm_encoder_helper_funcs as platform data instead of multiple register
names which are specific to rk3288 and not generic to all Rockchip
IPs. This way adding support for a new flavor of a similar IP will be
a matter of adding the relevant helper funcs.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-6-miquel.raynal@bootlin.com

drm/rockchip: lvds: Harmonize function names

Prepare the introduction of PX30 support by clarifying the function
prefixes.

We continue to prefix with 'rockchip_lvds_' generic functions that are
not specific to a single hardware. Functions implying hardware
modifications are now prefixed with 'rk3288_lvds_'.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-5-miquel.raynal@bootlin.com

drm/rockchip: lvds: Fix indentation of a #define

Fix a #define indentation before adding more lines.

Fixes: 34cc0aa25456 ("drm/rockchip: Add support for Rockchip Soc LVDS")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-4-miquel.raynal@bootlin.com

dt-bindings: display: rockchip-lvds: Document PX30 PHY

PX30 SoCs use a single PHY shared by two display pipelines: MIPI DSI
and LVDS. In the case of the LVDS IP, document the possibility to fill
a PHY handle.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-3-miquel.raynal@bootlin.com

dt-bindings: display: rockchip-lvds: Declare PX30 compatible

Document the PX30 LVDS compatible.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224143900.23567-2-miquel.raynal@bootlin.com

drm/i915: Create dumb buffer from LMEM

When LMEM is supported, dumb buffer preferred to be created from LMEM.

v2:
  Parameters are reshuffled. [Chris]
v3:
  s/region_id/mem_type
v4:
  use the i915_gem_object_create_region [chris]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200104191043.2207314-2-chris@chris-wilson.co.uk

drm/i915: lookup for mem_region of a mem_type

Lookup function to retrieve the pointer to a memory region of
a mem_type.

v2:
  for_each_memory_region is used.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200104191043.2207314-1-chris@chris-wilson.co.uk

drm/i915/selftests: Compare user mmap against GPU

Check that the user writes into their mmap are visible on the GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Acked-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103204137.2131004-3-chris@chris-wilson.co.uk

drm/i915/selftests: Extend fault handler selftests to all memory regions

Instead of testing individually our new fault handlers, iterate over all
memory regions and test all from one interface.

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103204137.2131004-2-chris@chris-wilson.co.uk

drm/i915/gem: Extend mmap support for lmem

Local memory objects are similar to our usual scatterlist, but instead
of using the struct page stored therein, we need to use the
sg->dma_address.

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103204137.2131004-1-chris@chris-wilson.co.uk

drm/panel: add panel driver for Leadtek LTK500HD1829

The LTK500HD1829 is 5.5" DSI display.

v5:
  - Fix some trivial checkpatch warnings while applying (sam)

changes in v4:
- drop error message if backlight not found, no other panel
  does that and if needed it should live in drm_panel_of_backlight
changes in v3:
- drop one more overlooked panel->drm access

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112641.30647-3-heiko@sntech.de

dt-bindings: display: panel: Add binding document for Leadtek LTK500HD1829

The LTK500HD1829 is a 5.0" 720x1280 DSI display.

v3:
  - fixed example by adding address,size-cells (sam)

changes in v2:
- fix id (Maxime)
- drop port (Maxime)

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112641.30647-2-heiko@sntech.de

dt-bindings: Add vendor prefix for Leadtek Technology

Shenzhen Leadtek Technology Co., Ltd. produces for example display
and touch panels.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112641.30647-1-heiko@sntech.de

drm/panel: add panel driver for Xinpeng XPP055C272 panels

Base on the somewhat similar Rocktech driver but adapted for
panel-specific init of the XPP055C272.

changes in v5:
- drop error message when backlight not found, no other panel
  does that and if needed it should live in drm_panel_of_backlight
changes in v4:
  none
changes in v3:
- remove wrong negative sync flags from display-mode to fix a display
  artifact of the output getting move a tiny bit to the right
changes in v2:
- move to drm-panel-internal backlight handling (Sam)
- adapt to changes that happened to drm_panel structs+functions (Sam)
- sort includes (Sam)
- drop unnecessary DRV_NAME constant (Sam)
- do mipi_dsi_dcs_exit_sleep_mode and mipi_dsi_dcs_set_display_on
  in panel prepare (not init_sequence) to keep symmetric (Sam)

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112907.30758-3-heiko@sntech.de

dt-bindings: display: panel: Add binding document for Xinpeng XPP055C272

The XPP055C272 is a 5.5" 720x1280 DSI display.

changes in v4:
- fix id (Maxime)
- drop port (Maxime)
changes in v2:
- add size info into binding title (Sam)
- add more required properties (Sam)

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112907.30758-2-heiko@sntech.de

dt-bindings: Add vendor prefix for Xinpeng Technology

Shenzhen Xinpeng Technology Co., Ltd produces for example display panels.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112907.30758-1-heiko@sntech.de

drm/i915/selftests: Make headers self-contained

Include the types used by the headers to they can be compiled
standalone.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103104516.1757103-2-chris@chris-wilson.co.uk

drm/i915/selftests: Move igt_atomic_section[] out of the header

Move the definition of the igt_atomic_section[] into a C file, leaving
the declaration in the header so as not to upset headertest!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103104516.1757103-1-chris@chris-wilson.co.uk

omapfb/dss: remove unneeded conversions to bool

Found with scripts/coccinelle/misc/boolconv.cocci.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Cc: Jiri Kosina <trivial@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191016180424.23907-1-afd@ti.com

video: pxafb: Use devm_platform_ioremap_resource() in pxafb_probe()

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Daniel Mack <daniel@zonque.org>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: YueHaibing <yuehaibing@huawei.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a1b804b1-43c2-327a-d6d1-df49aebec680@web.de

video: ocfb: Use devm_platform_ioremap_resource() in ocfb_probe()

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/61b75aa6-ff92-e0ed-53f2-50a95d93d1f6@web.de

video: fbdev: fsl-diu-fb: mark expected switch fall-throughs

Mark switch cases where we are expecting to fall through.

Fix the following warnings (Building: mpc512x_defconfig powerpc):

drivers/video/fbdev/fsl-diu-fb.c: In function ‘fsl_diu_ioctl’:
./include/linux/device.h:1750:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
  _dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/video/fbdev/fsl-diu-fb.c:1287:3: note: in expansion of macro ‘dev_warn’
   dev_warn(info->dev,
   ^~~~~~~~
drivers/video/fbdev/fsl-diu-fb.c:1290:2: note: here
  case MFB_SET_PIXFMT:
  ^~~~
In file included from ./include/linux/acpi.h:15:0,
                 from ./include/linux/i2c.h:13,
                 from ./include/uapi/linux/fb.h:6,
                 from ./include/linux/fb.h:6,
                 from drivers/video/fbdev/fsl-diu-fb.c:20:
./include/linux/device.h:1750:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
  _dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/video/fbdev/fsl-diu-fb.c:1296:3: note: in expansion of macro ‘dev_warn’
   dev_warn(info->dev,
   ^~~~~~~~
drivers/video/fbdev/fsl-diu-fb.c:1299:2: note: here
  case MFB_GET_PIXFMT:
  ^~~~

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: Timur Tabi <timur@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190911113604.GA31512@embeddedor

fbdev: matrox: make array wtst_xlat static const, makes object smaller

Don't populate the array wtst_xlat on the stack but instead make it
static const. Makes the object code smaller by 89 bytes.

Before:
   text    data     bss     dec     hex filename
  14347     840       0   15187    3b53 fbdev/matrox/matroxfb_misc.o

After:
   text    data     bss     dec     hex filename
  14162     936       0   15098    3afa fbdev/matrox/matroxfb_misc.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
[b.zolnierkie: use u8 while at it (suggested by Ville Syrjälä)]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190906181114.31414-1-colin.king@canonical.com

fbdev/sa1100fb: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190904115754.21612-1-yuehaibing@huawei.com

fbdev: s3c-fb: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190904115523.25068-1-yuehaibing@huawei.com

fbdev: omapfb: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Allison Randal <allison@lohutok.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190904115406.23880-1-yuehaibing@huawei.com

video/fbdev/68328fb: Remove dead code

This is dead code since 3.15. If their is no plan to
use it further, these can be removed forever.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Sabyasachi Gupta <sabyasachi.linux@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1567428544-8620-1-git-send-email-jrdr.linux@gmail.com