This was added in
commit
0a3e67a4caac273a3bfc4ced3da364830b1ab241
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Tue Sep 30 12:14:26 2008 -0700
drm: Rework vblank-wait handling to allow interrupt reduction.
to stay backwards-compatible with old UMS code that didn't even tell
the kernel when it did a modeset, so that the kernel could
save/restore vblank counters. At worst this means vblanks will be
somewhat funky on a setup that very likely no one still runs.
So let's just nuke it.
Plan B would be to set it unconditionally in drm_vblank_init for kms
drivers, instead of in each driver separately. So if this patch breaks
anything please only restore the hunks in drmP.h and drm_irq.c, plus
add a check for DRIVER_MODESET in drm_vblank_init.
Stumbled over this in a discussion on irc with Chris.
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
if (r) {
return r;
}
- adev->ddev->vblank_disable_allowed = true;
/* enable msi */
adev->irq.msi_enabled = false;
DRM_ERROR("failed to initialise vblank\n");
goto err_vblank;
}
- drm->vblank_disable_allowed = true;
drm_mode_config_reset(drm);
drm_kms_helper_poll_init(drm);
goto err_comp;
dev->irq_enabled = true;
- dev->vblank_disable_allowed = 1;
ret = armada_fbdev_init(dev);
if (ret)
unsigned int pipe = vblank->pipe;
unsigned long irqflags;
- if (!dev->vblank_disable_allowed)
- return;
-
spin_lock_irqsave(&dev->vbl_lock, irqflags);
if (atomic_read(&vblank->refcount) == 0 && vblank->enabled) {
DRM_DEBUG("disabling vblank on crtc %u\n", pipe);
"get_vblank_timestamp == NULL\n");
}
- dev->vblank_disable_allowed = false;
-
return 0;
err:
if (vblank->inmodeset) {
spin_lock_irqsave(&dev->vbl_lock, irqflags);
- dev->vblank_disable_allowed = true;
drm_reset_vblank_timestamp(dev, pipe);
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
*/
dev->irq_enabled = true;
- /*
- * with vblank_disable_allowed = true, vblank interrupt will be disabled
- * by drm timer once a current process gives up ownership of
- * vblank event.(after drm_vblank_put function is called)
- */
- dev->vblank_disable_allowed = true;
-
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(dev);
dev_err(dev->dev, "failed to initialize vblank\n");
goto done;
}
- dev->vblank_disable_allowed = true;
ret = fsl_dcu_drm_irq_init(dev);
if (ret < 0)
drm_irq_install(dev, dev->pdev->irq);
- dev->vblank_disable_allowed = true;
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
dev->driver->get_vblank_counter = psb_get_vblank_counter;
intel_modeset_gem_init(dev);
- /* Always safe in the mode setting case. */
- /* FIXME: do pre/post-mode set stuff in core KMS code */
- dev->vblank_disable_allowed = true;
if (INTEL_INFO(dev)->num_pipes == 0)
return 0;
if (ret)
goto err_kms;
- /*
- * with vblank_disable_allowed = true, vblank interrupt will be
- * disabled by drm timer once a current process gives up ownership
- * of vblank event. (after drm_vblank_put function is called)
- */
- drm->vblank_disable_allowed = true;
-
platform_set_drvdata(drm->platformdev, drm);
/* Now try and bind all our sub-components */
if (r) {
return r;
}
- rdev->ddev->vblank_disable_allowed = true;
/* enable msi */
rdev->msi_enabled = 0;
if (ret)
goto err_kms_helper_poll_fini;
- /*
- * with vblank_disable_allowed = true, vblank interrupt will be disabled
- * by drm timer once a current process gives up ownership of
- * vblank event.(after drm_vblank_put function is called)
- */
- drm_dev->vblank_disable_allowed = true;
-
drm_mode_config_reset(drm_dev);
ret = rockchip_drm_fbdev_init(drm_dev);
/* syncpoints are used for full 32-bit hardware VBLANK counters */
drm->max_vblank_count = 0xffffffff;
- drm->vblank_disable_allowed = true;
err = drm_vblank_init(drm, drm->mode_config.num_crtc);
if (err < 0)
dev->mode_config.preferred_depth = 24;
dev->mode_config.async_page_flip = true;
- dev->vblank_disable_allowed = true;
-
drm_mode_config_reset(dev);
vc4->fbdev = drm_fbdev_cma_init(dev, 32,
bool irq_enabled;
int irq;
- /*
- * At load time, disabling the vblank interrupt won't be allowed since
- * old clients may not call the modeset ioctl and therefore misbehave.
- * Once the modeset ioctl *has* been called though, we can safely
- * disable them when unused.
- */
- bool vblank_disable_allowed;
-
/*
* If true, vblank interrupt will be disabled immediately when the
* refcount drops to zero, as opposed to via the vblank disable
projects / openwrt / staging / blogic.git / commitdiff