From 5a69d13d78d730261edcf83a96704f388c6357d1 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Wed, 16 Mar 2016 12:43:30 +0200 Subject: [PATCH] drm/i915: move VBT based LVDS presence check to intel_bios.c Hide knowledge about VBT child devices in intel_bios.c. Reviewed-by: Daniel Vetter Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-2-git-send-email-jani.nikula@intel.com --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_bios.c | 50 +++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_lvds.c | 53 +------------------------------ 3 files changed, 52 insertions(+), 52 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 3724edda7436..c3c8663573bc 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3354,6 +3354,7 @@ extern void intel_i2c_reset(struct drm_device *dev); int intel_bios_init(struct drm_i915_private *dev_priv); bool intel_bios_is_valid_vbt(const void *buf, size_t size); bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv); +bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin); /* intel_opregion.c */ #ifdef CONFIG_ACPI diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index d5e6da01adaa..4f7eba36a849 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1472,3 +1472,53 @@ bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv) return false; } + +/** + * intel_bios_is_lvds_present - is LVDS present in VBT + * @dev_priv: i915 device instance + * @i2c_pin: i2c pin for LVDS if present + * + * Return true if LVDS is present. If no child devices were parsed from VBT, + * assume LVDS is present. + */ +bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin) +{ + int i; + + if (!dev_priv->vbt.child_dev_num) + return true; + + for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { + union child_device_config *uchild = dev_priv->vbt.child_dev + i; + struct old_child_dev_config *child = &uchild->old; + + /* If the device type is not LFP, continue. + * We have to check both the new identifiers as well as the + * old for compatibility with some BIOSes. + */ + if (child->device_type != DEVICE_TYPE_INT_LFP && + child->device_type != DEVICE_TYPE_LFP) + continue; + + if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin)) + *i2c_pin = child->i2c_pin; + + /* However, we cannot trust the BIOS writers to populate + * the VBT correctly. Since LVDS requires additional + * information from AIM blocks, a non-zero addin offset is + * a good indicator that the LVDS is actually present. + */ + if (child->addin_offset) + return true; + + /* But even then some BIOS writers perform some black magic + * and instantiate the device without reference to any + * additional data. Trust that if the VBT was written into + * the OpRegion then they have validated the LVDS's existence. + */ + if (dev_priv->opregion.vbt) + return true; + } + + return false; +} diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index cbd1b0d547ee..766ba566fef1 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -775,57 +775,6 @@ static const struct dmi_system_id intel_no_lvds[] = { { } /* terminating entry */ }; -/* - * Enumerate the child dev array parsed from VBT to check whether - * the LVDS is present. - * If it is present, return 1. - * If it is not present, return false. - * If no child dev is parsed from VBT, it assumes that the LVDS is present. - */ -static bool lvds_is_present_in_vbt(struct drm_device *dev, - u8 *i2c_pin) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int i; - - if (!dev_priv->vbt.child_dev_num) - return true; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - union child_device_config *uchild = dev_priv->vbt.child_dev + i; - struct old_child_dev_config *child = &uchild->old; - - /* If the device type is not LFP, continue. - * We have to check both the new identifiers as well as the - * old for compatibility with some BIOSes. - */ - if (child->device_type != DEVICE_TYPE_INT_LFP && - child->device_type != DEVICE_TYPE_LFP) - continue; - - if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin)) - *i2c_pin = child->i2c_pin; - - /* However, we cannot trust the BIOS writers to populate - * the VBT correctly. Since LVDS requires additional - * information from AIM blocks, a non-zero addin offset is - * a good indicator that the LVDS is actually present. - */ - if (child->addin_offset) - return true; - - /* But even then some BIOS writers perform some black magic - * and instantiate the device without reference to any - * additional data. Trust that if the VBT was written into - * the OpRegion then they have validated the LVDS's existence. - */ - if (dev_priv->opregion.vbt) - return true; - } - - return false; -} - static int intel_dual_link_lvds_callback(const struct dmi_system_id *id) { DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident); @@ -982,7 +931,7 @@ void intel_lvds_init(struct drm_device *dev) } pin = GMBUS_PIN_PANEL; - if (!lvds_is_present_in_vbt(dev, &pin)) { + if (!intel_bios_is_lvds_present(dev_priv, &pin)) { if ((lvds & LVDS_PORT_EN) == 0) { DRM_DEBUG_KMS("LVDS is not present in VBT\n"); return; -- 2.30.2