From 9d2e921522bed01d00961d1a5deff840168e692d Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Mon, 12 Nov 2012 14:33:45 +0200 Subject: [PATCH] drm/i915: do not default to 18 bpp for eDP if missing from VBT commit 9a30a61f3516871c5c638fd7c025fbaa11ddf7fe upstream. commit 500a8cc466a24e2fbc4c86ef9c6467ae2ffdeb0c Author: Zhenyu Wang Date: Wed Jan 13 11:19:52 2010 +0800 drm/i915: parse eDP panel color depth from VBT block originally introduced parsing bpp for eDP from VBT, with a default of 18 bpp if the eDP BIOS data block is not present. Turns out that default seems to break the Macbook Pro with retina display, as noted in commit 4344b813f105a19f793f1fd93ad775b784648b95 Author: Daniel Vetter Date: Fri Aug 10 11:10:20 2012 +0200 drm/i915: ignore eDP bpc settings from vbt Since we can't ignore bpc settings from VBT completely after all, get rid of the default. Do not clamp eDP to 18 bpp by default if the eDP BDB is missing from VBT. Signed-off-by: Jani Nikula Tested-by: Henrik Rydberg [danvet: paste in the updated commit message from irc.] Signed-off-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_bios.c | 11 ++--------- drivers/gpu/drm/i915/intel_display.c | 2 +- 2 files changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 8c6074154bf6..d0df62a7ce84 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -500,12 +500,8 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) edp = find_section(bdb, BDB_EDP); if (!edp) { - if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) { - DRM_DEBUG_KMS("No eDP BDB found but eDP panel " - "supported, assume %dbpp panel color " - "depth.\n", - dev_priv->edp.bpp); - } + if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) + DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n"); return; } @@ -658,9 +654,6 @@ init_vbt_defaults(struct drm_i915_private *dev_priv) dev_priv->lvds_use_ssc = 1; dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1); DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq); - - /* eDP data */ - dev_priv->edp.bpp = 18; } static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 15acb532b9de..0777c79478fb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3795,7 +3795,7 @@ static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc, /* Use VBT settings if we have an eDP panel */ unsigned int edp_bpc = dev_priv->edp.bpp / 3; - if (edp_bpc < display_bpc) { + if (edp_bpc && edp_bpc < display_bpc) { DRM_DEBUG_KMS("clamping display bpc (was %d) to eDP (%d)\n", display_bpc, edp_bpc); display_bpc = edp_bpc; } -- 2.39.5