From 360e00e290a355219425b5ea0ca62d9df3261fa1 Mon Sep 17 00:00:00 2001 From: Daniel Drake Date: Tue, 23 Apr 2019 17:28:10 +0800 Subject: [PATCH] drm/i915/fbc: disable framebuffer compression on GeminiLake commit 396dd8143bdd94bd1c358a228a631c8c895a1126 upstream. On many (all?) the Gemini Lake systems we work with, there is frequent momentary graphical corruption at the top of the screen, and it seems that disabling framebuffer compression can avoid this. The ticket was reported 6 months ago and has already affected a multitude of users, without any real progress being made. So, lets disable framebuffer compression on GeminiLake until a solution is found. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108085 Fixes: fd7d6c5c8f3e ("drm/i915: enable FBC on gen9+ too") Cc: Paulo Zanoni Cc: Daniel Vetter Cc: Jani Nikula Cc: # v4.11+ Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Drake Signed-off-by: Jian-Hong Pan Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20190423092810.28359-1-jian-hong@endlessm.com (cherry picked from commit 1d25724b41fad7eeb2c3058a5c8190d6ece73e08) Signed-off-by: Joonas Lahtinen Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_fbc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 01d1d20..728a20e 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -1267,6 +1267,10 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv) if (!HAS_FBC(dev_priv)) return 0; + /* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */ + if (IS_GEMINILAKE(dev_priv)) + return 0; + if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9) return 1; -- 2.7.4