From: Daniel Drake drake@endlessm.com
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 paulo.r.zanoni@intel.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Jani Nikula jani.nikula@linux.intel.com Cc: stable@vger.kernel.org # v4.11+ Reviewed-by: Paulo Zanoni paulo.r.zanoni@intel.com Signed-off-by: Daniel Drake drake@endlessm.com Signed-off-by: Jian-Hong Pan jian-hong@endlessm.com Signed-off-by: Jani Nikula jani.nikula@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20190423092810.28359-1-jian-ho... (cherry picked from commit 1d25724b41fad7eeb2c3058a5c8190d6ece73e08) Signed-off-by: Joonas Lahtinen joonas.lahtinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/i915/intel_fbc.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -1278,6 +1278,10 @@ static int intel_sanitize_fbc_option(str 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;