drm/i915: Restore lost glk FBC 16bpp w/a

We lost the FBC 16bpp 512byte stride requirement on glk when
we switched from display version 9 to 10. Restore the w/a to
avoid enabling FBC with a bad stride and thus display garbage.

Cc: Matt Roper <matthew.d.roper@intel.com>
Fixes: 2b5a4562edd0 ("drm/i915/display: Simplify GLK display version tests")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210412054607.18133-2-ville.syrjala@linux.intel.com
(cherry picked from commit 87b8c3bc8d27270c9abd5e895ea9066e918ef89b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 986bbbe3b12fdf1fd36584a0adeb2dc0e294c920..957252b695d70d8d29b0fb0dc9d3e0550579c597 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -597,7 +597,7 @@ static bool stride_is_valid(struct drm_i915_private *dev_priv,
                return false;
 
        /* Display WA #1105: skl,bxt,kbl,cfl,glk */
-       if (IS_DISPLAY_VER(dev_priv, 9) &&
+       if ((IS_DISPLAY_VER(dev_priv, 9) || IS_GEMINILAKE(dev_priv)) &&
            modifier == DRM_FORMAT_MOD_LINEAR && stride & 511)
                return false;