drm/i915: Read C0DRB3/C1DRB3 as 16 bits again
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Wed, 21 Apr 2021 15:33:59 +0000 (18:33 +0300)
committerJani Nikula <jani.nikula@intel.com>
Wed, 12 May 2021 17:52:32 +0000 (20:52 +0300)
We've defined C0DRB3/C1DRB3 as 16 bit registers, so access them
as such.

Fixes: 1c8242c3a4b2 ("drm/i915: Use unchecked writes for setting up the fences")
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210421153401.13847-3-ville.syrjala@linux.intel.com
(cherry picked from commit f765a5b48c667bdada5e49d5e0f23f8c0687b21b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c

index e72b7a0..8a32259 100644 (file)
@@ -653,8 +653,8 @@ static void detect_bit_6_swizzle(struct i915_ggtt *ggtt)
                 * banks of memory are paired and unswizzled on the
                 * uneven portion, so leave that as unknown.
                 */
-               if (intel_uncore_read(uncore, C0DRB3) ==
-                   intel_uncore_read(uncore, C1DRB3)) {
+               if (intel_uncore_read16(uncore, C0DRB3) ==
+                   intel_uncore_read16(uncore, C1DRB3)) {
                        swizzle_x = I915_BIT_6_SWIZZLE_9_10;
                        swizzle_y = I915_BIT_6_SWIZZLE_9;
                }