drm/i915: Fix watermark calculations for gen12+ RC CCS modifier

Take the gen12+ RC CCS modifier into account when calculating the
watermarks. Othwerwise we'll calculate the watermarks thinking this
Y-tiled modifier is linear.

The rc_surface part is actually a nop since that is not used
for any glk+ platform.

v2: Split RC CCS vs. MC CCS to separate patches

Cc: stable@vger.kernel.org
Fixes: b3e57bccd68a ("drm/i915/tgl: Gen-12 render decompression")
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221003111544.8007-2-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index 59e4fc6..6ce1213 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -1710,10 +1710,12 @@ skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
                      modifier == I915_FORMAT_MOD_4_TILED ||
                      modifier == I915_FORMAT_MOD_Yf_TILED ||
                      modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
-                     modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
+                     modifier == I915_FORMAT_MOD_Yf_TILED_CCS ||
+                     modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS;
        wp->x_tiled = modifier == I915_FORMAT_MOD_X_TILED;
        wp->rc_surface = modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
-                        modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
+                        modifier == I915_FORMAT_MOD_Yf_TILED_CCS ||
+                        modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS;
        wp->is_planar = intel_format_info_is_yuv_semiplanar(format, modifier);
 
        wp->width = width;