linux-kernel - [PATCH 5.19 171/717] drm/i915: Fix watermark calculations for DG2 CCS modifiers

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Date:   Sat, 22 Oct 2022 09:20:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Juha-Pekka Heikkila <juhapekka.heikkila@...il.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Subject: [PATCH 5.19 171/717] drm/i915: Fix watermark calculations for DG2 CCS modifiers

From: Ville Syrjälä <ville.syrjala@...ux.intel.com>

commit ccfa6d35f9233702c924316cdf40c05b6ce88113 upstream.

Take the DG2 CCS modifiers into account when calculating the
watermarks. Othwerwise we'll calculate the watermarks thinking these
tile-4 modifiers are linear.

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

Cc: stable@...r.kernel.org
Fixes: 4c3afa72138c ("drm/i915/dg2: Add support for DG2 render and media compression")
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@...il.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221003111544.8007-5-ville.syrjala@linux.intel.com
(cherry picked from commit f25d9f81a8e09ace4f04106995550bae1f522143)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/i915/intel_pm.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5310,13 +5310,17 @@ skl_compute_wm_params(const struct intel
 		      modifier == I915_FORMAT_MOD_Yf_TILED_CCS ||
 		      modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS ||
 		      modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS ||
-		      modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC;
+		      modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC ||
+		      modifier == I915_FORMAT_MOD_4_TILED_DG2_RC_CCS ||
+		      modifier == I915_FORMAT_MOD_4_TILED_DG2_MC_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_Y_TILED_GEN12_RC_CCS ||
 			 modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS ||
-			 modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC;
+			 modifier == I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC ||
+			 modifier == I915_FORMAT_MOD_4_TILED_DG2_RC_CCS ||
+			 modifier == I915_FORMAT_MOD_4_TILED_DG2_MC_CCS;
 	wp->is_planar = intel_format_info_is_yuv_semiplanar(format, modifier);
 
 	wp->width = width;