Merge tag 'drm-intel-fixes-2022-09-01' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix for a null pointer dereference (Lukasz)
- HDMI related quirk for ECS Liva Q2 with GLK graphics (Diego)
- Skip wm/ddb readout for disabled pipes (Ville)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YxC3GmSOpDiZTdIJ@intel.com

Author: airlied

drivers/gpu/drm/i915/display/intel_bw.c

@@ -404,15 +404,17 @@ static int tgl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel
 		int clpchgroup;
 		int j;
 
-		if (i < num_groups - 1)
-			bi_next = &dev_priv->max_bw[i + 1];
-
 		clpchgroup = (sa->deburst * qi.deinterleave / num_channels) << i;
 
-		if (i < num_groups - 1 && clpchgroup < clperchgroup)
-			bi_next->num_planes = (ipqdepth - clpchgroup) / clpchgroup + 1;
-		else
-			bi_next->num_planes = 0;
+		if (i < num_groups - 1) {
+			bi_next = &dev_priv->max_bw[i + 1];
+
+			if (clpchgroup < clperchgroup)
+				bi_next->num_planes = (ipqdepth - clpchgroup) /
+						       clpchgroup + 1;
+			else
+				bi_next->num_planes = 0;
+		}
 
 		bi->num_qgv_points = qi.num_points;
 		bi->num_psf_gv_points = qi.num_psf_points;

drivers/gpu/drm/i915/display/intel_quirks.c

@@ -191,6 +191,9 @@ static struct intel_quirk intel_quirks[] = {
 	/* ASRock ITX*/
 	{ 0x3185, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
 	{ 0x3184, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
+	/* ECS Liva Q2 */
+	{ 0x3185, 0x1019, 0xa94d, quirk_increase_ddi_disabled_time },
+	{ 0x3184, 0x1019, 0xa94d, quirk_increase_ddi_disabled_time },
 };
 
 void intel_init_quirks(struct drm_i915_private *i915)

drivers/gpu/drm/i915/intel_pm.c

@@ -6561,7 +6561,10 @@ void skl_wm_get_hw_state(struct drm_i915_private *dev_priv)
 		enum plane_id plane_id;
 		u8 slices;
 
-		skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal);
+		memset(&crtc_state->wm.skl.optimal, 0,
+		       sizeof(crtc_state->wm.skl.optimal));
+		if (crtc_state->hw.active)
+			skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal);
 		crtc_state->wm.skl.raw = crtc_state->wm.skl.optimal;
 
 		memset(&dbuf_state->ddb[pipe], 0, sizeof(dbuf_state->ddb[pipe]));
@@ -6572,6 +6575,9 @@ void skl_wm_get_hw_state(struct drm_i915_private *dev_priv)
 			struct skl_ddb_entry *ddb_y =
 				&crtc_state->wm.skl.plane_ddb_y[plane_id];
 
+			if (!crtc_state->hw.active)
+				continue;
+
 			skl_ddb_get_hw_plane_state(dev_priv, crtc->pipe,
 						   plane_id, ddb, ddb_y);