drm: rcar-du: Stop accessing non-existent registers on gen4

The following registers do not exist on gen4, so we should not write them: DEF6Rm, DEF7Rm, DEF8Rm, ESCRn, OTARn. Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
mariux64 · Jan 23, 2023 · fd228eb · fd228eb
1 parent 5fbc2f3
commit fd228eb
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Showing 2 changed files with 19 additions and 13 deletions.
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -298,10 +298,12 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 		escr = params.escr;
 	}
 
-	dev_dbg(rcrtc->dev->dev, "%s: ESCR 0x%08x\n", __func__, escr);
+	if (rcdu->info->gen < 4) {
+		dev_dbg(rcrtc->dev->dev, "%s: ESCR 0x%08x\n", __func__, escr);
 
-	rcar_du_crtc_write(rcrtc, rcrtc->index % 2 ? ESCR13 : ESCR02, escr);
-	rcar_du_crtc_write(rcrtc, rcrtc->index % 2 ? OTAR13 : OTAR02, 0);
+		rcar_du_crtc_write(rcrtc, rcrtc->index % 2 ? ESCR13 : ESCR02, escr);
+		rcar_du_crtc_write(rcrtc, rcrtc->index % 2 ? OTAR13 : OTAR02, 0);
+	}
 
 	/* Signal polarities */
 	dsmr = ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? DSMR_VSL : 0)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -148,19 +148,23 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
 	}
 	rcar_du_group_write(rgrp, DEFR5, DEFR5_CODE | DEFR5_DEFE5);
 
-	rcar_du_group_setup_pins(rgrp);
+	if (rcdu->info->gen < 4)
+		rcar_du_group_setup_pins(rgrp);
 
-	/*
-	 * TODO: Handle routing of the DU output to CMM dynamically, as we
-	 * should bypass CMM completely when no color management feature is
-	 * used.
-	 */
-	defr7 |= (rgrp->cmms_mask & BIT(1) ? DEFR7_CMME1 : 0) |
-		 (rgrp->cmms_mask & BIT(0) ? DEFR7_CMME0 : 0);
-	rcar_du_group_write(rgrp, DEFR7, defr7);
+	if (rcdu->info->gen < 4) {
+		/*
+		 * TODO: Handle routing of the DU output to CMM dynamically, as
+		 * we should bypass CMM completely when no color management
+		 * feature is used.
+		 */
+		defr7 |= (rgrp->cmms_mask & BIT(1) ? DEFR7_CMME1 : 0) |
+			 (rgrp->cmms_mask & BIT(0) ? DEFR7_CMME0 : 0);
+		rcar_du_group_write(rgrp, DEFR7, defr7);
+	}
 
 	if (rcdu->info->gen >= 2) {
-		rcar_du_group_setup_defr8(rgrp);
+		if (rcdu->info->gen < 4)
+			rcar_du_group_setup_defr8(rgrp);
 		rcar_du_group_setup_didsr(rgrp);
 	}