drm/rcar-du: Add support for DEFR8 register

The R8A7790 DU has a new extended function control register. Support it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

3 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 8694a4648860..f8785357b599 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -222,7 +222,8 @@ static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
-        .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_ALIGN_128B,
+        .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_ALIGN_128B
+                  | RCAR_DU_FEATURE_DEFR8,
         .num_crtcs = 3,
 };
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 160e5eb8f29d..70c335f51136 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -27,6 +27,7 @@ struct rcar_du_device;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK  (1 << 0)        /* Per-CRTC IRQ and clock */
 #define RCAR_DU_FEATURE_ALIGN_128B      (1 << 1)        /* Align pitches to 128 bytes */
+#define RCAR_DU_FEATURE_DEFR8           (1 << 2)        /* Has DEFR8 register */
 
 /*
  * struct rcar_du_device_info - DU model-specific information
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 0eb106efffc9..f3ba0ca845e2 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -51,6 +51,8 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
         rcar_du_group_write(rgrp, DEFR3, DEFR3_CODE | DEFR3_DEFE3);
         rcar_du_group_write(rgrp, DEFR4, DEFR4_CODE);
         rcar_du_group_write(rgrp, DEFR5, DEFR5_CODE | DEFR5_DEFE5);
+        if (rcar_du_has(rgrp->dev, RCAR_DU_FEATURE_DEFR8))
+                rcar_du_group_write(rgrp, DEFR8, DEFR8_CODE | DEFR8_DEFE8);
 
         /* Use DS1PR and DS2PR to configure planes priorities and connects the
          * superposition 0 to DU0 pins. DU1 pins will be configured dynamically.