The R8A7790 DU variant has a single RGB output called DPAD0 that can be
fed with the output of DU0, DU1 or DU2. Making the routing configurable.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 5 ++++
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 ++
drivers/gpu/drm/rcar-du/rcar_du_group.c | 45 ++++++++++++++++++++++++++++++---
drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +-
4 files changed, 50 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 680606e..245800d 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -139,6 +139,11 @@ void rcar_du_crtc_route_output(struct drm_crtc *crtc,
* configured when starting the CRTC.
*/
rcrtc->outputs |= BIT(output);
+
+ /* Store RGB routing to DPAD0 for R8A7790. */
+ if (rcar_du_has(rcdu, RCAR_DU_FEATURE_DEFR8) &&
+ output == RCAR_DU_OUTPUT_DPAD0)
+ rcdu->dpad0_source = rcrtc->index;
}
void rcar_du_crtc_update_planes(struct drm_crtc *crtc)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index d5243f4..924f5e0 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -68,6 +68,8 @@ struct rcar_du_device {
unsigned int num_crtcs;
struct rcar_du_group groups[2];
+
+ unsigned int dpad0_source;
};
static inline bool rcar_du_has(struct rcar_du_device *rcdu,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 9df6fb6..eb53cd9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -27,6 +27,7 @@
* counterpart in the DU documentation, that models those semi-global resources.
*/
+#include <linux/clk.h>
#include <linux/io.h>
#include "rcar_du_drv.h"
@@ -43,6 +44,22 @@ void rcar_du_group_write(struct rcar_du_group *rgrp, u32 reg, u32 data)
rcar_du_write(rgrp->dev, rgrp->mmio_offset + reg, data);
}
+static void rcar_du_group_setup_defr8(struct rcar_du_group *rgrp)
+{
+ u32 defr8 = DEFR8_CODE | DEFR8_DEFE8;
+
+ if (!rcar_du_has(rgrp->dev, RCAR_DU_FEATURE_DEFR8))
+ return;
+
+ /* The DEFR8 register for the first group also controls RGB output
+ * routing to DPAD0
+ */
+ if (rgrp->index == 0)
+ defr8 |= DEFR8_DRGBS_DU(rgrp->dev->dpad0_source);
+
+ rcar_du_group_write(rgrp, DEFR8, defr8);
+}
+
static void rcar_du_group_setup(struct rcar_du_group *rgrp)
{
/* Enable extended features */
@@ -51,8 +68,8 @@ 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);
+
+ rcar_du_group_setup_defr8(rgrp);
/* Use DS1PR and DS2PR to configure planes priorities and connects the
* superposition 0 to DU0 pins. DU1 pins will be configured dynamically.
@@ -128,7 +145,27 @@ void rcar_du_group_restart(struct rcar_du_group *rgrp)
__rcar_du_group_start_stop(rgrp, true);
}
-void rcar_du_group_set_routing(struct rcar_du_group *rgrp)
+static int rcar_du_set_dpad0_routing(struct rcar_du_device *rcdu)
+{
+ int ret;
+
+ /* RGB output routing to DPAD0 is configured in the DEFR8 register of
+ * the first group. As this function can be called with the DU0 and DU1
+ * CRTCs disabled, we need to enable the first group clock before
+ * accessing the register.
+ */
+ ret = clk_prepare_enable(rcdu->crtcs[0].clock);
+ if (ret < 0)
+ return ret;
+
+ rcar_du_group_setup_defr8(&rcdu->groups[0]);
+
+ clk_disable_unprepare(rcdu->crtcs[0].clock);
+
+ return 0;
+}
+
+int rcar_du_group_set_routing(struct rcar_du_group *rgrp)
{
struct rcar_du_crtc *crtc0 = &rgrp->dev->crtcs[rgrp->index * 2];
u32 dorcr = rcar_du_group_read(rgrp, DORCR);
@@ -145,4 +182,6 @@ void rcar_du_group_set_routing(struct rcar_du_group *rgrp)
dorcr |= DORCR_PG2T | DORCR_DK2S | DORCR_PG2D_DS2;
rcar_du_group_write(rgrp, DORCR, dorcr);
+
+ return rcar_du_set_dpad0_routing(rgrp->dev);
}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h
index 4487e83..5025930 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h
@@ -45,6 +45,6 @@ int rcar_du_group_get(struct rcar_du_group *rgrp);
void rcar_du_group_put(struct rcar_du_group *rgrp);
void rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start);
void rcar_du_group_restart(struct rcar_du_group *rgrp);
-void rcar_du_group_set_routing(struct rcar_du_group *rgrp);
+int rcar_du_group_set_routing(struct rcar_du_group *rgrp);
#endif /* __RCAR_DU_GROUP_H__ */
--
1.8.1.5
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