[PATCH v2 5/9] drm: renesas: rz-du: Add RZ/G2UL DU Support

[Biju Das]

The LCD controller is composed of Frame Compression Processor (FCPVD),
Video Signal Processor (VSPD), and Display Unit (DU).

It has DPI interface and supports a maximum resolution of WXGA along
with 2 RPFs to support the blending of two picture layers and raster
operations (ROPs).

The DU module is connected to VSPD. Add RZ/G2UL DU support.

Signed-off-by: Biju Das <biju.das...@bp.renesas.com>
---
v1->v2:
 * No change.
---
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c |  9 ++++++++-
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c  | 11 +++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c 
b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c
index 6e7aac6219be..b1812f947252 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_crtc.c
@@ -28,6 +28,7 @@
 #include "rzg2l_du_vsp.h"
 
 #define DU_MCR0                        0x00
+#define DU_MCR0_DPI_OE         BIT(0)
 #define DU_MCR0_DI_EN          BIT(8)
 
 #define DU_DITR0               0x10
@@ -216,9 +217,15 @@ static void rzg2l_du_crtc_put(struct rzg2l_du_crtc *rcrtc)
 
 static void rzg2l_du_start_stop(struct rzg2l_du_crtc *rcrtc, bool start)
 {
+       struct rzg2l_du_crtc_state *rstate =
+                                       to_rzg2l_crtc_state(rcrtc->crtc.state);
        struct rzg2l_du_device *rcdu = rcrtc->dev;
+       u32 val = DU_MCR0_DI_EN;
 
-       writel(start ? DU_MCR0_DI_EN : 0, rcdu->mmio + DU_MCR0);
+       if (rstate->outputs == BIT(RZG2L_DU_OUTPUT_DPAD0))
+               val |= DU_MCR0_DPI_OE;
+
+       writel(start ? val : 0, rcdu->mmio + DU_MCR0);
 }
 
 static void rzg2l_du_crtc_start(struct rzg2l_du_crtc *rcrtc)
diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c 
b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
index e5eca8691a33..34534441b7ec 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c
@@ -25,6 +25,16 @@
  * Device Information
  */
 
+static const struct rzg2l_du_device_info rzg2l_du_r9a07g043u_info = {
+       .channels_mask = BIT(0),
+       .routes = {
+               [RZG2L_DU_OUTPUT_DPAD0] = {
+                       .possible_outputs = BIT(0),
+                       .port = 1,
+               },
+       },
+};
+
 static const struct rzg2l_du_device_info rzg2l_du_r9a07g044_info = {
        .channels_mask = BIT(0),
        .routes = {
@@ -40,6 +50,7 @@ static const struct rzg2l_du_device_info 
rzg2l_du_r9a07g044_info = {
 };
 
 static const struct of_device_id rzg2l_du_of_table[] = {
+       { .compatible = "renesas,r9a07g043u-du", .data = 
&rzg2l_du_r9a07g043u_info },
        { .compatible = "renesas,r9a07g044-du", .data = 
&rzg2l_du_r9a07g044_info },
        { /* sentinel */ }
 };
-- 
2.43.0