Merge tag 'du-next-20211206' of git://linuxtv.org/pinchartl/media into drm-next

R-Car DU updates:

- DSI output support
- Misc fixes

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

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Ya4/MCeuNf601tL4@pendragon.ideasonboard.com

Author: airlied

Documentation/devicetree/bindings/display/bridge/renesas,dsi-csi2-tx.yaml

@@ -0,0 +1,118 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/renesas,dsi-csi2-tx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car MIPI DSI/CSI-2 Encoder
+
+maintainers:
+  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+
+description: |
+  This binding describes the MIPI DSI/CSI-2 encoder embedded in the Renesas
+  R-Car V3U SoC. The encoder can operate in either DSI or CSI-2 mode, with up
+  to four data lanes.
+
+properties:
+  compatible:
+    enum:
+      - renesas,r8a779a0-dsi-csi2-tx    # for V3U
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Functional clock
+      - description: DSI (and CSI-2) functional clock
+      - description: PLL reference clock
+
+  clock-names:
+    items:
+      - const: fck
+      - const: dsi
+      - const: pll
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Parallel input port
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: DSI/CSI-2 output port
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+
+            required:
+              - data-lanes
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - power-domains
+  - resets
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a779a0-cpg-mssr.h>
+    #include <dt-bindings/power/r8a779a0-sysc.h>
+
+    dsi0: dsi-encoder@fed80000 {
+        compatible = "renesas,r8a779a0-dsi-csi2-tx";
+        reg = <0xfed80000 0x10000>;
+        power-domains = <&sysc R8A779A0_PD_ALWAYS_ON>;
+        clocks = <&cpg CPG_MOD 415>,
+                 <&cpg CPG_CORE R8A779A0_CLK_DSI>,
+                 <&cpg CPG_CORE R8A779A0_CLK_CP>;
+        clock-names = "fck", "dsi", "pll";
+        resets = <&cpg 415>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+                dsi0_in: endpoint {
+                    remote-endpoint = <&du_out_dsi0>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+                dsi0_out: endpoint {
+                    data-lanes = <1 2>;
+                    remote-endpoint = <&sn65dsi86_in>;
+                };
+            };
+        };
+    };
+...

MAINTAINERS

@@ -6414,6 +6414,7 @@ L:	dri-devel@lists.freedesktop.org
 L:	linux-renesas-soc@vger.kernel.org
 S:	Supported
 T:	git git://linuxtv.org/pinchartl/media drm/du/next
+F:	Documentation/devicetree/bindings/display/bridge/renesas,dsi-csi2-tx.yaml
 F:	Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
 F:	Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml
 F:	Documentation/devicetree/bindings/display/renesas,du.yaml

drivers/gpu/drm/rcar-du/Kconfig

@@ -4,8 +4,6 @@ config DRM_RCAR_DU
 	depends on DRM && OF
 	depends on ARM || ARM64
 	depends on ARCH_RENESAS || COMPILE_TEST
-	imply DRM_RCAR_CMM
-	imply DRM_RCAR_LVDS
 	select DRM_KMS_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_GEM_CMA_HELPER
@@ -14,29 +12,45 @@ config DRM_RCAR_DU
 	  Choose this option if you have an R-Car chipset.
 	  If M is selected the module will be called rcar-du-drm.
 
-config DRM_RCAR_CMM
-	tristate "R-Car DU Color Management Module (CMM) Support"
-	depends on DRM && OF
+config DRM_RCAR_USE_CMM
+	bool "R-Car DU Color Management Module (CMM) Support"
 	depends on DRM_RCAR_DU
+	default DRM_RCAR_DU
 	help
 	  Enable support for R-Car Color Management Module (CMM).
 
+config DRM_RCAR_CMM
+	def_tristate DRM_RCAR_DU
+	depends on DRM_RCAR_USE_CMM
+
 config DRM_RCAR_DW_HDMI
 	tristate "R-Car Gen3 and RZ/G2 DU HDMI Encoder Support"
 	depends on DRM && OF
 	select DRM_DW_HDMI
 	help
 	  Enable support for R-Car Gen3 or RZ/G2 internal HDMI encoder.
 
+config DRM_RCAR_USE_LVDS
+	bool "R-Car DU LVDS Encoder Support"
+	depends on DRM_BRIDGE && OF
+	default DRM_RCAR_DU
+	help
+	  Enable support for the R-Car Display Unit embedded LVDS encoders.
+
 config DRM_RCAR_LVDS
-	tristate "R-Car DU LVDS Encoder Support"
-	depends on DRM && DRM_BRIDGE && OF
+	def_tristate DRM_RCAR_DU
+	depends on DRM_RCAR_USE_LVDS
 	select DRM_KMS_HELPER
 	select DRM_PANEL
 	select OF_FLATTREE
 	select OF_OVERLAY
+
+config DRM_RCAR_MIPI_DSI
+	tristate "R-Car DU MIPI DSI Encoder Support"
+	depends on DRM && DRM_BRIDGE && OF
+	select DRM_MIPI_DSI
 	help
-	  Enable support for the R-Car Display Unit embedded LVDS encoders.
+	  Enable support for the R-Car Display Unit embedded MIPI DSI encoders.
 
 config DRM_RCAR_VSP
 	bool "R-Car DU VSP Compositor Support" if ARM

drivers/gpu/drm/rcar-du/Makefile

@@ -19,6 +19,7 @@ obj-$(CONFIG_DRM_RCAR_CMM)		+= rcar_cmm.o
 obj-$(CONFIG_DRM_RCAR_DU)		+= rcar-du-drm.o
 obj-$(CONFIG_DRM_RCAR_DW_HDMI)		+= rcar_dw_hdmi.o
 obj-$(CONFIG_DRM_RCAR_LVDS)		+= rcar_lvds.o
+obj-$(CONFIG_DRM_RCAR_MIPI_DSI)		+= rcar_mipi_dsi.o
 
 # 'remote-endpoint' is fixed up at run-time
 DTC_FLAGS_rcar_du_of_lvds_r8a7790 += -Wno-graph_endpoint

drivers/gpu/drm/rcar-du/rcar_du_crtc.c

@@ -215,6 +215,7 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 	const struct drm_display_mode *mode = &rcrtc->crtc.state->adjusted_mode;
 	struct rcar_du_device *rcdu = rcrtc->dev;
 	unsigned long mode_clock = mode->clock * 1000;
+	unsigned int hdse_offset;
 	u32 dsmr;
 	u32 escr;
 
@@ -261,12 +262,13 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 		rcar_du_group_write(rcrtc->group, DPLLCR, dpllcr);
 
 		escr = ESCR_DCLKSEL_DCLKIN | div;
-	} else if (rcdu->info->lvds_clk_mask & BIT(rcrtc->index)) {
+	} else if (rcdu->info->lvds_clk_mask & BIT(rcrtc->index) ||
+		   rcdu->info->dsi_clk_mask & BIT(rcrtc->index)) {
 		/*
-		 * Use the LVDS PLL output as the dot clock when outputting to
-		 * the LVDS encoder on an SoC that supports this clock routing
-		 * option. We use the clock directly in that case, without any
-		 * additional divider.
+		 * Use the external LVDS or DSI PLL output as the dot clock when
+		 * outputting to the LVDS or DSI encoder on an SoC that supports
+		 * this clock routing option. We use the clock directly in that
+		 * case, without any additional divider.
 		 */
 		escr = ESCR_DCLKSEL_DCLKIN;
 	} else {
@@ -298,10 +300,15 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 	     | DSMR_DIPM_DISP | DSMR_CSPM;
 	rcar_du_crtc_write(rcrtc, DSMR, dsmr);
 
+	hdse_offset = 19;
+	if (rcrtc->group->cmms_mask & BIT(rcrtc->index % 2))
+		hdse_offset += 25;
+
 	/* Display timings */
-	rcar_du_crtc_write(rcrtc, HDSR, mode->htotal - mode->hsync_start - 19);
+	rcar_du_crtc_write(rcrtc, HDSR, mode->htotal - mode->hsync_start -
+					hdse_offset);
 	rcar_du_crtc_write(rcrtc, HDER, mode->htotal - mode->hsync_start +
-					mode->hdisplay - 19);
+					mode->hdisplay - hdse_offset);
 	rcar_du_crtc_write(rcrtc, HSWR, mode->hsync_end -
 					mode->hsync_start - 1);
 	rcar_du_crtc_write(rcrtc, HCR,  mode->htotal - 1);
@@ -836,16 +843,22 @@ rcar_du_crtc_mode_valid(struct drm_crtc *crtc,
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 	struct rcar_du_device *rcdu = rcrtc->dev;
 	bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
+	unsigned int min_sync_porch;
 	unsigned int vbp;
 
 	if (interlaced && !rcar_du_has(rcdu, RCAR_DU_FEATURE_INTERLACED))
 		return MODE_NO_INTERLACE;
 
 	/*
 	 * The hardware requires a minimum combined horizontal sync and back
-	 * porch of 20 pixels and a minimum vertical back porch of 3 lines.
+	 * porch of 20 pixels (when CMM isn't used) or 45 pixels (when CMM is
+	 * used), and a minimum vertical back porch of 3 lines.
 	 */
-	if (mode->htotal - mode->hsync_start < 20)
+	min_sync_porch = 20;
+	if (rcrtc->group->cmms_mask & BIT(rcrtc->index % 2))
+		min_sync_porch += 25;
+
+	if (mode->htotal - mode->hsync_start < min_sync_porch)
 		return MODE_HBLANK_NARROW;
 
 	vbp = (mode->vtotal - mode->vsync_end) / (interlaced ? 2 : 1);

drivers/gpu/drm/rcar-du/rcar_du_drv.c

@@ -544,10 +544,12 @@ const char *rcar_du_output_name(enum rcar_du_output output)
 	static const char * const names[] = {
 		[RCAR_DU_OUTPUT_DPAD0] = "DPAD0",
 		[RCAR_DU_OUTPUT_DPAD1] = "DPAD1",
-		[RCAR_DU_OUTPUT_LVDS0] = "LVDS0",
-		[RCAR_DU_OUTPUT_LVDS1] = "LVDS1",
+		[RCAR_DU_OUTPUT_DSI0] = "DSI0",
+		[RCAR_DU_OUTPUT_DSI1] = "DSI1",
 		[RCAR_DU_OUTPUT_HDMI0] = "HDMI0",
 		[RCAR_DU_OUTPUT_HDMI1] = "HDMI1",
+		[RCAR_DU_OUTPUT_LVDS0] = "LVDS0",
+		[RCAR_DU_OUTPUT_LVDS1] = "LVDS1",
 		[RCAR_DU_OUTPUT_TCON] = "TCON",
 	};