drm/rcar-du: Merge LVDS and VGA encoder code

Create a single rcar_du_encoder structure that implements a KMS encoder.
The current implementation is straightforward and only configures CRTC
output routing.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

drivers/gpu/drm/rcar-du/Makefile

 rcar-du-drm-y := rcar_du_crtc.o \
 		 rcar_du_drv.o \
+		 rcar_du_encoder.o \
 		 rcar_du_kms.o \
-		 rcar_du_lvds.o \
 		 rcar_du_lvdscon.o \
 		 rcar_du_plane.o \
-		 rcar_du_vga.o \
 		 rcar_du_vgacon.o
 
 obj-$(CONFIG_DRM_RCAR_DU)	+= rcar-du-drm.o

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

@@ -23,10 +23,8 @@
 #include "rcar_du_crtc.h"
 #include "rcar_du_drv.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvds.h"
 #include "rcar_du_plane.h"
 #include "rcar_du_regs.h"
-#include "rcar_du_vga.h"
 
 #define to_rcar_crtc(c)	container_of(c, struct rcar_du_crtc, crtc)
 

drivers/gpu/drm/rcar-du/rcar_du_lvds.c → drivers/gpu/drm/rcar-du/rcar_du_encoder.c

 /*
- * rcar_du_lvds.c  --  R-Car Display Unit LVDS Encoder
+ * rcar_du_encoder.c  --  R-Car Display Unit Encoder
  *
  * Copyright (C) 2013 Renesas Corporation
  *
@@ -16,15 +16,32 @@
 #include <drm/drm_crtc_helper.h>
 
 #include "rcar_du_drv.h"
+#include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvds.h"
 #include "rcar_du_lvdscon.h"
+#include "rcar_du_vgacon.h"
 
-static void rcar_du_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
+/* -----------------------------------------------------------------------------
+ * Common connector functions
+ */
+
+struct drm_encoder *
+rcar_du_connector_best_encoder(struct drm_connector *connector)
+{
+	struct rcar_du_connector *rcon = to_rcar_connector(connector);
+
+	return &rcon->encoder->encoder;
+}
+
+/* -----------------------------------------------------------------------------
+ * Encoder
+ */
+
+static void rcar_du_encoder_dpms(struct drm_encoder *encoder, int mode)
 {
 }
 
-static bool rcar_du_lvds_encoder_mode_fixup(struct drm_encoder *encoder,
+static bool rcar_du_encoder_mode_fixup(struct drm_encoder *encoder,
 				       const struct drm_display_mode *mode,
 				       struct drm_display_mode *adjusted_mode)
 {
@@ -33,6 +50,10 @@ static bool rcar_du_lvds_encoder_mode_fixup(struct drm_encoder *encoder,
 	struct drm_connector *connector;
 	bool found = false;
 
+	/* DAC encoders have currently no restriction on the mode. */
+	if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
+		return true;
+
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		if (connector->encoder == encoder) {
 			found = true;
@@ -64,9 +85,26 @@ static bool rcar_du_lvds_encoder_mode_fixup(struct drm_encoder *encoder,
 	return true;
 }
 
+static void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder)
+{
+}
+
+static void rcar_du_encoder_mode_commit(struct drm_encoder *encoder)
+{
+}
+
+static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
+				     struct drm_display_mode *mode,
+				     struct drm_display_mode *adjusted_mode)
+{
+	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
+
+	rcar_du_crtc_route_output(encoder->crtc, renc->output);
+}
+
 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
-	.dpms = rcar_du_lvds_encoder_dpms,
-	.mode_fixup = rcar_du_lvds_encoder_mode_fixup,
+	.dpms = rcar_du_encoder_dpms,
+	.mode_fixup = rcar_du_encoder_mode_fixup,
 	.prepare = rcar_du_encoder_mode_prepare,
 	.commit = rcar_du_encoder_mode_commit,
 	.mode_set = rcar_du_encoder_mode_set,
@@ -76,9 +114,9 @@ static const struct drm_encoder_funcs encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
 
-int rcar_du_lvds_init(struct rcar_du_device *rcdu,
-		      const struct rcar_du_encoder_lvds_data *data,
-		      unsigned int output)
+int rcar_du_encoder_init(struct rcar_du_device *rcdu,
+			 enum rcar_du_encoder_type type, unsigned int output,
+			 const struct rcar_du_encoder_data *data)
 {
 	struct rcar_du_encoder *renc;
 	int ret;
@@ -90,11 +128,21 @@ int rcar_du_lvds_init(struct rcar_du_device *rcdu,
 	renc->output = output;
 
 	ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
-			       DRM_MODE_ENCODER_LVDS);
+			       type);
 	if (ret < 0)
 		return ret;
 
 	drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
 
-	return rcar_du_lvds_connector_init(rcdu, renc, &data->panel);
+	switch (type) {
+	case RCAR_DU_ENCODER_LVDS:
+		return rcar_du_lvds_connector_init(rcdu, renc,
+						   &data->u.lvds.panel);
+
+	case RCAR_DU_ENCODER_VGA:
+		return rcar_du_vga_connector_init(rcdu, renc);
+
+	default:
+		return -EINVAL;
+	}
 }

drivers/gpu/drm/rcar-du/rcar_du_lvds.h → drivers/gpu/drm/rcar-du/rcar_du_encoder.h

 /*
- * rcar_du_lvds.h  --  R-Car Display Unit LVDS Encoder and Connector
+ * rcar_du_encoder.h  --  R-Car Display Unit Encoder
  *
  * Copyright (C) 2013 Renesas Corporation
  *
@@ -11,14 +11,35 @@
  * (at your option) any later version.
  */
 
-#ifndef __RCAR_DU_LVDS_H__
-#define __RCAR_DU_LVDS_H__
+#ifndef __RCAR_DU_ENCODER_H__
+#define __RCAR_DU_ENCODER_H__
+
+#include <drm/drm_crtc.h>
 
 struct rcar_du_device;
-struct rcar_du_encoder_lvds_data;
+struct rcar_du_encoder_data;
+
+struct rcar_du_encoder {
+	struct drm_encoder encoder;
+	unsigned int output;
+};
+
+#define to_rcar_encoder(e) \
+	container_of(e, struct rcar_du_encoder, encoder)
+
+struct rcar_du_connector {
+	struct drm_connector connector;
+	struct rcar_du_encoder *encoder;
+};
+
+#define to_rcar_connector(c) \
+	container_of(c, struct rcar_du_connector, connector)
+
+struct drm_encoder *
+rcar_du_connector_best_encoder(struct drm_connector *connector);
 
-int rcar_du_lvds_init(struct rcar_du_device *rcdu,
-		      const struct rcar_du_encoder_lvds_data *data,
-		      unsigned int output);
+int rcar_du_encoder_init(struct rcar_du_device *rcdu,
+			 enum rcar_du_encoder_type type, unsigned int output,
+			 const struct rcar_du_encoder_data *data);
 
-#endif /* __RCAR_DU_LVDS_H__ */
+#endif /* __RCAR_DU_ENCODER_H__ */

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

@@ -19,10 +19,9 @@
 
 #include "rcar_du_crtc.h"
 #include "rcar_du_drv.h"
+#include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvds.h"
 #include "rcar_du_regs.h"
-#include "rcar_du_vga.h"
 
 /* -----------------------------------------------------------------------------
  * Format helpers
@@ -105,35 +104,6 @@ const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
 	return NULL;
 }
 
-/* -----------------------------------------------------------------------------
- * Common connector and encoder functions
- */
-
-struct drm_encoder *
-rcar_du_connector_best_encoder(struct drm_connector *connector)
-{
-	struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
-	return &rcon->encoder->encoder;
-}
-
-void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder)
-{
-}
-
-void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
-			      struct drm_display_mode *mode,
-			      struct drm_display_mode *adjusted_mode)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
-	rcar_du_crtc_route_output(encoder->crtc, renc->output);
-}
-
-void rcar_du_encoder_mode_commit(struct drm_encoder *encoder)
-{
-}
-
 /* -----------------------------------------------------------------------------
  * Frame buffer
  */
@@ -221,6 +191,9 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 		const struct rcar_du_encoder_data *pdata =
 			&rcdu->pdata->encoders[i];
 
+		if (pdata->encoder == RCAR_DU_ENCODER_UNUSED)
+			continue;
+
 		if (pdata->output >= ARRAY_SIZE(rcdu->crtcs)) {
 			dev_warn(rcdu->dev,
 				 "encoder %u references unexisting output %u, skipping\n",
@@ -228,18 +201,8 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 			continue;
 		}
 
-		switch (pdata->encoder) {
-		case RCAR_DU_ENCODER_VGA:
-			rcar_du_vga_init(rcdu, &pdata->u.vga, pdata->output);
-			break;
-
-		case RCAR_DU_ENCODER_LVDS:
-			rcar_du_lvds_init(rcdu, &pdata->u.lvds, pdata->output);
-			break;
-
-		default:
-			break;
-		}
+		rcar_du_encoder_init(rcdu, pdata->encoder, pdata->output,
+				     pdata);
 	}
 
 	/* Set the possible CRTCs and possible clones. All encoders can be

drivers/gpu/drm/rcar-du/rcar_du_kms.h

@@ -16,8 +16,9 @@
 
 #include <linux/types.h>
 
-#include <drm/drm_crtc.h>
-
+struct drm_file;
+struct drm_device;
+struct drm_mode_create_dumb;
 struct rcar_du_device;
 
 struct rcar_du_format_info {
@@ -28,32 +29,8 @@ struct rcar_du_format_info {
 	unsigned int edf;
 };
 
-struct rcar_du_encoder {
-	struct drm_encoder encoder;
-	unsigned int output;
-};
-
-#define to_rcar_encoder(e) \
-	container_of(e, struct rcar_du_encoder, encoder)
-
-struct rcar_du_connector {
-	struct drm_connector connector;
-	struct rcar_du_encoder *encoder;
-};
-
-#define to_rcar_connector(c) \
-	container_of(c, struct rcar_du_connector, connector)
-
 const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc);
 
-struct drm_encoder *
-rcar_du_connector_best_encoder(struct drm_connector *connector);
-void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder);
-void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
-			      struct drm_display_mode *mode,
-			      struct drm_display_mode *adjusted_mode);
-void rcar_du_encoder_mode_commit(struct drm_encoder *encoder);
-
 int rcar_du_modeset_init(struct rcar_du_device *rcdu);
 
 int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,

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

@@ -16,6 +16,7 @@
 #include <drm/drm_crtc_helper.h>
 
 #include "rcar_du_drv.h"
+#include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
 #include "rcar_du_lvdscon.h"
 

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

-/*
- * rcar_du_vga.c  --  R-Car Display Unit VGA DAC
- *
- * Copyright (C) 2013 Renesas Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <drm/drmP.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_crtc_helper.h>
-
-#include "rcar_du_drv.h"
-#include "rcar_du_kms.h"
-#include "rcar_du_vga.h"
-#include "rcar_du_vgacon.h"
-
-static void rcar_du_vga_encoder_dpms(struct drm_encoder *encoder, int mode)
-{
-}
-
-static bool rcar_du_vga_encoder_mode_fixup(struct drm_encoder *encoder,
-					   const struct drm_display_mode *mode,
-					   struct drm_display_mode *adjusted_mode)
-{
-	return true;
-}
-
-static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
-	.dpms = rcar_du_vga_encoder_dpms,
-	.mode_fixup = rcar_du_vga_encoder_mode_fixup,
-	.prepare = rcar_du_encoder_mode_prepare,
-	.commit = rcar_du_encoder_mode_commit,
-	.mode_set = rcar_du_encoder_mode_set,
-};
-
-static const struct drm_encoder_funcs encoder_funcs = {
-	.destroy = drm_encoder_cleanup,
-};
-
-int rcar_du_vga_init(struct rcar_du_device *rcdu,
-		     const struct rcar_du_encoder_vga_data *data,
-		     unsigned int output)
-{
-	struct rcar_du_encoder *renc;
-	int ret;
-
-	renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
-	if (renc == NULL)
-		return -ENOMEM;
-
-	renc->output = output;
-
-	ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
-			       DRM_MODE_ENCODER_DAC);
-	if (ret < 0)
-		return ret;
-
-	drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
-
-	return rcar_du_vga_connector_init(rcdu, renc);
-}

drivers/gpu/drm/rcar-du/rcar_du_vga.h

-/*
- * rcar_du_vga.h  --  R-Car Display Unit VGA DAC
- *
- * Copyright (C) 2013 Renesas Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_VGA_H__
-#define __RCAR_DU_VGA_H__
-
-struct rcar_du_device;
-struct rcar_du_encoder_vga_data;
-
-int rcar_du_vga_init(struct rcar_du_device *rcdu,
-		     const struct rcar_du_encoder_vga_data *data,
-		     unsigned int output);
-
-#endif /* __RCAR_DU_VGA_H__ */

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

@@ -16,6 +16,7 @@
 #include <drm/drm_crtc_helper.h>
 
 #include "rcar_du_drv.h"
+#include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
 #include "rcar_du_vgacon.h"