drm/sun4i: rgb: Pass tcon pointer when initializing RGB encoder

The RGB encoder represents channel 0 of the TCON. Instead of fetching
the pointer to its TCON from the main sun4i_drv structure, pass it in
as part of the init call, save it, and use it directly in the encoder
and connector callbacks.

We can also drop the otherwise unused sun4i_drv pointer.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

drivers/gpu/drm/sun4i/sun4i_rgb.c

@@ -18,7 +18,6 @@
 #include <drm/drm_panel.h>
 
 #include "sun4i_crtc.h"
-#include "sun4i_drv.h"
 #include "sun4i_tcon.h"
 #include "sun4i_rgb.h"
 
@@ -26,7 +25,7 @@ struct sun4i_rgb {
 	struct drm_connector	connector;
 	struct drm_encoder	encoder;
 
-	struct sun4i_drv	*drv;
+	struct sun4i_tcon	*tcon;
 };
 
 static inline struct sun4i_rgb *
@@ -47,8 +46,7 @@ static int sun4i_rgb_get_modes(struct drm_connector *connector)
 {
 	struct sun4i_rgb *rgb =
 		drm_connector_to_sun4i_rgb(connector);
-	struct sun4i_drv *drv = rgb->drv;
-	struct sun4i_tcon *tcon = drv->tcon;
+	struct sun4i_tcon *tcon = rgb->tcon;
 
 	return drm_panel_get_modes(tcon->panel);
 }
@@ -57,8 +55,7 @@ static int sun4i_rgb_mode_valid(struct drm_connector *connector,
 				struct drm_display_mode *mode)
 {
 	struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector);
-	struct sun4i_drv *drv = rgb->drv;
-	struct sun4i_tcon *tcon = drv->tcon;
+	struct sun4i_tcon *tcon = rgb->tcon;
 	u32 hsync = mode->hsync_end - mode->hsync_start;
 	u32 vsync = mode->vsync_end - mode->vsync_start;
 	unsigned long rate = mode->clock * 1000;
@@ -115,8 +112,7 @@ static void
 sun4i_rgb_connector_destroy(struct drm_connector *connector)
 {
 	struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector);
-	struct sun4i_drv *drv = rgb->drv;
-	struct sun4i_tcon *tcon = drv->tcon;
+	struct sun4i_tcon *tcon = rgb->tcon;
 
 	drm_panel_detach(tcon->panel);
 	drm_connector_cleanup(connector);
@@ -141,8 +137,7 @@ static int sun4i_rgb_atomic_check(struct drm_encoder *encoder,
 static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder)
 {
 	struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
-	struct sun4i_drv *drv = rgb->drv;
-	struct sun4i_tcon *tcon = drv->tcon;
+	struct sun4i_tcon *tcon = rgb->tcon;
 
 	DRM_DEBUG_DRIVER("Enabling RGB output\n");
 
@@ -158,8 +153,7 @@ static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder)
 static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder)
 {
 	struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
-	struct sun4i_drv *drv = rgb->drv;
-	struct sun4i_tcon *tcon = drv->tcon;
+	struct sun4i_tcon *tcon = rgb->tcon;
 
 	DRM_DEBUG_DRIVER("Disabling RGB output\n");
 
@@ -177,8 +171,7 @@ static void sun4i_rgb_encoder_mode_set(struct drm_encoder *encoder,
 				       struct drm_display_mode *adjusted_mode)
 {
 	struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
-	struct sun4i_drv *drv = rgb->drv;
-	struct sun4i_tcon *tcon = drv->tcon;
+	struct sun4i_tcon *tcon = rgb->tcon;
 
 	sun4i_tcon0_mode_set(tcon, mode);
 
@@ -204,10 +197,8 @@ static struct drm_encoder_funcs sun4i_rgb_enc_funcs = {
 	.destroy	= sun4i_rgb_enc_destroy,
 };
 
-int sun4i_rgb_init(struct drm_device *drm)
+int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon)
 {
-	struct sun4i_drv *drv = drm->dev_private;
-	struct sun4i_tcon *tcon = drv->tcon;
 	struct drm_encoder *encoder;
 	struct drm_bridge *bridge;
 	struct sun4i_rgb *rgb;
@@ -216,7 +207,7 @@ int sun4i_rgb_init(struct drm_device *drm)
 	rgb = devm_kzalloc(drm->dev, sizeof(*rgb), GFP_KERNEL);
 	if (!rgb)
 		return -ENOMEM;
-	rgb->drv = drv;
+	rgb->tcon = tcon;
 	encoder = &rgb->encoder;
 
 	tcon->panel = sun4i_tcon_find_panel(tcon->dev->of_node);

drivers/gpu/drm/sun4i/sun4i_rgb.h

@@ -13,6 +13,6 @@
 #ifndef _SUN4I_RGB_H_
 #define _SUN4I_RGB_H_
 
-int sun4i_rgb_init(struct drm_device *drm);
+int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon);
 
 #endif /* _SUN4I_RGB_H_ */

drivers/gpu/drm/sun4i/sun4i_tcon.c

@@ -530,7 +530,7 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 		goto err_free_clocks;
 	}
 
-	ret = sun4i_rgb_init(drm);
+	ret = sun4i_rgb_init(drm, tcon);
 	if (ret < 0)
 		goto err_free_clocks;