drm/sun4i: frontend: Add support for the BGRX8888 input format

This introduces support for the BGRX8888 input format for the frontend,
with its associated pixel sequence value definition. Other fields are
already configured correctly as they no longer depend on the format's
fourcc directly.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181123092515.2511-22-paul.kocialkowski@bootlin.com

drivers/gpu/drm/sun4i/sun4i_frontend.c

@@ -129,6 +129,10 @@ static int sun4i_frontend_drm_format_to_input_mode(uint32_t fmt, u32 *val)
 static int sun4i_frontend_drm_format_to_input_sequence(uint32_t fmt, u32 *val)
 {
 	switch (fmt) {
+	case DRM_FORMAT_BGRX8888:
+		*val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_BGRX;
+		return 0;
+
 	case DRM_FORMAT_XRGB8888:
 		*val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_XRGB;
 		return 0;
@@ -151,6 +155,7 @@ static int sun4i_frontend_drm_format_to_output_fmt(uint32_t fmt, u32 *val)
 }
 
 static const uint32_t sun4i_frontend_formats[] = {
+	DRM_FORMAT_BGRX8888,
 	DRM_FORMAT_XRGB8888,
 };
 

drivers/gpu/drm/sun4i/sun4i_frontend.h

@@ -28,6 +28,7 @@
 #define SUN4I_FRONTEND_INPUT_FMT_REG		0x04c
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_PACKED	(1 << 8)
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_RGB		(5 << 4)
+#define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_BGRX		0
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_XRGB		1
 
 #define SUN4I_FRONTEND_OUTPUT_FMT_REG		0x05c

drivers/gpu/drm/sun4i/sun4i_layer.c

@@ -133,6 +133,7 @@ static const uint32_t sun4i_layer_formats[] = {
 	DRM_FORMAT_ARGB8888,
 	DRM_FORMAT_ARGB4444,
 	DRM_FORMAT_ARGB1555,
+	DRM_FORMAT_BGRX8888,
 	DRM_FORMAT_RGBA5551,
 	DRM_FORMAT_RGBA4444,
 	DRM_FORMAT_RGB888,