[PATCH v2 5/7] drm/gud: Add GUD_PIXEL_FORMAT_RGB332

[Noralf Trønnes <noralf@xxxxxxxxxxx>]

Add support for the RGB332 pixel format.

Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
---
 drivers/gpu/drm/gud/gud_drv.c      | 2 ++
 drivers/gpu/drm/gud/gud_internal.h | 4 ++++
 drivers/gpu/drm/gud/gud_pipe.c     | 2 ++
 include/drm/gud.h                  | 1 +
 4 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/gud/gud_drv.c b/drivers/gpu/drm/gud/gud_drv.c
index a8d76c76e868..e571ad10a12b 100644
--- a/drivers/gpu/drm/gud/gud_drv.c
+++ b/drivers/gpu/drm/gud/gud_drv.c
@@ -526,6 +526,8 @@ static int gud_probe(struct usb_interface *intf, const struct usb_device_id *id)
 		case DRM_FORMAT_R8:
 			fallthrough;
 		case GUD_DRM_FORMAT_XRGB1111:
+			fallthrough;
+		case DRM_FORMAT_RGB332:
 			if (!xrgb8888_emulation_format)
 				xrgb8888_emulation_format = info;
 			break;
diff --git a/drivers/gpu/drm/gud/gud_internal.h b/drivers/gpu/drm/gud/gud_internal.h
index 8499e713dbbc..249e02d1f5ed 100644
--- a/drivers/gpu/drm/gud/gud_internal.h
+++ b/drivers/gpu/drm/gud/gud_internal.h
@@ -84,6 +84,8 @@ static inline u8 gud_from_fourcc(u32 fourcc)
 		return GUD_PIXEL_FORMAT_R8;
 	case GUD_DRM_FORMAT_XRGB1111:
 		return GUD_PIXEL_FORMAT_XRGB1111;
+	case DRM_FORMAT_RGB332:
+		return GUD_PIXEL_FORMAT_RGB332;
 	case DRM_FORMAT_RGB565:
 		return GUD_PIXEL_FORMAT_RGB565;
 	case DRM_FORMAT_XRGB8888:
@@ -104,6 +106,8 @@ static inline u32 gud_to_fourcc(u8 format)
 		return DRM_FORMAT_R8;
 	case GUD_PIXEL_FORMAT_XRGB1111:
 		return GUD_DRM_FORMAT_XRGB1111;
+	case GUD_PIXEL_FORMAT_RGB332:
+		return DRM_FORMAT_RGB332;
 	case GUD_PIXEL_FORMAT_RGB565:
 		return DRM_FORMAT_RGB565;
 	case GUD_PIXEL_FORMAT_XRGB8888:
diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c
index be4f95b2d59c..868a0b8a1f3e 100644
--- a/drivers/gpu/drm/gud/gud_pipe.c
+++ b/drivers/gpu/drm/gud/gud_pipe.c
@@ -191,6 +191,8 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
 			}
 		} else if (format->format == DRM_FORMAT_R8) {
 			drm_fb_xrgb8888_to_gray8(buf, vaddr, fb, rect);
+		} else if (format->format == DRM_FORMAT_RGB332) {
+			drm_fb_xrgb8888_to_rgb332(buf, vaddr, fb, rect);
 		} else if (format->format == DRM_FORMAT_RGB565) {
 			drm_fb_xrgb8888_to_rgb565(buf, vaddr, fb, rect, gud_is_big_endian());
 		} else {
diff --git a/include/drm/gud.h b/include/drm/gud.h
index 1dc781009e62..4118dce2fcec 100644
--- a/include/drm/gud.h
+++ b/include/drm/gud.h
@@ -249,6 +249,7 @@ struct gud_state_req {
   #define GUD_PIXEL_FORMAT_R1			0x01 /* 1-bit monochrome */
   #define GUD_PIXEL_FORMAT_R8			0x08 /* 8-bit greyscale */
   #define GUD_PIXEL_FORMAT_XRGB1111		0x20
+  #define GUD_PIXEL_FORMAT_RGB332		0x30
   #define GUD_PIXEL_FORMAT_RGB565		0x40
   #define GUD_PIXEL_FORMAT_XRGB8888		0x80
   #define GUD_PIXEL_FORMAT_ARGB8888		0x81
-- 
2.32.0