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drm/gud: Add GUD_PIXEL_FORMAT_R8

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Add support for 8-bit greyscale format.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210929191201.34456-5-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes 2021-09-29 21:11:59 +02:00
parent bcf80d6ef1
commit 4cabfedc09
4 changed files with 10 additions and 2 deletions
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2
drivers/gpu/drm/gud/gud_drv.c
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@ -523,6 +523,8 @@ static int gud_probe(struct usb_interface *intf, const struct usb_device_id *id)
switch (format) {
case GUD_DRM_FORMAT_R1:
fallthrough;
case DRM_FORMAT_R8:
fallthrough;
case GUD_DRM_FORMAT_XRGB1111:
if (!xrgb8888_emulation_format)
xrgb8888_emulation_format = info;

4
drivers/gpu/drm/gud/gud_internal.h
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@ -80,6 +80,8 @@ static inline u8 gud_from_fourcc(u32 fourcc)
switch (fourcc) {
case GUD_DRM_FORMAT_R1:
return GUD_PIXEL_FORMAT_R1;
case DRM_FORMAT_R8:
return GUD_PIXEL_FORMAT_R8;
case GUD_DRM_FORMAT_XRGB1111:
return GUD_PIXEL_FORMAT_XRGB1111;
case DRM_FORMAT_RGB565:
@ -98,6 +100,8 @@ static inline u32 gud_to_fourcc(u8 format)
switch (format) {
case GUD_PIXEL_FORMAT_R1:
return GUD_DRM_FORMAT_R1;
case GUD_PIXEL_FORMAT_R8:
return DRM_FORMAT_R8;
case GUD_PIXEL_FORMAT_XRGB1111:
return GUD_DRM_FORMAT_XRGB1111;
case GUD_PIXEL_FORMAT_RGB565:

2
drivers/gpu/drm/gud/gud_pipe.c
View File

@ -189,6 +189,8 @@ retry:
ret = -ENOMEM;
goto end_cpu_access;
}
} else if (format->format == DRM_FORMAT_R8) {
drm_fb_xrgb8888_to_gray8(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 {

4
include/drm/gud.h
View File

@ -246,8 +246,8 @@ struct gud_state_req {
/* Get supported pixel formats as a byte array of GUD_PIXEL_FORMAT_* */
#define GUD_REQ_GET_FORMATS 0x40
#define GUD_FORMATS_MAX_NUM 32
/* R1 is a 1-bit monochrome transfer format presented to userspace as XRGB8888 */
#define GUD_PIXEL_FORMAT_R1 0x01
#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_RGB565 0x40
#define GUD_PIXEL_FORMAT_XRGB8888 0x80