From c9043706cb11b8005e145debe0a3211acd08e2c1 Mon Sep 17 00:00:00 2001 From: Kerem Karabay Date: Wed, 26 Feb 2025 16:03:47 +0000 Subject: [PATCH 2363/5403] drm/format-helper: Add conversion from XRGB8888 to BGR888 Add XRGB8888 emulation helper for devices that only support BGR888. Signed-off-by: Kerem Karabay Signed-off-by: Aditya Garg Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/9A67EA95-9BC7-4D56-8F87-05EAC1C166AD@live.com --- drivers/gpu/drm/drm_format_helper.c | 54 +++++++++++++++++++++++++++++ include/drm/drm_format_helper.h | 3 ++ 2 files changed, 57 insertions(+) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index ecb278b63e8c..01d3ab307ac3 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -702,6 +702,57 @@ void drm_fb_xrgb8888_to_rgb888(struct iosys_map *dst, const unsigned int *dst_pi } EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888); +static void drm_fb_xrgb8888_to_bgr888_line(void *dbuf, const void *sbuf, unsigned int pixels) +{ + u8 *dbuf8 = dbuf; + const __le32 *sbuf32 = sbuf; + unsigned int x; + u32 pix; + + for (x = 0; x < pixels; x++) { + pix = le32_to_cpu(sbuf32[x]); + /* write red-green-blue to output in little endianness */ + *dbuf8++ = (pix & 0x00ff0000) >> 16; + *dbuf8++ = (pix & 0x0000ff00) >> 8; + *dbuf8++ = (pix & 0x000000ff) >> 0; + } +} + +/** + * drm_fb_xrgb8888_to_bgr888 - Convert XRGB8888 to BGR888 clip buffer + * @dst: Array of BGR888 destination buffers + * @dst_pitch: Array of numbers of bytes between the start of two consecutive scanlines + * within @dst; can be NULL if scanlines are stored next to each other. + * @src: Array of XRGB8888 source buffers + * @fb: DRM framebuffer + * @clip: Clip rectangle area to copy + * @state: Transform and conversion state + * + * This function copies parts of a framebuffer to display memory and converts the + * color format during the process. Destination and framebuffer formats must match. The + * parameters @dst, @dst_pitch and @src refer to arrays. Each array must have at + * least as many entries as there are planes in @fb's format. Each entry stores the + * value for the format's respective color plane at the same index. + * + * This function does not apply clipping on @dst (i.e. the destination is at the + * top-left corner). + * + * Drivers can use this function for BGR888 devices that don't natively + * support XRGB8888. + */ +void drm_fb_xrgb8888_to_bgr888(struct iosys_map *dst, const unsigned int *dst_pitch, + const struct iosys_map *src, const struct drm_framebuffer *fb, + const struct drm_rect *clip, struct drm_format_conv_state *state) +{ + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = { + 3, + }; + + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false, state, + drm_fb_xrgb8888_to_bgr888_line); +} +EXPORT_SYMBOL(drm_fb_xrgb8888_to_bgr888); + static void drm_fb_xrgb8888_to_argb8888_line(void *dbuf, const void *sbuf, unsigned int pixels) { __le32 *dbuf32 = dbuf; @@ -1104,6 +1155,9 @@ int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t d } else if (dst_format == DRM_FORMAT_RGB888) { drm_fb_xrgb8888_to_rgb888(dst, dst_pitch, src, fb, clip, state); return 0; + } else if (dst_format == DRM_FORMAT_BGR888) { + drm_fb_xrgb8888_to_bgr888(dst, dst_pitch, src, fb, clip, state); + return 0; } else if (dst_format == DRM_FORMAT_ARGB8888) { drm_fb_xrgb8888_to_argb8888(dst, dst_pitch, src, fb, clip, state); return 0; diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index a1347e47e9d5..d8539174ca11 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -96,6 +96,9 @@ void drm_fb_xrgb8888_to_rgba5551(struct iosys_map *dst, const unsigned int *dst_ void drm_fb_xrgb8888_to_rgb888(struct iosys_map *dst, const unsigned int *dst_pitch, const struct iosys_map *src, const struct drm_framebuffer *fb, const struct drm_rect *clip, struct drm_format_conv_state *state); +void drm_fb_xrgb8888_to_bgr888(struct iosys_map *dst, const unsigned int *dst_pitch, + const struct iosys_map *src, const struct drm_framebuffer *fb, + const struct drm_rect *clip, struct drm_format_conv_state *state); void drm_fb_xrgb8888_to_argb8888(struct iosys_map *dst, const unsigned int *dst_pitch, const struct iosys_map *src, const struct drm_framebuffer *fb, const struct drm_rect *clip, struct drm_format_conv_state *state); -- 2.54.0