kernel/linux.git/drivers/gpu/drm/drm_format_helper.c, branch v6.6.150

drm/format-helper: Support the AB24/XB24 formats

2023-01-23T14:02:41+00:00

Add a conversion helper for the AB24 and XB24 formats to use in drm_fb_blit(). Reviewed-by: Thomas Zimmermann Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/20230120173103.4002342-7-thierry.reding@gmail.com

drm/format-helper: Remove unnecessary conversion helpers

2023-01-03T13:28:02+00:00

Drivers only emulate XRGB8888 framebuffers. Remove all conversion helpers that do not use XRGB8888 as their source format. Also remove some special cases for alpha formats in the blit helper. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-14-tzimmermann@suse.de

drm/format-helper: Simplify drm_fb_build_fourcc_list()

2023-01-03T13:27:39+00:00

The DRM helper drm_fb_build_fourcc_list() creates a list of color formats for primary planes of the generic drivers. Simplify the helper: - It used to mix and filter native and emulated formats as provided by the driver. Now the only emulated format is XRGB8888, which is required as fallback by legacy software. Drop support for emulating any other formats. - Also convert alpha formats to their non-alpha counterparts. Generic drivers don't support primary planes with alpha formats and some DTs incorrectly advertise alpha channels for non-alpha hardware. So only export non-alpha formats for primary planes. With the simplified helper, scrap format lists of the affected generic drivers. All they need is the firmware buffer's native format, from which the helper creates the list of color formats. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-13-tzimmermann@suse.de

drm/format-helper: Add conversion from XRGB8888 to 15-bit RGB555 formats

2023-01-03T13:26:05+00:00

Add conversion from XRGB8888 to XRGB1555, ARGB1555 and RGBA5551, which are the formats currently supported by the simplefb infrastructure. The new helpers allow the output of XRGB8888 framebuffers to firmware scanout buffers in one of the 15-bit formats. v3: * use __le* for destination buffers (Jose, kernel test robot) v2: * test 15-bit results with local endianness (Jose) Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Reviewed-by: José Expósito Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-10-tzimmermann@suse.de

drm/format-helper: Add conversion from XRGB8888 to ARGB2101010

2023-01-03T13:25:41+00:00

Add dedicated helper to convert from XRGB8888 to ARGB2101010. Sets all alpha bits to make pixels fully opaque. v2: * set correct format in struct drm_framebuffer (Javier) * use cpubuf_to_le32() * type fixes Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Reviewed-by: José Expósito Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-9-tzimmermann@suse.de

drm/format-helper: Add conversion from XRGB8888 to ARGB8888

2023-01-03T13:25:17+00:00

Add dedicated helper to convert from XRGB8888 to ARGB8888. Sets all alpha bits to make pixels fully opaque. v3: * use __le32 for destination buffer (Jose, kernel test robot) v2: * use cpubuf_to_le32() * type fixes Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Reviewed-by: José Expósito Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-8-tzimmermann@suse.de

drm/format-helper: Flip src/dst-format branches in blit helper

2023-01-03T13:24:52+00:00

Upcoming changes to the format conversion will mostly blit from XRGB8888 to some other format. So put the source format in blit's outer branches to make the code more readable. For cases where a format only changes its endianness, such as XRGB565, introduce dedicated branches that handle this for all formats. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-7-tzimmermann@suse.de

drm/format-helper: Store RGB565 in little-endian order

2023-01-03T13:24:08+00:00

Fix to-RGB565 conversion helpers to store the result in little- endian byte order. Update test cases as well. Signed-off-by: Thomas Zimmermann Reviewed-by: Maíra Canal Reviewed-by: José Expósito Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-5-tzimmermann@suse.de

drm/format-helper: Comment on RGB888 byte order

2023-01-03T13:23:24+00:00

RGB888 is different than the other formats as most of its pixels are unaligned and therefore helper functions do not use endianness conversion helpers. Comment on this in the source code. Signed-off-by: Thomas Zimmermann Reviewed-by: Maíra Canal Reviewed-by: José Expósito Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-3-tzimmermann@suse.de

Backmerge tag 'v6.1-rc6' into drm-next

2022-11-24T01:05:43+00:00

Linux 6.1-rc6 This is needed for drm-misc-next and tegra. Signed-off-by: Dave Airlie