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| author | Maíra Canal <mcanal@igalia.com> | 2023-05-09 01:00:29 +0300 |
|---|---|---|
| committer | Maíra Canal <mairacanal@riseup.net> | 2023-06-20 02:40:09 +0300 |
| commit | d755cd3cffe52a4b64c926f4e680d2e2a6edcd94 (patch) | |
| tree | cf604248fb7eab470185f6d6390edf78c2bb5f8d /drivers/gpu/drm | |
| parent | 042aeecc02c83500ad5a4de1e40d2efdfed49a07 (diff) | |
| download | linux-d755cd3cffe52a4b64c926f4e680d2e2a6edcd94.tar.xz | |
drm/vkms: Add kernel-doc to the function vkms_compose_row()
The function vkms_compose_row() was introduced in the code without any
documentation. In order to make the function more clear, add a
kernel-doc to it.
Suggested-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230508220030.434118-1-mcanal@igalia.com
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/vkms/vkms_formats.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c index 5945da0beba6..542100041049 100644 --- a/drivers/gpu/drm/vkms/vkms_formats.c +++ b/drivers/gpu/drm/vkms/vkms_formats.c @@ -111,6 +111,19 @@ static void RGB565_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel) out_pixel->b = drm_fixp2int_round(drm_fixp_mul(fp_b, fp_rb_ratio)); } +/** + * vkms_compose_row - compose a single row of a plane + * @stage_buffer: output line with the composed pixels + * @plane: state of the plane that is being composed + * @y: y coordinate of the row + * + * This function composes a single row of a plane. It gets the source pixels + * through the y coordinate (see get_packed_src_addr()) and goes linearly + * through the source pixel, reading the pixels and converting it to + * ARGB16161616 (see the pixel_read() callback). For rotate-90 and rotate-270, + * the source pixels are not traversed linearly. The source pixels are queried + * on each iteration in order to traverse the pixels vertically. + */ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y) { struct pixel_argb_u16 *out_pixels = stage_buffer->pixels; |