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drm/format-helper: Provide drm_fb_blit()

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Provide drm_fb_blit() that works with struct iosys_map. Update all
users of drm_fb_blit_toio(), which required a destination buffer in
I/O memory.

This patch only updates the function's interface. The implementation
still relies on the destination buffer to be located in  I/O memory.
See the follow-up patches for implementational changes. The new
function's interface works with multi-plane color formats, but again
implementation only supports a single plane for now.

v2:
	* rebase onto refactored simpledrm
	* use IOSYS_MAP_INIT_VADDR() (Sam)
	* update the commit message on the use of I/O memory (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220808125406.20752-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-08-08 14:53:54 +02:00
parent 116d902fa9
commit 71bf55872c
3 changed files with 36 additions and 23 deletions
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44
drivers/gpu/drm/drm_format_helper.c
View File

@ -8,9 +8,10 @@
* (at your option) any later version.
*/
#include <linux/io.h>
#include <linux/iosys-map.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <drm/drm_device.h>
#include <drm/drm_format_helper.h>
@ -545,9 +546,10 @@ void drm_fb_xrgb8888_to_gray8(void *dst, unsigned int dst_pitch, const void *vad
EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray8);
/**
* drm_fb_blit_toio - Copy parts of a framebuffer to display memory
* @dst: The display memory to copy to
* @dst_pitch: Number of bytes between two consecutive scanlines within dst
* drm_fb_blit - Copy parts of a framebuffer to display memory
* @dst: Array of display-memory addresses to copy to
* @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.
* @dst_format: FOURCC code of the display's color format
* @vmap: The framebuffer memory to copy from
* @fb: The framebuffer to copy from
@ -555,16 +557,22 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray8);
*
* This function copies parts of a framebuffer to display memory. If the
* formats of the display and the framebuffer mismatch, the blit function
* will attempt to convert between them.
* will attempt to convert between them during the process. The parameters @dst,
* @dst_pitch and @vmap refer to arrays. Each array must have at least as many
* entries as there are planes in @dst_format'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).
*
* Returns:
* 0 on success, or
* -EINVAL if the color-format conversion failed, or
* a negative error code otherwise.
*/
int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_format,
const void *vmap, const struct drm_framebuffer *fb,
const struct drm_rect *clip)
int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t dst_format,
const struct iosys_map *vmap, const struct drm_framebuffer *fb,
const struct drm_rect *clip)
{
uint32_t fb_format = fb->format->format;
@ -579,30 +587,35 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for
dst_format = DRM_FORMAT_XRGB2101010;
if (dst_format == fb_format) {
drm_fb_memcpy_toio(dst, dst_pitch, vmap, fb, clip);
drm_fb_memcpy_toio(dst[0].vaddr_iomem, dst_pitch[0], vmap[0].vaddr, fb, clip);
return 0;
} else if (dst_format == DRM_FORMAT_RGB565) {
if (fb_format == DRM_FORMAT_XRGB8888) {
drm_fb_xrgb8888_to_rgb565_toio(dst, dst_pitch, vmap, fb, clip, false);
drm_fb_xrgb8888_to_rgb565_toio(dst[0].vaddr_iomem, dst_pitch[0],
vmap[0].vaddr, fb, clip, false);
return 0;
}
} else if (dst_format == DRM_FORMAT_RGB888) {
if (fb_format == DRM_FORMAT_XRGB8888) {
drm_fb_xrgb8888_to_rgb888_toio(dst, dst_pitch, vmap, fb, clip);
drm_fb_xrgb8888_to_rgb888_toio(dst[0].vaddr_iomem, dst_pitch[0],
vmap[0].vaddr, fb, clip);
return 0;
}
} else if (dst_format == DRM_FORMAT_XRGB8888) {
if (fb_format == DRM_FORMAT_RGB888) {
drm_fb_rgb888_to_xrgb8888_toio(dst, dst_pitch, vmap, fb, clip);
drm_fb_rgb888_to_xrgb8888_toio(dst[0].vaddr_iomem, dst_pitch[0],
vmap[0].vaddr, fb, clip);
return 0;
} else if (fb_format == DRM_FORMAT_RGB565) {
drm_fb_rgb565_to_xrgb8888_toio(dst, dst_pitch, vmap, fb, clip);
drm_fb_rgb565_to_xrgb8888_toio(dst[0].vaddr_iomem, dst_pitch[0],
vmap[0].vaddr, fb, clip);
return 0;
}
} else if (dst_format == DRM_FORMAT_XRGB2101010) {
if (fb_format == DRM_FORMAT_XRGB8888) {
drm_fb_xrgb8888_to_xrgb2101010_toio(dst, dst_pitch, vmap, fb, clip);
drm_fb_xrgb8888_to_xrgb2101010_toio(dst[0].vaddr_iomem, dst_pitch[0],
vmap[0].vaddr, fb, clip);
return 0;
}
}
@ -612,8 +625,7 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for
return -EINVAL;
}
EXPORT_SYMBOL(drm_fb_blit_toio);
EXPORT_SYMBOL(drm_fb_blit);
static void drm_fb_gray8_to_mono_line(void *dbuf, const void *sbuf, unsigned int pixels)
{

8
drivers/gpu/drm/tiny/simpledrm.c
View File

@ -508,11 +508,10 @@ static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane
struct drm_plane_state *plane_state = plane->state;
struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(old_state, plane);
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
void *vmap = shadow_plane_state->data[0].vaddr; /* TODO: Use mapping abstraction */
struct drm_framebuffer *fb = plane_state->fb;
struct drm_device *dev = plane->dev;
struct simpledrm_device *sdev = simpledrm_device_of_dev(dev);
void __iomem *dst = sdev->screen_base;
struct iosys_map dst = IOSYS_MAP_INIT_VADDR(sdev->screen_base);
struct drm_rect src_clip, dst_clip;
int idx;
@ -529,8 +528,9 @@ static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane
if (!drm_dev_enter(dev, &idx))
return;
dst += drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip);
drm_fb_blit_toio(dst, sdev->pitch, sdev->format->format, vmap, fb, &src_clip);
iosys_map_incr(&dst, drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip));
drm_fb_blit(&dst, &sdev->pitch, sdev->format->format, shadow_plane_state->data, fb,
&src_clip);
drm_dev_exit(idx);
}

7
include/drm/drm_format_helper.h
View File

@ -6,6 +6,7 @@
#ifndef __LINUX_DRM_FORMAT_HELPER_H
#define __LINUX_DRM_FORMAT_HELPER_H
struct iosys_map;
struct drm_format_info;
struct drm_framebuffer;
struct drm_rect;
@ -39,9 +40,9 @@ void drm_fb_xrgb8888_to_xrgb2101010_toio(void __iomem *dst, unsigned int dst_pit
void drm_fb_xrgb8888_to_gray8(void *dst, unsigned int dst_pitch, const void *vaddr,
const struct drm_framebuffer *fb, const struct drm_rect *clip);
int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_format,
const void *vmap, const struct drm_framebuffer *fb,
const struct drm_rect *rect);
int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t dst_format,
const struct iosys_map *vmap, const struct drm_framebuffer *fb,
const struct drm_rect *rect);
void drm_fb_xrgb8888_to_mono(void *dst, unsigned int dst_pitch, const void *src,
const struct drm_framebuffer *fb, const struct drm_rect *clip);