Convert drm_fb_swab() to use struct iosys_map() and convert users. The
new interface supports multi-plane color formats, but implementation
only supports a single plane for now.
v2:
* use drm_format_info_bpp() (Sam)
* update documentation (Sam)
* add TODO on vaddr location (Sam)
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/drm_format_helper.c | 53 +++++++++++++++++++++--------
drivers/gpu/drm/drm_mipi_dbi.c | 2 +-
drivers/gpu/drm/gud/gud_pipe.c | 2 +-
include/drm/drm_format_helper.h | 6 ++--
4 files changed, 44 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
index 7489c665a47c..b5ed058984ae 100644
--- a/drivers/gpu/drm/drm_format_helper.c
+++ b/drivers/gpu/drm/drm_format_helper.c
@@ -205,37 +205,62 @@ static void drm_fb_swab32_line(void *dbuf, const void *sbuf, unsigned int pixels
/**
* drm_fb_swab - Swap bytes into clip buffer
- * @dst: Destination buffer
- * @dst_pitch: Number of bytes between two consecutive scanlines within dst
- * @src: Source buffer
+ * @dst: Array of 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.
+ * @vmap: Array of source buffers
* @fb: DRM framebuffer
* @clip: Clip rectangle area to copy
* @cached: Source buffer is mapped cached (eg. not write-combined)
*
- * If @cached is false a temporary buffer is used to cache one pixel line at a
- * time to speed up slow uncached reads.
+ * This function copies parts of a framebuffer to display memory and swaps per-pixel
+ * bytes during the process. Destination and framebuffer formats must match. The
+ * parameters @dst, @dst_pitch and @vmap 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. If @cached is
+ * false a temporary buffer is used to cache one pixel line at a time to speed up
+ * slow uncached reads.
*
- * This function does not apply clipping on dst, i.e. the destination
- * is at the top-left corner.
+ * This function does not apply clipping on @dst (i.e. the destination is at the
+ * top-left corner).
*/
-void drm_fb_swab(void *dst, unsigned int dst_pitch, const void *src,
- const struct drm_framebuffer *fb, const struct drm_rect *clip,
- bool cached)
+void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
+ const struct iosys_map *vmap, const struct drm_framebuffer *fb,
+ const struct drm_rect *clip, bool cached)
{
- u8 cpp = fb->format->cpp[0];
+ static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
+ 0, 0, 0, 0
+ };
+ const struct drm_format_info *format = fb->format;
+ u8 cpp = DIV_ROUND_UP(drm_format_info_bpp(format, 0), 8);
+ void (*swab_line)(void *dbuf, const void *sbuf, unsigned int npixels);
switch (cpp) {
case 4:
- drm_fb_xfrm(dst, dst_pitch, cpp, src, fb, clip, cached, drm_fb_swab32_line);
+ swab_line = drm_fb_swab32_line;
break;
case 2:
- drm_fb_xfrm(dst, dst_pitch, cpp, src, fb, clip, cached, drm_fb_swab16_line);
+ swab_line = drm_fb_swab16_line;
break;
default:
drm_warn_once(fb->dev, "Format %p4cc has unsupported pixel size.\n",
- &fb->format->format);
+ &format->format);
+ swab_line = NULL;
break;
}
+ if (!swab_line)
+ return;
+
+ if (!dst_pitch)
+ dst_pitch = default_dst_pitch;
+
+ /* TODO: handle vmap in I/O memory here */
+ if (dst->is_iomem)
+ drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], cpp,
+ vmap[0].vaddr, fb, clip, cached, swab_line);
+ else
+ drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], cpp, vmap[0].vaddr, fb,
+ clip, cached, swab_line);
}
EXPORT_SYMBOL(drm_fb_swab);
diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
index 1ba506ca83e1..a44b7d6ae06c 100644
--- a/drivers/gpu/drm/drm_mipi_dbi.c
+++ b/drivers/gpu/drm/drm_mipi_dbi.c
@@ -221,7 +221,7 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
switch (fb->format->format) {
case DRM_FORMAT_RGB565:
if (swap)
- drm_fb_swab(dst, 0, src, fb, clip, !gem->import_attach);
+ drm_fb_swab(&dst_map, NULL, data, fb, clip, !gem->import_attach);
else
drm_fb_memcpy(&dst_map, NULL, data, fb, clip);
break;
diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c
index 449c95a4aee0..a15cda9ba058 100644
--- a/drivers/gpu/drm/gud/gud_pipe.c
+++ b/drivers/gpu/drm/gud/gud_pipe.c
@@ -205,7 +205,7 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
len = gud_xrgb8888_to_color(buf, format, vaddr, fb, rect);
}
} else if (gud_is_big_endian() && format->cpp[0] > 1) {
- drm_fb_swab(buf, 0, vaddr, fb, rect, !import_attach);
+ drm_fb_swab(&dst, NULL, map_data, fb, rect, !import_attach);
} else if (compression && !import_attach && pitch == fb->pitches[0]) {
/* can compress directly from the framebuffer */
buf = vaddr + rect->y1 * pitch;
diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
index 8af6a2717bc9..60944feaa936 100644
--- a/include/drm/drm_format_helper.h
+++ b/include/drm/drm_format_helper.h
@@ -17,9 +17,9 @@ unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info
void drm_fb_memcpy(struct iosys_map *dst, const unsigned int *dst_pitch,
const struct iosys_map *vmap, const struct drm_framebuffer *fb,
const struct drm_rect *clip);
-void drm_fb_swab(void *dst, unsigned int dst_pitch, const void *src,
- const struct drm_framebuffer *fb, const struct drm_rect *clip,
- bool cached);
+void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
+ const struct iosys_map *vmap, const struct drm_framebuffer *fb,
+ const struct drm_rect *clip, bool cached);
void drm_fb_xrgb8888_to_rgb332(void *dst, unsigned int dst_pitch, const void *vaddr,
const struct drm_framebuffer *fb, const struct drm_rect *clip);
void drm_fb_xrgb8888_to_rgb565(void *dst, unsigned int dst_pitch, const void *vaddr,
--
2.37.1
