Hi Thomas,
On Wed, Jul 27, 2022 at 01:33:12PM +0200, Thomas Zimmermann wrote:
> The format-convertion helpers handle several cases for different
> values of destination buffer and pitch. Move that code into the
> internal helper drm_fb_xfrm() and avoid quite a bit of duplucation.
This is very nice patch that should come before all the conversion
patches - but then you have had to come up with another name.
So I think this is fine.
A few comments below, mostly in the same area as the comments from José.
Sam
>
> Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
> ---
> drivers/gpu/drm/drm_format_helper.c | 169 +++++++++++-----------------
> 1 file changed, 64 insertions(+), 105 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_format_helper.c
> b/drivers/gpu/drm/drm_format_helper.c
> index d296d181659d..35aebdb90165 100644
> --- a/drivers/gpu/drm/drm_format_helper.c
> +++ b/drivers/gpu/drm/drm_format_helper.c
> @@ -41,11 +41,11 @@ unsigned int drm_fb_clip_offset(unsigned int pitch, const
> struct drm_format_info
> }
> EXPORT_SYMBOL(drm_fb_clip_offset);
>
> -/* TODO: Make this functon work with multi-plane formats. */
> -static int drm_fb_xfrm(void *dst, unsigned long dst_pitch, unsigned long
> dst_pixsize,
> - const void *vaddr, const struct drm_framebuffer *fb,
> - const struct drm_rect *clip, bool vaddr_cached_hint,
> - void (*xfrm_line)(void *dbuf, const void *sbuf, unsigned
> int npixels))
> +/* TODO: Make this function work with multi-plane formats. */
> +static int __drm_fb_xfrm(void *dst, unsigned long dst_pitch, unsigned long
> dst_pixsize,
> + const void *vaddr, const struct drm_framebuffer *fb,
> + const struct drm_rect *clip, bool vaddr_cached_hint,
> + void (*xfrm_line)(void *dbuf, const void *sbuf,
> unsigned int npixels))
> {
> unsigned long linepixels = drm_rect_width(clip);
> unsigned long lines = drm_rect_height(clip);
> @@ -84,11 +84,11 @@ static int drm_fb_xfrm(void *dst, unsigned long
> dst_pitch, unsigned long dst_pix
> return 0;
> }
>
> -/* TODO: Make this functon work with multi-plane formats. */
> -static int drm_fb_xfrm_toio(void __iomem *dst, unsigned long dst_pitch,
> unsigned long dst_pixsize,
> - const void *vaddr, const struct drm_framebuffer *fb,
> - const struct drm_rect *clip, bool vaddr_cached_hint,
> - void (*xfrm_line)(void *dbuf, const void *sbuf,
> unsigned int npixels))
> +/* TODO: Make this function work with multi-plane formats. */
> +static int __drm_fb_xfrm_toio(void __iomem *dst, unsigned long dst_pitch,
> unsigned long dst_pixsize,
> + const void *vaddr, const struct drm_framebuffer
> *fb,
> + const struct drm_rect *clip, bool
> vaddr_cached_hint,
> + void (*xfrm_line)(void *dbuf, const void *sbuf,
> unsigned int npixels))
> {
> unsigned long linepixels = drm_rect_width(clip);
> unsigned long lines = drm_rect_height(clip);
> @@ -129,6 +129,29 @@ static int drm_fb_xfrm_toio(void __iomem *dst, unsigned
> long dst_pitch, unsigned
> return 0;
> }
>
> +/* TODO: Make this function work with multi-plane formats. */
> +static int drm_fb_xfrm(struct iosys_map *dst,
> + const unsigned int *dst_pitch, const u8 *dst_pixsize,
> + const struct iosys_map *vmap, const struct
> drm_framebuffer *fb,
> + const struct drm_rect *clip, bool vaddr_cached_hint,
> + void (*xfrm_line)(void *dbuf, const void *sbuf, unsigned
> int npixels))
> +{
Just to repeat myself a little, this assumes src (vmap) is always system
memory (not io).
> + static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> + 0, 0, 0, 0
> + };
> +
> + if (!dst_pitch)
> + dst_pitch = default_dst_pitch;
> +
> + if (dst[0].is_iomem)
> + return __drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0],
> dst_pixsize[0],
> + vmap[0].vaddr, fb, clip, false,
> xfrm_line);
> + else
> + return __drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], dst_pixsize[0],
> + vmap[0].vaddr, fb, clip, false, xfrm_line);
It looks like vaddr_cached_hint is always false, so can we remove it?
> +}
> +
> +
> /**
> * drm_fb_memcpy - Copy clip buffer
> * @dst: Array of destination buffers
> @@ -213,14 +236,10 @@ 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)
> {
> - 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 = format->cpp[0];
> void (*swab_line)(void *dbuf, const void *sbuf, unsigned int npixels);
>
> - switch (cpp) {
> + switch (format->cpp[0]) {
> case 4:
> swab_line = drm_fb_swab32_line;
> break;
> @@ -230,21 +249,10 @@ void drm_fb_swab(struct iosys_map *dst, const unsigned
> int *dst_pitch,
> default:
> drm_warn_once(fb->dev, "Format %p4cc has unsupported pixel
> size.\n",
> &format->format);
> - swab_line = NULL;
> - break;
> - }
> - if (!swab_line)
> return;
> + }
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - 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);
> + drm_fb_xfrm(dst, dst_pitch, format->cpp, vmap, fb, clip, cached,
> swab_line);
In this case we pass fb->format-cpp as dst_pitch - so we could retreive
is via the fb pointer.
> }
> EXPORT_SYMBOL(drm_fb_swab);
>
> @@ -277,19 +285,12 @@ void drm_fb_xrgb8888_to_rgb332(struct iosys_map *dst,
> const unsigned int *dst_pi
> const struct iosys_map *vmap, const struct
> drm_framebuffer *fb,
> const struct drm_rect *clip)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 1,
> };
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 1,
> vmap[0].vaddr, fb, clip,
> - false, drm_fb_xrgb8888_to_rgb332_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 1, vmap[0].vaddr, fb,
> clip,
> - false, drm_fb_xrgb8888_to_rgb332_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> + drm_fb_xrgb8888_to_rgb332_line);
Here we construct the dst_pixsize.
What is needed to make us trust fb->format->cpp so we can just fetch the
info from format_info and drop dst_pixsize?
I do not see any lookup being necessary here or in the functions below.
If we use cpp (or even better using a helper function that avoid the
deprecated cpp), then adding support for planes is simpler. For now
dst_pixsize only pass the size for the first plane and there are a lot
of updates required to support additional planes.
Maybe I miss something obvious?!?
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb332);
>
> @@ -344,9 +345,10 @@ void drm_fb_xrgb8888_to_rgb565(struct iosys_map *dst,
> const unsigned int *dst_pi
> const struct iosys_map *vmap, const struct
> drm_framebuffer *fb,
> const struct drm_rect *clip, bool swab)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 2,
> };
> +
> void (*xfrm_line)(void *dbuf, const void *sbuf, unsigned int npixels);
>
> if (swab)
> @@ -354,15 +356,7 @@ void drm_fb_xrgb8888_to_rgb565(struct iosys_map *dst,
> const unsigned int *dst_pi
> else
> xfrm_line = drm_fb_xrgb8888_to_rgb565_line;
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 2,
> vmap[0].vaddr, fb, clip,
> - false, xfrm_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 2, vmap[0].vaddr, fb,
> clip,
> - false, xfrm_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> xfrm_line);
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565);
>
> @@ -396,19 +390,12 @@ void drm_fb_xrgb8888_to_rgb888(struct iosys_map *dst,
> const unsigned int *dst_pi
> const struct iosys_map *vmap, const struct
> drm_framebuffer *fb,
> const struct drm_rect *clip)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 3,
> };
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 3,
> vmap[0].vaddr, fb,
> - clip, false, drm_fb_xrgb8888_to_rgb888_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 3, vmap[0].vaddr, fb,
> - clip, false, drm_fb_xrgb8888_to_rgb888_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> + drm_fb_xrgb8888_to_rgb888_line);
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888);
>
> @@ -435,19 +422,12 @@ static void drm_fb_rgb565_to_xrgb8888(struct iosys_map
> *dst, const unsigned int
> const struct drm_framebuffer *fb,
> const struct drm_rect *clip)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 4,
> };
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 4,
> vmap[0].vaddr, fb,
> - clip, false, drm_fb_rgb565_to_xrgb8888_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 4, vmap[0].vaddr, fb,
> - clip, false, drm_fb_rgb565_to_xrgb8888_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> + drm_fb_rgb565_to_xrgb8888_line);
> }
>
> static void drm_fb_rgb888_to_xrgb8888_line(void *dbuf, const void *sbuf,
> unsigned int pixels)
> @@ -470,19 +450,12 @@ static void drm_fb_rgb888_to_xrgb8888(struct iosys_map
> *dst, const unsigned int
> const struct drm_framebuffer *fb,
> const struct drm_rect *clip)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 4,
> };
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 4,
> vmap[0].vaddr, fb,
> - clip, false, drm_fb_rgb888_to_xrgb8888_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 4, vmap[0].vaddr, fb,
> - clip, false, drm_fb_rgb888_to_xrgb8888_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> + drm_fb_rgb888_to_xrgb8888_line);
> }
>
> static void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void
> *sbuf, unsigned int pixels)
> @@ -518,19 +491,12 @@ void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map
> *dst, const unsigned int *d
> const struct iosys_map *vmap, const struct
> drm_framebuffer *fb,
> const struct drm_rect *clip)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 4,
> };
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 4,
> vmap[0].vaddr, fb,
> - clip, false,
> drm_fb_xrgb8888_to_xrgb2101010_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 4, vmap[0].vaddr, fb,
> - clip, false, drm_fb_xrgb8888_to_xrgb2101010_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> + drm_fb_xrgb8888_to_xrgb2101010_line);
> }
>
> static void drm_fb_xrgb8888_to_gray8_line(void *dbuf, const void *sbuf,
> unsigned int pixels)
> @@ -571,19 +537,12 @@ void drm_fb_xrgb8888_to_gray8(struct iosys_map *dst,
> const unsigned int *dst_pit
> const struct iosys_map *vmap, const struct
> drm_framebuffer *fb,
> const struct drm_rect *clip)
> {
> - static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
> - 0, 0, 0, 0
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 1,
> };
>
> - if (!dst_pitch)
> - dst_pitch = default_dst_pitch;
> -
> - if (dst[0].is_iomem)
> - drm_fb_xfrm_toio(dst[0].vaddr_iomem, dst_pitch[0], 1,
> vmap[0].vaddr, fb,
> - clip, false, drm_fb_xrgb8888_to_gray8_line);
> - else
> - drm_fb_xfrm(dst[0].vaddr, dst_pitch[0], 1, vmap[0].vaddr, fb,
> - clip, false, drm_fb_xrgb8888_to_gray8_line);
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, vmap, fb, clip, false,
> + drm_fb_xrgb8888_to_gray8_line);
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray8);
>
> --
> 2.37.1
