drm/format-helper: Rework RGB565-to-XRGB8888 conversion

Update RGB565-to-XRGB8888 conversion to support struct iosys_map
and convert all users. Although these are single-plane color formats,
the new interface supports multi-plane formats for consistency with
drm_fb_blit().

v2:
	* add TODO on vaddr location (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220808125406.20752-9-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
index 3ee57dc8bcc58da41d51780f8433f7d515416f19..b390d529afeb99c5d3157c98ac0cb61d5d086aa3 100644 (file)
--- a/drivers/gpu/drm/drm_format_helper.c
+++ b/drivers/gpu/drm/drm_format_helper.c
@@ -478,12 +478,25 @@ static void drm_fb_rgb565_to_xrgb8888_line(void *dbuf, const void *sbuf, unsigne
        }
 }
 
-static void drm_fb_rgb565_to_xrgb8888_toio(void __iomem *dst, unsigned int dst_pitch,
-                                          const void *vaddr, const struct drm_framebuffer *fb,
-                                          const struct drm_rect *clip)
+static void drm_fb_rgb565_to_xrgb8888(struct iosys_map *dst, const unsigned int *dst_pitch,
+                                     const struct iosys_map *vmap,
+                                     const struct drm_framebuffer *fb,
+                                     const struct drm_rect *clip)
 {
-       drm_fb_xfrm_toio(dst, dst_pitch, 4, vaddr, fb, clip, false,
-                        drm_fb_rgb565_to_xrgb8888_line);
+       static const unsigned int default_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
+               0, 0, 0, 0
+       };
+
+       if (!dst_pitch)
+               dst_pitch = default_dst_pitch;
+
+       /* TODO: handle vmap in I/O memory here */
+       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);
 }
 
 static void drm_fb_rgb888_to_xrgb8888_line(void *dbuf, const void *sbuf, unsigned int pixels)
@@ -651,8 +664,7 @@ int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t d
                                                       vmap[0].vaddr, fb, clip);
                        return 0;
                } else if (fb_format == DRM_FORMAT_RGB565) {
-                       drm_fb_rgb565_to_xrgb8888_toio(dst[0].vaddr_iomem, dst_pitch[0],
-                                                      vmap[0].vaddr, fb, clip);
+                       drm_fb_rgb565_to_xrgb8888(dst, dst_pitch, vmap, fb, clip);
                        return 0;
                }
        } else if (dst_format == DRM_FORMAT_XRGB2101010) {