[PATCH 12/12] drm/format-helper: Move destination-buffer handling into internal helper

[Thomas Zimmermann <tzimmermann@suse.de>]

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.

Signed-off-by: Thomas Zimmermann <tzimmermann@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))
+{
+	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);
+}
+
+
 /**
  * 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);
 }
 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);
 }
 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