[PATCHv4 13/36] drm/komeda: Provide and use komeda_fb_get_pixel_addr variant not requiring a fb

[Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>]

Add a variant of the function which doesn't need neither
struct drm_framebuffer nor container_of it. Maintain current interface
for existing users.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
---
 .../arm/display/komeda/komeda_framebuffer.c   | 68 +++++++++++++++----
 .../arm/display/komeda/komeda_framebuffer.h   |  7 ++
 2 files changed, 61 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
index 4fa01b2e3f1c..00860a66ebf1 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
@@ -124,7 +124,12 @@ komeda_fb_none_afbc_size_check(struct komeda_dev *mdev,
 			return -EINVAL;
 		}
 
-		min_size = komeda_fb_get_pixel_addr(kfb, 0, fb->height, i)
+		min_size = komeda_fb_get_pixel_addr_nofb(info,
+							 mode_cmd->modifier[0],
+							 mode_cmd->pitches,
+							 mode_cmd->offsets,
+							 obj,
+							 0, mode_cmd->height, i)
 			 - to_drm_gem_cma_obj(obj)->paddr;
 		if (obj->size < min_size) {
 			DRM_DEBUG_KMS("The fb->obj[%d] size: 0x%zx lower than the minimum requirement: 0x%llx.\n",
@@ -238,12 +243,56 @@ int komeda_fb_check_src_coords(const struct komeda_fb *kfb,
 	return 0;
 }
 
+dma_addr_t
+komeda_fb_get_pixel_addr_impl(const struct drm_format_info *format,
+			      u64 modifier,
+			      const unsigned int *pitches,
+			      const unsigned int *offsets,
+			      const struct drm_gem_cma_object *obj,
+			      int x, int y, int plane)
+{
+	u32 offset, plane_x, plane_y, block_w, block_sz;
+
+	offset = offsets[plane];
+	if (modifier) {
+		block_w = drm_format_info_block_width(format, plane);
+		block_sz = format->char_per_block[plane];
+		plane_x = x / (plane ? format->hsub : 1);
+		plane_y = y / (plane ? format->vsub : 1);
+
+		offset += (plane_x / block_w) * block_sz
+			+ plane_y * pitches[plane];
+	}
+
+	return obj->paddr + offset;
+}
+
+dma_addr_t
+komeda_fb_get_pixel_addr_nofb(const struct drm_format_info *format,
+			      u64 modifier,
+			      const unsigned int *pitches,
+			      const unsigned int *offsets,
+			      struct drm_gem_object *obj,
+			      int x, int y, int plane)
+{
+	const struct drm_gem_cma_object *cma_obj;
+
+	if (plane >= format->num_planes) {
+		DRM_DEBUG_KMS("Out of max plane num.\n");
+		return -EINVAL;
+	}
+
+	cma_obj = to_drm_gem_cma_obj(obj);
+
+	return komeda_fb_get_pixel_addr_impl(format, modifier, pitches, offsets,
+					     cma_obj, x, y, plane);
+}
+
 dma_addr_t
 komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane)
 {
 	struct drm_framebuffer *fb = &kfb->base;
 	const struct drm_gem_cma_object *obj;
-	u32 offset, plane_x, plane_y, block_w, block_sz;
 
 	if (plane >= fb->format->num_planes) {
 		DRM_DEBUG_KMS("Out of max plane num.\n");
@@ -252,18 +301,9 @@ komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane)
 
 	obj = drm_fb_cma_get_gem_obj(fb, plane);
 
-	offset = fb->offsets[plane];
-	if (!fb->modifier) {
-		block_w = drm_format_info_block_width(fb->format, plane);
-		block_sz = fb->format->char_per_block[plane];
-		plane_x = x / (plane ? fb->format->hsub : 1);
-		plane_y = y / (plane ? fb->format->vsub : 1);
-
-		offset += (plane_x / block_w) * block_sz
-			+ plane_y * fb->pitches[plane];
-	}
-
-	return obj->paddr + offset;
+	return komeda_fb_get_pixel_addr_impl(fb->format, fb->modifier,
+					     fb->pitches, fb->offsets,
+					     obj, x, y, plane);
 }
 
 /* if the fb can be supported by a specific layer */
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h
index c61ca98a3a63..2f1f421d3e7f 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.h
@@ -42,6 +42,13 @@ int komeda_fb_check_src_coords(const struct komeda_fb *kfb,
 			       u32 src_x, u32 src_y, u32 src_w, u32 src_h);
 dma_addr_t
 komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane);
+dma_addr_t
+komeda_fb_get_pixel_addr_nofb(const struct drm_format_info *format,
+			      u64 modifier,
+			      const unsigned int *pitches,
+			      const unsigned int *offsets,
+			      struct drm_gem_object *obj,
+			      int x, int y, int plane);
 bool komeda_fb_is_layer_supported(struct komeda_fb *kfb, u32 layer_type,
 		u32 rot);
 
-- 
2.17.1

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