[PATCH v4 5/6] drm/vkms: add rotate-270 property

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Currently, vkms supports the rotate-90, rotate-180, reflect-x and
reflect-y properties.  Therefore, improve the vkms IGT test coverage by
adding the rotate-270 property to vkms. The rotation was implement by
software: rotate the way the blending occurs by making the source x axis
be the destination y axis and the source y axis be the destination x
axis and reverse-read the axis.

Now, vkms supports all possible rotation values.

Tested with igt@kms_rotation_crc@primary-rotation-270,
and igt@kms_rotation_crc@sprite-rotation-270.

Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
---
 drivers/gpu/drm/vkms/vkms_composer.c | 5 ++++-
 drivers/gpu/drm/vkms/vkms_formats.c  | 6 ++++--
 drivers/gpu/drm/vkms/vkms_plane.c    | 7 ++-----
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
index 491850ffeac9..906d3df40cdb 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -4,6 +4,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_blend.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_vblank.h>
@@ -61,6 +62,8 @@ static int get_y_pos(struct vkms_frame_info *frame_info, int y)
 	switch (frame_info->rotation & DRM_MODE_ROTATE_MASK) {
 	case DRM_MODE_ROTATE_90:
 		return frame_info->rotated.x2 - y - 1;
+	case DRM_MODE_ROTATE_270:
+		return y + frame_info->rotated.x1;
 	default:
 		return y;
 	}
@@ -68,7 +71,7 @@ static int get_y_pos(struct vkms_frame_info *frame_info, int y)
 
 static bool check_limit(struct vkms_frame_info *frame_info, int pos)
 {
-	if (frame_info->rotation & DRM_MODE_ROTATE_90) {
+	if (drm_rotation_90_or_270(frame_info->rotation)) {
 		if (pos >= 0 && pos < drm_rect_width(&frame_info->rotated))
 			return true;
 	} else {
diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
index f56f359e0d2d..ebacb8efa055 100644
--- a/drivers/gpu/drm/vkms/vkms_formats.c
+++ b/drivers/gpu/drm/vkms/vkms_formats.c
@@ -2,6 +2,8 @@
 
 #include <linux/kernel.h>
 #include <linux/minmax.h>
+
+#include <drm/drm_blend.h>
 #include <drm/drm_rect.h>
 #include <drm/drm_fixed.h>
 
@@ -44,7 +46,7 @@ static void *get_packed_src_addr(const struct vkms_frame_info *frame_info, int y
 
 static int get_x_position(const struct vkms_frame_info *frame_info, int limit, int x)
 {
-	if (frame_info->rotation & DRM_MODE_REFLECT_X)
+	if (frame_info->rotation & (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_270))
 		return limit - x - 1;
 	return x;
 }
@@ -119,7 +121,7 @@ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state
 	for (size_t x = 0; x < limit; x++, src_pixels += frame_info->cpp) {
 		int x_pos = get_x_position(frame_info, limit, x);
 
-		if (frame_info->rotation & DRM_MODE_ROTATE_90)
+		if (drm_rotation_90_or_270(frame_info->rotation))
 			src_pixels = get_packed_src_addr(frame_info, x + frame_info->rotated.y1)
 				+ frame_info->cpp * y;
 
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 9e451ce97099..66263081639d 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -124,6 +124,7 @@ static void vkms_plane_atomic_update(struct drm_plane *plane,
 	drm_framebuffer_get(frame_info->fb);
 	frame_info->rotation = drm_rotation_simplify(new_state->rotation, DRM_MODE_ROTATE_0 |
 						     DRM_MODE_ROTATE_90 |
+						     DRM_MODE_ROTATE_270 |
 						     DRM_MODE_REFLECT_X |
 						     DRM_MODE_REFLECT_Y);
 
@@ -240,11 +241,7 @@ struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
 	drm_plane_helper_add(&plane->base, funcs);
 
 	drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0,
-					   DRM_MODE_ROTATE_0 |
-					   DRM_MODE_ROTATE_90 |
-					   DRM_MODE_ROTATE_180 |
-					   DRM_MODE_REFLECT_X |
-					   DRM_MODE_REFLECT_Y);
+					   DRM_MODE_ROTATE_MASK | DRM_MODE_REFLECT_MASK);
 
 	return plane;
 }
-- 
2.39.2




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