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drm: vc4: Add support for H & V flips on each plane for FKMS

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They are near zero cost options for the HVS, therefore they
may as well be implemented, and it allows us to invert the
DSI display.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
This commit is contained in:
Dave Stevenson
2019-04-09 17:19:51 +01:00
committed by popcornmix
parent 6b7d881175
commit 35a689d0e0
1 changed files with 36 additions and 0 deletions
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36
drivers/gpu/drm/vc4/vc4_firmware_kms.c
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@@ -62,8 +62,21 @@ struct set_plane {
u8 padding;
u32 planes[4]; /* DMA address of each plane */
u32 transform;
};
/* Values for the transform field */
#define TRANSFORM_NO_ROTATE 0
#define TRANSFORM_ROTATE_180 BIT(1)
#define TRANSFORM_FLIP_HRIZ BIT(16)
#define TRANSFORM_FLIP_VERT BIT(17)
#define SUPPORTED_ROTATIONS (DRM_MODE_ROTATE_0 | \
DRM_MODE_ROTATE_180 | \
DRM_MODE_REFLECT_X | \
DRM_MODE_REFLECT_Y)
struct mailbox_set_plane {
struct rpi_firmware_property_tag_header tag;
struct set_plane plane;
@@ -275,6 +288,7 @@ static void vc4_plane_atomic_update(struct drm_plane *plane,
struct vc4_crtc *vc4_crtc = to_vc4_crtc(state->crtc);
int num_planes = fb->format->num_planes;
struct drm_display_mode *mode = &state->crtc->mode;
unsigned int rotation = SUPPORTED_ROTATIONS;
mb->plane.vc_image_type = vc_fmt->vc_image;
mb->plane.width = fb->width;
@@ -295,6 +309,24 @@ static void vc4_plane_atomic_update(struct drm_plane *plane,
mb->plane.is_vu = vc_fmt->is_vu;
mb->plane.planes[0] = bo->paddr + fb->offsets[0];
rotation = drm_rotation_simplify(state->rotation, rotation);
switch (rotation) {
default:
case DRM_MODE_ROTATE_0:
mb->plane.transform = TRANSFORM_NO_ROTATE;
break;
case DRM_MODE_ROTATE_180:
mb->plane.transform = TRANSFORM_ROTATE_180;
break;
case DRM_MODE_REFLECT_X:
mb->plane.transform = TRANSFORM_FLIP_HRIZ;
break;
case DRM_MODE_REFLECT_Y:
mb->plane.transform = TRANSFORM_FLIP_VERT;
break;
}
/* FIXME: If the dest rect goes off screen then clip the src rect so we
* don't have off-screen pixels.
*/
@@ -514,9 +546,13 @@ static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev,
formats, num_formats, modifiers,
type, NULL);
/* FIXME: Do we need to be checking return values from all these calls?
*/
drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
drm_plane_create_alpha_property(plane);
drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
SUPPORTED_ROTATIONS);
/*
* Default frame buffer setup is with FB on -127, and raspistill etc