[PATCH 2/2] drm: rcar-du: Add support for colorkey alpha blending
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Thu May 4 12:44:10 UTC 2017
Hi Alexandru,
On Thursday 04 May 2017 13:53:33 agheorghe wrote:
> Add two new plane properties colorkey and colorkey_alpha for rcar gen3.
> * colorkey:
> - used for specifying the color on which the filtering is done.
> - bits 0 to 23 are interpreted as RGB888 format, in case we are
> dealing with an YCbCr format, only the Y componenet is
> compared and it is represented by the G bits from RGB888
> format.
> - bit 24 tells if it is enabled or not.
> * colorkey_alpha:
> - the alpha to be set for matching pixels, in case it is
> missing the pixels will be made transparent
Colour keying is a feature found in most display engines, and would thus
benefit from standardizing the properties. Instead of adding another colorkey
property specific to rcar-du, could you make a proposal to standardize it ?
> Signed-off-by: agheorghe <Alexandru_Gheorghe at mentor.com>
> ---
> drivers/gpu/drm/rcar-du/rcar_du_drv.h | 1 +
> drivers/gpu/drm/rcar-du/rcar_du_kms.c | 8 ++++++++
> drivers/gpu/drm/rcar-du/rcar_du_plane.c | 3 ---
> drivers/gpu/drm/rcar-du/rcar_du_plane.h | 6 ++++++
> drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 22 ++++++++++++++++++++++
> drivers/gpu/drm/rcar-du/rcar_du_vsp.h | 5 +++++
> 6 files changed, 42 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> b/drivers/gpu/drm/rcar-du/rcar_du_drv.h index 91e8fc5..1cb92e3 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -98,6 +98,7 @@ struct rcar_du_device {
> struct {
> struct drm_property *alpha;
> struct drm_property *colorkey;
> + struct drm_property *colorkey_alpha;
> } props;
>
> unsigned int dpad0_source;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> b/drivers/gpu/drm/rcar-du/rcar_du_kms.c index 1cc88ed..a733fa2 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -630,6 +630,14 @@ static int rcar_du_properties_init(struct
> rcar_du_device *rcdu) if (rcdu->props.colorkey == NULL)
> return -ENOMEM;
>
> + if (rcdu->info->gen == 3) {
> + rcdu->props.colorkey_alpha =
> + drm_property_create_range(rcdu->ddev, 0,
> + "colorkey_alpha", 0, 255);
> + if (!rcdu->props.colorkey_alpha)
> + return -ENOMEM;
> + }
> +
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
> b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index e408aa3..df689c4 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
> @@ -307,9 +307,6 @@ int rcar_du_atomic_check_planes(struct drm_device *dev,
> * Plane Setup
> */
>
> -#define RCAR_DU_COLORKEY_NONE (0 << 24)
> -#define RCAR_DU_COLORKEY_SOURCE (1 << 24)
> -#define RCAR_DU_COLORKEY_MASK (1 << 24)
>
> static void rcar_du_plane_write(struct rcar_du_group *rgrp,
> unsigned int index, u32 reg, u32 data)
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.h
> b/drivers/gpu/drm/rcar-du/rcar_du_plane.h index c1de338..9e7c3b6 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.h
> @@ -49,6 +49,12 @@ static inline struct rcar_du_plane *to_rcar_plane(struct
> drm_plane *plane) return container_of(plane, struct rcar_du_plane, plane);
> }
>
> +#define RCAR_DU_COLORKEY_NONE (0 << 24)
> +#define RCAR_DU_COLORKEY_MASK BIT(24)
> +#define RCAR_DU_COLORKEY_EN_MASK RCAR_DU_COLORKEY_MASK
> +#define RCAR_DU_COLORKEY_COLOR_MASK 0xFFFFFF
> +#define RCAR_DU_COLORKEY_ALPHA_MASK 0xFF
> +
> /**
> * struct rcar_du_plane_state - Driver-specific plane state
> * @state: base DRM plane state
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c index 4b460d4..b223be1 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> @@ -180,6 +180,11 @@ static void rcar_du_vsp_plane_setup(struct
> rcar_du_vsp_plane *plane) .pitch = fb->pitches[0],
> .alpha = state->alpha,
> .zpos = state->state.zpos,
> + .colorkey = state->colorkey & RCAR_DU_COLORKEY_COLOR_MASK,
> + .colorkey_en =
> + ((state->colorkey & RCAR_DU_COLORKEY_EN_MASK) != 0),
> + .colorkey_alpha =
> + (state->colorkey_alpha & RCAR_DU_COLORKEY_ALPHA_MASK),
> };
> unsigned int i;
>
> @@ -379,6 +384,8 @@ static void rcar_du_vsp_plane_reset(struct drm_plane
> *plane) return;
>
> state->alpha = 255;
> + state->colorkey = RCAR_DU_COLORKEY_NONE;
> + state->colorkey_alpha = 0;
> state->state.zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
>
> plane->state = &state->state;
> @@ -394,6 +401,10 @@ static int rcar_du_vsp_plane_atomic_set_property(struct
> drm_plane *plane,
>
> if (property == rcdu->props.alpha)
> rstate->alpha = val;
> + else if (property == rcdu->props.colorkey)
> + rstate->colorkey = val;
> + else if (property == rcdu->props.colorkey_alpha)
> + rstate->colorkey_alpha = val;
> else
> return -EINVAL;
>
> @@ -410,6 +421,10 @@ static int rcar_du_vsp_plane_atomic_get_property(struct
> drm_plane *plane,
>
> if (property == rcdu->props.alpha)
> *val = rstate->alpha;
> + else if (property == rcdu->props.colorkey)
> + *val = rstate->colorkey;
> + else if (property == rcdu->props.colorkey_alpha)
> + *val = rstate->colorkey_alpha;
> else
> return -EINVAL;
>
> @@ -633,6 +648,13 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp)
>
> drm_object_attach_property(&plane->plane.base,
> rcdu->props.alpha, 255);
> + drm_object_attach_property(&plane->plane.base,
> + rcdu->props.colorkey,
> + RCAR_DU_COLORKEY_NONE);
> + if (rcdu->props.colorkey_alpha)
> + drm_object_attach_property(&plane->plane.base,
> + rcdu->props.colorkey_alpha,
> + 0);
> drm_plane_create_zpos_property(&plane->plane, 1, 1,
> vsp->num_planes - 1);
> }
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
> b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h index 3fd9cef..1543503 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
> @@ -47,6 +47,9 @@ static inline struct rcar_du_vsp_plane
> *to_rcar_vsp_plane(struct drm_plane *p) * @sg_tables: scatter-gather tables
> for the frame buffer memory
> * @alpha: value of the plane alpha property
> * @zpos: value of the plane zpos property
> + * @colorkey: value of the color for which to apply colorkey_alpha, bit 24
> + * tells if it is enabled or not
> + * @colorkey_alpha: alpha to be used for pixels with color equal to
> colorkey */
> struct rcar_du_vsp_plane_state {
> struct drm_plane_state state;
> @@ -56,6 +59,8 @@ struct rcar_du_vsp_plane_state {
>
> unsigned int alpha;
> unsigned int zpos;
> + u32 colorkey;
> + u32 colorkey_alpha;
> };
>
> static inline struct rcar_du_vsp_plane_state *
--
Regards,
Laurent Pinchart
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