On Wed, Sep 14, 2016 at 01:40:02PM +0200, Vincent Abriou wrote:
> When a plane is going to be enabled we re-evaluate the possible crtcs
> for the associated drm plane. Only the crtc on which the plane should be
> displayed is considered possible until the plane is disabled.
> Indeed STI hardware does not allow to dynamically change
> the plane's crtc/mixer assignment when the plane is in use (gdp is
> running).
>
> Signed-off-by: Vincent Abriou <vincent.abriou@xxxxxx>
> ---
> drivers/gpu/drm/sti/sti_gdp.c | 15 +++++++++++++++
> drivers/gpu/drm/sti/sti_plane.h | 2 ++
> 2 files changed, 17 insertions(+)
>
> diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c
> index 3fc62c1..f7cd671 100644
> --- a/drivers/gpu/drm/sti/sti_gdp.c
> +++ b/drivers/gpu/drm/sti/sti_gdp.c
> @@ -71,6 +71,9 @@ static struct gdp_format_to_str {
> #define GDP_NODE_NB_BANK 2
> #define GDP_NODE_PER_FIELD 2
>
> +#define MAIN_CRTC_MASK BIT(0)
> +#define AUX_CRTC_MASK BIT(1)
> +
> struct sti_gdp_node {
> u32 gam_gdp_ctl;
> u32 gam_gdp_agc;
> @@ -690,6 +693,12 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_plane,
> }
> }
>
> + /* re-evaluate the possible crtcs */
> + if (mixer->id == STI_MIXER_MAIN)
> + drm_plane->possible_crtcs = MAIN_CRTC_MASK;
> + else
> + drm_plane->possible_crtcs = AUX_CRTC_MASK;
This stuff isn't meant to be changed dynamically. There's no event for
telling userspace to re-examine this sort of information.
> +
> DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
> crtc->base.id, sti_mixer_to_str(mixer),
> drm_plane->base.id, sti_plane_to_str(plane));
> @@ -846,6 +855,9 @@ static void sti_gdp_atomic_disable(struct drm_plane *drm_plane,
> {
> struct sti_plane *plane = to_sti_plane(drm_plane);
>
> + /* restore possible crtcs value with the initial value */
> + drm_plane->possible_crtcs = plane->init_possible_crtcs;
> +
> if (!drm_plane->crtc) {
> DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
> drm_plane->base.id);
> @@ -917,6 +929,9 @@ struct drm_plane *sti_gdp_create(struct drm_device *drm_dev,
>
> sti_gdp_init(gdp);
>
> + /* store the initial value of possible crtcs */
> + gdp->plane.init_possible_crtcs = possible_crtcs;
> +
> res = drm_universal_plane_init(drm_dev, &gdp->plane.drm_plane,
> possible_crtcs,
> &sti_gdp_plane_helpers_funcs,
> diff --git a/drivers/gpu/drm/sti/sti_plane.h b/drivers/gpu/drm/sti/sti_plane.h
> index ce3e8d6..70c5312 100644
> --- a/drivers/gpu/drm/sti/sti_plane.h
> +++ b/drivers/gpu/drm/sti/sti_plane.h
> @@ -66,12 +66,14 @@ struct sti_fps_info {
> * @plane: drm plane it is bound to (if any)
> * @desc: plane type & id
> * @status: to know the status of the plane
> + * @init_possile_crtcs: store the initial possible crtc value
> * @fps_info: frame per second info
> */
> struct sti_plane {
> struct drm_plane drm_plane;
> enum sti_plane_desc desc;
> enum sti_plane_status status;
> + u32 init_possible_crtcs;
> struct sti_fps_info fps_info;
> };
>
> --
> 1.9.1
>
> _______________________________________________
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> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Ville Syrjälä
Intel OTC
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