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SubjectRe: [PATCH v5, 22/32] drm/mediatek: add ovl0/ovl_2l0 usecase
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Hi, Yongqiang:

On Thu, 2019-08-29 at 22:50 +0800, yongqiang.niu@mediatek.com wrote:
> From: Yongqiang Niu <yongqiang.niu@mediatek.com>
>
> This patch add ovl0/ovl_2l0 usecase
> in ovl->ovl_2l0 direct link usecase:
> 1. the crtc support layer number will 4+2
> 2. ovl_2l0 background color input select ovl0 when crtc init
> and disable it when crtc finish
> 3. config ovl_2l0 layer, if crtc config layer number is
> bigger than ovl0 support layers(max is 4)
>

Applied to mediatek-drm-next-5.5 [1] with some modification by my
comment, thanks.

[1]
https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-next-5.5

Regards,
CK

> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 38 +++++++++++++++++++++++++++++++--
> 1 file changed, 36 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index c63ff2b..b55970a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -270,6 +270,15 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
>
> for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
> struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
> + enum mtk_ddp_comp_id prev;
> +
> + if (i > 0)
> + prev = mtk_crtc->ddp_comp[i - 1]->id;
> + else
> + prev = DDP_COMPONENT_ID_MAX;
> +
> + if (prev == DDP_COMPONENT_OVL0)
> + mtk_ddp_comp_bgclr_in_on(comp);
>
> mtk_ddp_comp_config(comp, width, height, vrefresh, bpc);
> mtk_ddp_comp_start(comp);
> @@ -279,9 +288,18 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
> for (i = 0; i < mtk_crtc->layer_nr; i++) {
> struct drm_plane *plane = &mtk_crtc->planes[i];
> struct mtk_plane_state *plane_state;
> + struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
> + unsigned int comp_layer_nr = mtk_ddp_comp_layer_nr(comp);
> + unsigned int local_layer;
>
> plane_state = to_mtk_plane_state(plane->state);
> - mtk_ddp_comp_layer_config(mtk_crtc->ddp_comp[0], i,
> +
> + if (i >= comp_layer_nr) {
> + comp = mtk_crtc->ddp_comp[1];
> + local_layer = i - comp_layer_nr;
> + } else
> + local_layer = i;
> + mtk_ddp_comp_layer_config(comp, local_layer,
> plane_state);
> }
>
> @@ -307,6 +325,7 @@ static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
> mtk_crtc->ddp_comp[i]->id);
> mtk_disp_mutex_disable(mtk_crtc->mutex);
> for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
> + mtk_ddp_comp_bgclr_in_off(mtk_crtc->ddp_comp[i]);
> mtk_ddp_remove_comp_from_path(mtk_crtc->config_regs,
> mtk_crtc->mmsys_reg_data,
> mtk_crtc->ddp_comp[i]->id,
> @@ -327,6 +346,8 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
> struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
> struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
> unsigned int i;
> + unsigned int comp_layer_nr = mtk_ddp_comp_layer_nr(comp);
> + unsigned int local_layer;
>
> /*
> * TODO: instead of updating the registers here, we should prepare
> @@ -349,7 +370,14 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
> plane_state = to_mtk_plane_state(plane->state);
>
> if (plane_state->pending.config) {
> - mtk_ddp_comp_layer_config(comp, i, plane_state);
> + if (i >= comp_layer_nr) {
> + comp = mtk_crtc->ddp_comp[1];
> + local_layer = i - comp_layer_nr;
> + } else
> + local_layer = i;
> +
> + mtk_ddp_comp_layer_config(comp, local_layer,
> + plane_state);
> plane_state->pending.config = false;
> }
> }
> @@ -572,6 +600,12 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> }
>
> mtk_crtc->layer_nr = mtk_ddp_comp_layer_nr(mtk_crtc->ddp_comp[0]);
> + if (mtk_crtc->ddp_comp_nr > 1) {
> + struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[1];
> +
> + if (comp->funcs->bgclr_in_on)
> + mtk_crtc->layer_nr += mtk_ddp_comp_layer_nr(comp);
> + }
> mtk_crtc->planes = devm_kcalloc(dev, mtk_crtc->layer_nr,
> sizeof(struct drm_plane),
> GFP_KERNEL);


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