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SubjectRe: [PATCH v5 3/5] media: Add Mediatek MDP Driver
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On 08/30/2016 02:25 PM, Minghsiu Tsai wrote:
> Add MDP driver for MT8173
>
> Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
> ---
> drivers/media/platform/Kconfig | 17 +
> drivers/media/platform/Makefile | 2 +
> drivers/media/platform/mtk-mdp/Makefile | 9 +
> drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 159 ++++
> drivers/media/platform/mtk-mdp/mtk_mdp_comp.h | 72 ++
> drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 294 ++++++
> drivers/media/platform/mtk-mdp/mtk_mdp_core.h | 260 +++++
> drivers/media/platform/mtk-mdp/mtk_mdp_ipi.h | 126 +++
> drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c | 1270 +++++++++++++++++++++++++
> drivers/media/platform/mtk-mdp/mtk_mdp_m2m.h | 22 +
> drivers/media/platform/mtk-mdp/mtk_mdp_regs.c | 152 +++
> drivers/media/platform/mtk-mdp/mtk_mdp_regs.h | 31 +
> drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c | 145 +++
> drivers/media/platform/mtk-mdp/mtk_mdp_vpu.h | 41 +
> 14 files changed, 2600 insertions(+)
> create mode 100644 drivers/media/platform/mtk-mdp/Makefile
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_core.h
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_ipi.h
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_m2m.h
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_regs.c
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_regs.h
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c
> create mode 100644 drivers/media/platform/mtk-mdp/mtk_mdp_vpu.h
>

<snip>

> +static inline bool mtk_mdp_is_target_compose(u32 target)
> +{
> + if (target == V4L2_SEL_TGT_COMPOSE_DEFAULT
> + || target == V4L2_SEL_TGT_COMPOSE_BOUNDS
> + || target == V4L2_SEL_TGT_COMPOSE)
> + return true;
> + return false;
> +}
> +
> +static inline bool mtk_mdp_is_target_crop(u32 target)
> +{
> + if (target == V4L2_SEL_TGT_CROP_DEFAULT
> + || target == V4L2_SEL_TGT_CROP_BOUNDS
> + || target == V4L2_SEL_TGT_CROP)
> + return true;
> + return false;
> +}
> +
> +static int mtk_mdp_m2m_g_selection(struct file *file, void *fh,
> + struct v4l2_selection *s)
> +{
> + struct mtk_mdp_frame *frame;
> + struct mtk_mdp_ctx *ctx = fh_to_ctx(fh);
> + bool valid = false;
> +
> + if (s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + if (mtk_mdp_is_target_compose(s->target))
> + valid = true;
> + } else if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
> + if (mtk_mdp_is_target_crop(s->target))
> + valid = true;
> + }
> + if (!valid) {
> + mtk_mdp_dbg(1, "[%d] invalid type:%d,%u", ctx->id, s->type,
> + s->target);
> + return -EINVAL;
> + }
> +
> + frame = mtk_mdp_ctx_get_frame(ctx, s->type);
> +
> + switch (s->target) {
> + case V4L2_SEL_TGT_COMPOSE_DEFAULT:
> + case V4L2_SEL_TGT_COMPOSE_BOUNDS:
> + case V4L2_SEL_TGT_CROP_BOUNDS:
> + case V4L2_SEL_TGT_CROP_DEFAULT:
> + s->r.left = 0;
> + s->r.top = 0;
> + s->r.width = frame->width;
> + s->r.height = frame->height;
> + return 0;
> +
> + case V4L2_SEL_TGT_COMPOSE:
> + case V4L2_SEL_TGT_CROP:
> + s->r.left = frame->crop.left;
> + s->r.top = frame->crop.top;
> + s->r.width = frame->crop.width;
> + s->r.height = frame->crop.height;
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int mtk_mdp_check_scaler_ratio(struct mtk_mdp_variant *var, int src_w,
> + int src_h, int dst_w, int dst_h, int rot)
> +{
> + int tmp_w, tmp_h;
> +
> + if (rot == 90 || rot == 270) {
> + tmp_w = dst_h;
> + tmp_h = dst_w;
> + } else {
> + tmp_w = dst_w;
> + tmp_h = dst_h;
> + }
> +
> + if ((src_w / tmp_w) > var->h_scale_down_max ||
> + (src_h / tmp_h) > var->v_scale_down_max ||
> + (tmp_w / src_w) > var->h_scale_up_max ||
> + (tmp_h / src_h) > var->v_scale_up_max)
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static int mtk_mdp_m2m_s_selection(struct file *file, void *fh,
> + struct v4l2_selection *s)
> +{
> + struct mtk_mdp_frame *frame;
> + struct mtk_mdp_ctx *ctx = fh_to_ctx(fh);
> + struct v4l2_rect new_r;
> + struct mtk_mdp_variant *variant = ctx->mdp_dev->variant;
> + int ret;
> + bool valid = false;
> +
> + if (s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + if (mtk_mdp_is_target_compose(s->target))
> + valid = true;
> + } else if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
> + if (mtk_mdp_is_target_crop(s->target))
> + valid = true;
> + }

These tests are wrong: you can't set the _DEFAULT and _BOUNDS targets.
Those are read-only. It's easiest to just explicitly check for _CROP or
_COMPOSE here.

I've added a check to v4l2-compliance to test for this.

> + if (!valid) {
> + mtk_mdp_dbg(1, "[%d] invalid type:%d,%u", ctx->id, s->type,
> + s->target);
> + return -EINVAL;
> + }
> +
> + new_r = s->r;
> + ret = mtk_mdp_try_crop(ctx, s->type, &new_r);
> + if (ret)
> + return ret;
> +
> + if (mtk_mdp_is_target_crop(s->target))
> + frame = &ctx->s_frame;
> + else
> + frame = &ctx->d_frame;
> +
> + /* Check to see if scaling ratio is within supported range */
> + if (mtk_mdp_ctx_state_is_set(ctx, MTK_MDP_DST_FMT | MTK_MDP_SRC_FMT)) {
> + if (V4L2_TYPE_IS_OUTPUT(s->type)) {
> + ret = mtk_mdp_check_scaler_ratio(variant, new_r.width,
> + new_r.height, ctx->d_frame.crop.width,
> + ctx->d_frame.crop.height,
> + ctx->ctrls.rotate->val);
> + } else {
> + ret = mtk_mdp_check_scaler_ratio(variant,
> + ctx->s_frame.crop.width,
> + ctx->s_frame.crop.height, new_r.width,
> + new_r.height, ctx->ctrls.rotate->val);
> + }
> +
> + if (ret) {
> + dev_info(&ctx->mdp_dev->pdev->dev,
> + "Out of scaler range");
> + return -EINVAL;
> + }
> + }
> +
> + s->r = new_r;
> + frame->crop = new_r;
> +
> + return 0;
> +}


Regards,

Hans

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