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Date: Thu, 28 Oct 2021 11:14:50 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: "roy-cw.yeh" <roy-cw.yeh@...iatek.com>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
Fabien Parent <fparent@...libre.com>,
"jason-jh . lin" <jason-jh.lin@...iatek.com>,
daoyuan huang <daoyuan.huang@...iatek.com>,
Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
Moudy Ho <moudy.ho@...iatek.com>,
"river . cheng" <river.cheng@...iatek.com>,
Yongqiang Niu <yongqiang.niu@...iatek.com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v1] media: platform: mtk-mdp3: Revise frame change
criteria
Il 28/10/21 06:09, roy-cw.yeh ha scritto:
> From: "Roy-CW.Yeh" <roy-cw.yeh@...iatek.com>
>
> frame_change will trigger MDP SCP to re-calculate path and parameter.
> MDP fails when it doesn't get correct parameter to process frame.
> frame_change raises when size change occurs
> no matter it happens in input or output frame
>
> Signed-off-by: Roy-CW.Yeh <roy-cw.yeh@...iatek.com>
> ---
> This patch is based on [1]
> [1] Reconfigure SHM to improve performance
> - https://patchwork.kernel.org/project/linux-mediatek/patch/20211022092827.24631-3-roy-cw.yeh@mediatek.com/
> ---
> .../media/platform/mtk-mdp3/mtk-mdp3-core.h | 2 +
> .../media/platform/mtk-mdp3/mtk-mdp3-m2m.c | 20 ++++----
> .../media/platform/mtk-mdp3/mtk-mdp3-regs.c | 50 +++++++++++++++++++
> .../media/platform/mtk-mdp3/mtk-mdp3-regs.h | 8 +++
> 4 files changed, 71 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.h b/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.h
> index 737082093997..0d2b86019723 100644
> --- a/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.h
> +++ b/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.h
> @@ -11,6 +11,7 @@
> #include <media/v4l2-mem2mem.h>
> #include <linux/soc/mediatek/mtk-mmsys.h>
> #include <linux/soc/mediatek/mtk-mutex.h>
> +#include "mtk-mdp3-regs.h"
> #include "mtk-mdp3-comp.h"
> #include "mtk-mdp3-vpu.h"
>
> @@ -107,6 +108,7 @@ struct mdp_dev {
> atomic_t cmdq_count;
> struct mdp_cmdq_pkt_pool *cmdq_pool;
> struct mdp_cmdq_pkt_pool *cmdq_d_pool;
> + struct mdp_framechange_param prev_image;
> };
>
> struct mdp_pipe_info {
> diff --git a/drivers/media/platform/mtk-mdp3/mtk-mdp3-m2m.c b/drivers/media/platform/mtk-mdp3/mtk-mdp3-m2m.c
> index 4684bb3718d3..6cd7bd610715 100644
> --- a/drivers/media/platform/mtk-mdp3/mtk-mdp3-m2m.c
> +++ b/drivers/media/platform/mtk-mdp3/mtk-mdp3-m2m.c
> @@ -98,8 +98,8 @@ static void mdp_m2m_worker(struct work_struct *work)
> struct vb2_v4l2_buffer *src_vb, *dst_vb;
> struct img_ipi_frameparam param = {0};
> struct mdp_cmdq_param task = {0};
> + struct mdp_framechange_param cur_frame = {0};
> enum vb2_buffer_state vb_state = VB2_BUF_STATE_ERROR;
> - static u8 prev_scenario;
> int ret;
>
> if (mdp_m2m_ctx_is_state_set(ctx, MDP_M2M_CTX_ERROR)) {
> @@ -118,21 +118,23 @@ static void mdp_m2m_worker(struct work_struct *work)
> mdp_set_src_config(¶m.inputs[0], frame, &src_vb->vb2_buf);
> mdp_set_scenario(ctx->mdp_dev, ¶m, frame);
>
> - if (prev_scenario != param.type) {
> - prev_scenario = param.type;
> + frame = ctx_get_frame(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
> + dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
> + mdp_set_dst_config(¶m.outputs[0], frame, &dst_vb->vb2_buf);
> +
> + cur_frame.scenario = param.type;
> + memcpy(&cur_frame.in, ¶m.inputs[0], sizeof(cur_frame.in));
> + memcpy(&cur_frame.out, ¶m.outputs[0], sizeof(cur_frame.out));
> +
> + if (mdp_get_framechange(ctx->mdp_dev, &cur_frame))
> param.frame_change = true;
> - } else {
> + else
> param.frame_change = (ctx->frame_count == 0) ? true : false;
> - }
>
> if (param.frame_change)
> dev_info(&ctx->mdp_dev->pdev->dev,
> "MDP Scenario: %d\n", param.type);
>
> - frame = ctx_get_frame(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
> - dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
> - mdp_set_dst_config(¶m.outputs[0], frame, &dst_vb->vb2_buf);
> -
> dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
> param.timestamp = src_vb->vb2_buf.timestamp;
>
> diff --git a/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c b/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c
> index 91c5e35947d3..e182d27a1c3f 100644
> --- a/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c
> +++ b/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c
> @@ -434,6 +434,56 @@ static u32 mdp_fmt_get_plane_size(const struct mdp_format *fmt,
> return 0;
> }
>
> +int mdp_get_framechange(struct mdp_dev *mdp,
> + struct mdp_framechange_param *cur)
This function is returning 0 or 1, so it would be more appropriate to return
a bool instead.
> +{
> + int ret = 0;
This would also be a bool.
> + struct mdp_framechange_param *prev;
> +
> + prev = &mdp->prev_image;
> + if (prev->scenario != cur->scenario)
> + ret = true;
> +
> + if (prev->in.buffer.format.width != cur->in.buffer.format.width ||
It's useless to perform other checks if you've already determined that
ret = true... so I think you should aggregate all checks in one big
conditional.
if ( (prev->scenario != cur->scenario) ||
/* Input buffers */
(prev->in.buffer............ || .... ) ||
/* Output buffers */
(.....) ) {
ret = true;
}
> + prev->in.buffer.format.height != cur->in.buffer.format.height)
> + ret = true;
> +
> + if (prev->out.buffer.format.width != cur->out.buffer.format.width ||
> + prev->out.buffer.format.height != cur->out.buffer.format.height)
> + ret = true;
> +
> + if (prev->out.crop.left != cur->out.crop.left ||
> + prev->out.crop.top != cur->out.crop.top ||
> + prev->out.crop.width != cur->out.crop.width ||
> + prev->out.crop.height != cur->out.crop.height)
> + ret = true;
> +
> + dev_dbg(&mdp->pdev->dev,
> + "prev[%d] [%d, %d], [%d, %d], [%d, %d, %d, %d]\n", prev->scenario,
> + prev->in.buffer.format.width,
> + prev->in.buffer.format.height,
> + prev->out.buffer.format.width,
> + prev->out.buffer.format.height,
> + prev->out.crop.left,
> + prev->out.crop.top,
> + prev->out.crop.width,
> + prev->out.crop.height);
> +
> + dev_dbg(&mdp->pdev->dev,
> + "cur[%d] [%d, %d], [%d, %d], [%d, %d, %d, %d]\n", cur->scenario,
> + cur->in.buffer.format.width,
> + cur->in.buffer.format.height,
> + cur->out.buffer.format.width,
> + cur->out.buffer.format.height,
> + cur->out.crop.left,
> + cur->out.crop.top,
> + cur->out.crop.width,
> + cur->out.crop.height);
> +
> + memcpy(prev, cur, sizeof(struct mdp_framechange_param));
> + return ret;
> +}
> +
> void mdp_set_scenario(struct mdp_dev *mdp,
> struct img_ipi_frameparam *param,
> struct mdp_frame *frame)
> diff --git a/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.h b/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.h
> index 7979ad60ab87..2d0b3e77f959 100644
> --- a/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.h
> +++ b/drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.h
> @@ -329,6 +329,12 @@ struct mdp_frameparam {
> enum v4l2_quantization quant;
> };
>
> +struct mdp_framechange_param {
> + u8 scenario;
> + struct img_input in;
> + struct img_output out;
> +};
> +
> int mdp_enum_fmt_mplane(struct mdp_dev *mdp, struct v4l2_fmtdesc *f);
> const struct mdp_format *mdp_try_fmt_mplane(struct mdp_dev *mdp,
> struct v4l2_format *f,
> @@ -341,6 +347,8 @@ int mdp_try_crop(struct v4l2_rect *r, const struct v4l2_selection *s,
> int mdp_check_scaling_ratio(const struct v4l2_rect *crop,
> const struct v4l2_rect *compose, s32 rotation,
> const struct mdp_limit *limit);
> +int mdp_get_framechange(struct mdp_dev *mdp,
> + struct mdp_framechange_param *cur);
> void mdp_set_scenario(struct mdp_dev *mdp,
> struct img_ipi_frameparam *param,
> struct mdp_frame *frame);
>
Regards,
- Angelo
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