Re: [RFC PATCH V0 01/10] media: mtk-mdp3: Add Mediatek MDP Driver

[Chun-Kuang Hu <chunkuang.hu@kernel.org>]

Hi, Moudy:

Moudy Ho <moudy.ho@mediatek.com> 於 2021年6月23日 週三 下午3:46寫道：
>
> From: mtk18742 <moudy.ho@mediatek.com>
>
> Add MDP driver for MT8183
>
> Signed-off-by: Moudy Ho <moudy.ho@mediatek.com>
> ---

[snip]

> +
> +#endif  // __MMSYS_CONFIG_H__
> diff --git a/drivers/media/platform/mtk-mdp3/mmsys_mutex.h b/drivers/media/platform/mtk-mdp3/mmsys_mutex.h
> new file mode 100644
> index 000000000000..fb8c179f11af
> --- /dev/null
> +++ b/drivers/media/platform/mtk-mdp3/mmsys_mutex.h
> @@ -0,0 +1,35 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2019 MediaTek Inc.
> + * Author: Ping-Hsun Wu <ping-hsun.wu@mediatek.com>
> + */
> +
> +#ifndef __MMSYS_MUTEX_H__
> +#define __MMSYS_MUTEX_H__
> +
> +#include "mmsys_reg_base.h"
> +#include "mdp-platform.h"
> +
> +#define MM_MUTEX_INTEN              0x00
> +#define MM_MUTEX_INTSTA             0x04
> +#define MM_MUTEX_CFG                0x08
> +
> +#define MM_MUTEX_EN                 (0x20 + mutex_id * 0x20)
> +#define MM_MUTEX_GET                (0x24 + mutex_id * 0x20)
> +#define MM_MUTEX_RST                (0x28 + mutex_id * 0x20)
> +#define MM_MUTEX_MOD                (MM_MUTEX_MOD_OFFSET + mutex_id * 0x20)
> +#define MM_MUTEX_SOF                (MM_MUTEX_SOF_OFFSET + mutex_id * 0x20)

mtk_mutex driver is in drivers/soc/mediatek/mtk-mutex.c, so the
mtk_mutex control should be placed there.

> +
> +// MASK
> +#define MM_MUTEX_INTEN_MASK         0x0fff
> +#define MM_MUTEX_INTSTA_MASK        0x0fff
> +#define MM_MUTEX_DEBUG_OUT_SEL_MASK 0x03
> +#define MM_MUTEX_CFG_MASK           0x01
> +
> +#define MM_MUTEX_EN_MASK            0x01
> +#define MM_MUTEX_GET_MASK           0x03
> +#define MM_MUTEX_RST_MASK           0x01
> +#define MM_MUTEX_MOD_MASK           0x07ffffff
> +#define MM_MUTEX_SOF_MASK           0x0f
> +

[snip]

> +int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
> +{
> +       struct mdp_cmd cmd;
> +       struct mdp_path path;
> +       int i, ret;
> +
> +       if (atomic_read(&mdp->suspended))
> +               return -ECANCELED;
> +
> +       atomic_inc(&mdp->job_count);
> +
> +       cmd.pkt = cmdq_pkt_create(mdp->cmdq_clt, SZ_16K);
> +       if (IS_ERR(cmd.pkt)) {
> +               atomic_dec(&mdp->job_count);
> +               wake_up(&mdp->callback_wq);
> +               return PTR_ERR(cmd.pkt);
> +       }
> +       cmd.event = &mdp->event[0];
> +
> +       path.mdp_dev = mdp;
> +       path.config = param->config;
> +       path.param = param->param;
> +       for (i = 0; i < param->param->num_outputs; i++) {
> +               path.bounds[i].left = 0;
> +               path.bounds[i].top = 0;
> +               path.bounds[i].width =
> +                       param->param->outputs[i].buffer.format.width;
> +               path.bounds[i].height =
> +                       param->param->outputs[i].buffer.format.height;
> +               path.composes[i] = param->composes[i] ?
> +                       param->composes[i] : &path.bounds[i];
> +       }
> +       ret = mdp_path_config(mdp, &cmd, &path);
> +       if (ret) {
> +               atomic_dec(&mdp->job_count);
> +               wake_up(&mdp->callback_wq);
> +               return ret;
> +       }
> +
> +       // TODO: engine conflict dispatch
> +       for (i = 0; i < param->config->num_components; i++)
> +               mdp_comp_clock_on(&mdp->pdev->dev, path.comps[i].comp);
> +
> +       if (param->wait) {
> +               ret = cmdq_pkt_flush(cmd.pkt);

cmdq_pkt_flush() is removed in latest kernel, please rebase this
series onto latest kernel before you send patches.

Regards,
Chun-Kuang.

> +#ifdef MDP_DEBUG
> +               if (ret) {
> +                       struct mdp_func_struct *p_func = mdp_get_func();
> +
> +                       p_func->mdp_dump_mmsys_config();
> +                       mdp_dump_info(~0, 1);
> +               }
> +#endif
> +               if (param->mdp_ctx)
> +                       mdp_m2m_job_finish(param->mdp_ctx);
> +               cmdq_pkt_destroy(cmd.pkt);
> +               for (i = 0; i < param->config->num_components; i++)
> +                       mdp_comp_clock_off(&mdp->pdev->dev, path.comps[i].comp);
> +
> +               atomic_dec(&mdp->job_count);
> +               wake_up(&mdp->callback_wq);
> +       } else {
> +               struct mdp_cmdq_cb_param *cb_param;
> +               struct mdp_comp *comps;
> +
> +               cb_param = kzalloc(sizeof(*cb_param), GFP_KERNEL);
> +               if (!cb_param)
> +                       return -ENOMEM;
> +               comps = kcalloc(param->config->num_components, sizeof(*comps),
> +                               GFP_KERNEL);
> +               if (!comps) {
> +                       kfree(cb_param);
> +                       mdp_err("%s:comps alloc fail!\n", __func__);
> +                       return -ENOMEM;
> +               }
> +
> +               for (i = 0; i < param->config->num_components; i++)
> +                       memcpy(&comps[i], path.comps[i].comp,
> +                              sizeof(struct mdp_comp));
> +               cb_param->mdp = mdp;
> +               cb_param->user_cmdq_cb = param->cmdq_cb;
> +               cb_param->user_cb_data = param->cb_data;
> +               cb_param->pkt = cmd.pkt;
> +               cb_param->comps = comps;
> +               cb_param->num_comps = param->config->num_components;
> +               cb_param->mdp_ctx = param->mdp_ctx;
> +
> +               ret = cmdq_pkt_flush_async(cmd.pkt,
> +                                          mdp_handle_cmdq_callback,
> +                                          (void *)cb_param);
> +               if (ret) {
> +                       mdp_err("%s:cmdq_pkt_flush_async fail!\n", __func__);
> +                       kfree(cb_param);
> +                       kfree(comps);
> +               }
> +       }
> +       return ret;
> +}
> +

> --
> 2.18.0
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