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Date: Thu, 3 Mar 2022 18:01:58 +0800
From: CK Hu <ck.hu@...iatek.com>
To: Moudy Ho <moudy.ho@...iatek.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
"Jernej Skrabec" <jernej.skrabec@...l.net>
CC: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Rob Landley <rob@...dley.net>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
<linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
Alexandre Courbot <acourbot@...omium.org>,
<tfiga@...omium.org>, <drinkcat@...omium.org>,
<pihsun@...omium.org>, <hsinyi@...gle.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Maoguang Meng <maoguang.meng@...iatek.com>,
daoyuan huang <daoyuan.huang@...iatek.com>,
Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
<menghui.lin@...iatek.com>, <sj.huang@...iatek.com>,
<allen-kh.cheng@...iatek.com>, <randy.wu@...iatek.com>,
<jason-jh.lin@...iatek.com>, <roy-cw.yeh@...iatek.com>,
<river.cheng@...iatek.com>, <srv_heupstream@...iatek.com>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH v12 4/4] soc: mediatek: mutex: add functions that
operate registers by CMDQ
Hi, Moudy:
On Tue, 2022-03-01 at 18:02 +0800, Moudy Ho wrote:
> Considering that some functions have timing requirements
> in specific situation, this patch adds several interface that
> operate registers by CMDQ.
>
> Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> ---
> drivers/soc/mediatek/mtk-mutex.c | 72
> +++++++++++++++++++++++++-
> include/linux/soc/mediatek/mtk-mutex.h | 6 +++
> 2 files changed, 76 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-mutex.c
> b/drivers/soc/mediatek/mtk-mutex.c
> index a6268ecde240..a45864183cd1 100644
> --- a/drivers/soc/mediatek/mtk-mutex.c
> +++ b/drivers/soc/mediatek/mtk-mutex.c
> @@ -7,10 +7,14 @@
> #include <linux/iopoll.h>
> #include <linux/module.h>
> #include <linux/of_device.h>
> +#include <linux/of_address.h>
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
> #include <linux/soc/mediatek/mtk-mmsys.h>
> #include <linux/soc/mediatek/mtk-mutex.h>
> +#include <linux/soc/mediatek/mtk-cmdq.h>
> +
> +#define MTK_MUTEX_ENABLE BIT(0)
>
> #define MT2701_MUTEX0_MOD0 0x2c
> #define MT2701_MUTEX0_SOF0 0x30
> @@ -173,6 +177,7 @@ struct mtk_mutex_data {
> const unsigned int mutex_mdp_mod_mask;
> const unsigned int mutex_mdp_sof_mask;
> const bool no_clk;
> + const bool has_gce_client_reg;
> };
>
> struct mtk_mutex_ctx {
> @@ -181,6 +186,8 @@ struct mtk_mutex_ctx {
> void __iomem *regs;
> struct mtk_mutex mutex[10];
> const struct mtk_mutex_data *data;
> + phys_addr_t addr;
> + struct cmdq_client_reg cmdq_reg;
> };
>
> static const unsigned int mt2701_mutex_mod[DDP_COMPONENT_ID_MAX] = {
> @@ -374,6 +381,7 @@ static const struct mtk_mutex_data
> mt8183_mutex_driver_data = {
> .mutex_mdp_mod_mask = MT8183_MUTEX_MDP_MOD_MASK,
> .mutex_mdp_sof_mask = MT8183_MUTEX_MDP_SOF_MASK,
> .no_clk = true,
> + .has_gce_client_reg = true,
> };
>
> static const struct mtk_mutex_data mt8186_mutex_driver_data = {
> @@ -553,6 +561,25 @@ u32 mtk_mutex_get_mdp_mod(struct mtk_mutex
> *mutex, enum mtk_mdp_comp_id id)
> }
> EXPORT_SYMBOL_GPL(mtk_mutex_get_mdp_mod);
>
> +void mtk_mutex_add_mod_by_cmdq(struct mtk_mutex *mutex, u32 mod,
> + struct mmsys_cmdq_cmd *cmd)
> +{
> + struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> + mutex[mutex->id]);
> + unsigned int offset;
> +
> + WARN_ON(&mtx->mutex[mutex->id] != mutex);
> +
> + offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg, mutex-
> >id);
> + cmdq_pkt_write_mask(cmd->pkt, mtx->cmdq_reg.subsys, mtx->addr +
> offset,
> + mod, mtx->data->mutex_mdp_mod_mask);
> +
> + offset = DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg, mutex-
> >id);
> + cmdq_pkt_write_mask(cmd->pkt, mtx->cmdq_reg.subsys, mtx->addr +
> offset,
> + 0, mtx->data->mutex_mdp_sof_mask);
> +}
> +EXPORT_SYMBOL_GPL(mtk_mutex_add_mod_by_cmdq);
> +
> void mtk_mutex_enable(struct mtk_mutex *mutex)
> {
> struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> @@ -564,6 +591,20 @@ void mtk_mutex_enable(struct mtk_mutex *mutex)
> }
> EXPORT_SYMBOL_GPL(mtk_mutex_enable);
>
> +void mtk_mutex_enable_by_cmdq(struct mtk_mutex *mutex,
> + struct mmsys_cmdq_cmd *cmd)
There are 10 mutex and you could bind each pipeline to one mutex and
always enable it. I think it's not necessary to frequently
enable/disable mutex.
> +{
> + struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> + mutex[mutex->id]);
> +
> + WARN_ON(&mtx->mutex[mutex->id] != mutex);
> +
> + cmdq_pkt_write_mask(cmd->pkt, mtx->cmdq_reg.subsys,
> + mtx->addr + DISP_REG_MUTEX_EN(mutex->id),
> + MTK_MUTEX_ENABLE, MTK_MUTEX_ENABLE);
> +}
> +EXPORT_SYMBOL_GPL(mtk_mutex_enable_by_cmdq);
> +
> void mtk_mutex_disable(struct mtk_mutex *mutex)
> {
> struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> @@ -575,6 +616,20 @@ void mtk_mutex_disable(struct mtk_mutex *mutex)
> }
> EXPORT_SYMBOL_GPL(mtk_mutex_disable);
>
> +void mtk_mutex_disable_by_cmdq(struct mtk_mutex *mutex,
> + struct mmsys_cmdq_cmd *cmd)
> +{
> + struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> + mutex[mutex->id]);
> +
> + WARN_ON(&mtx->mutex[mutex->id] != mutex);
> +
> + cmdq_pkt_write_mask(cmd->pkt, mtx->cmdq_reg.subsys,
> + mtx->addr + DISP_REG_MUTEX_EN(mutex->id),
> + 0x0, MTK_MUTEX_ENABLE);
> +}
> +EXPORT_SYMBOL_GPL(mtk_mutex_disable_by_cmdq);
> +
> void mtk_mutex_acquire(struct mtk_mutex *mutex)
> {
> struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> @@ -602,8 +657,8 @@ static int mtk_mutex_probe(struct platform_device
> *pdev)
> {
> struct device *dev = &pdev->dev;
> struct mtk_mutex_ctx *mtx;
> - struct resource *regs;
> - int i;
> + struct resource *regs, addr;
> + int i, ret;
>
> mtx = devm_kzalloc(dev, sizeof(*mtx), GFP_KERNEL);
> if (!mtx)
> @@ -623,6 +678,19 @@ static int mtk_mutex_probe(struct
> platform_device *pdev)
> }
> }
>
> + if (of_address_to_resource(dev->of_node, 0, &addr) < 0)
> + mtx->addr = 0L;
> + else
> + mtx->addr = addr.start;
> +
> + if (mtx->data->has_gce_client_reg) {
> + ret = cmdq_dev_get_client_reg(dev, &mtx->cmdq_reg, 0);
Add gce client reg in binding document [1]
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/display/mediatek/mediatek,mutex.yaml?h=next-20220302
Regards,
CK
> + if (ret) {
> + dev_err(dev, "No mediatek,gce-client-reg!\n");
> + return ret;
> + }
> + }
> +
> regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> mtx->regs = devm_ioremap_resource(dev, regs);
> if (IS_ERR(mtx->regs)) {
> diff --git a/include/linux/soc/mediatek/mtk-mutex.h
> b/include/linux/soc/mediatek/mtk-mutex.h
> index b2608f4220ee..05de7ad4a124 100644
> --- a/include/linux/soc/mediatek/mtk-mutex.h
> +++ b/include/linux/soc/mediatek/mtk-mutex.h
> @@ -17,8 +17,14 @@ int mtk_mutex_prepare(struct mtk_mutex *mutex);
> void mtk_mutex_add_comp(struct mtk_mutex *mutex,
> enum mtk_ddp_comp_id id);
> u32 mtk_mutex_get_mdp_mod(struct mtk_mutex *mutex, enum
> mtk_mdp_comp_id id);
> +void mtk_mutex_add_mod_by_cmdq(struct mtk_mutex *mutex, u32 mod,
> + struct mmsys_cmdq_cmd *cmd);
> void mtk_mutex_enable(struct mtk_mutex *mutex);
> +void mtk_mutex_enable_by_cmdq(struct mtk_mutex *mutex,
> + struct mmsys_cmdq_cmd *cmd);
> void mtk_mutex_disable(struct mtk_mutex *mutex);
> +void mtk_mutex_disable_by_cmdq(struct mtk_mutex *mutex,
> + struct mmsys_cmdq_cmd *cmd);
> void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
> enum mtk_ddp_comp_id id);
> void mtk_mutex_unprepare(struct mtk_mutex *mutex);
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