Re: [PATCH v4 2/8] drm/mediatek: add component POSTMASK

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On Fri, 2021-01-29 at 16:32 +0800, Yongqiang Niu wrote:
> On Fri, 2021-01-29 at 16:18 +0800, CK Hu wrote:
> > Hi, Hsin-Yi:
> > 
> > On Fri, 2021-01-29 at 15:34 +0800, Hsin-Yi Wang wrote:
> > > From: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> > > 
> > > This patch add component POSTMASK,
> > > 
> > > Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> > > Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
> > > ---
> > >  drivers/gpu/drm/mediatek/Makefile            |   1 +
> > >  drivers/gpu/drm/mediatek/mtk_disp_drv.h      |   8 +
> > >  drivers/gpu/drm/mediatek/mtk_disp_postmask.c | 161 +++++++++++++++++++
> > >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c  |  11 ++
> > >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h  |   1 +
> > >  drivers/gpu/drm/mediatek/mtk_drm_drv.c       |   4 +-
> > >  drivers/gpu/drm/mediatek/mtk_drm_drv.h       |   1 +
> > >  7 files changed, 186 insertions(+), 1 deletion(-)
> > >  create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_postmask.c
> > > 
> > > diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> > > index b64674b944860..13a0eafabf9c0 100644
> > > --- a/drivers/gpu/drm/mediatek/Makefile
> > > +++ b/drivers/gpu/drm/mediatek/Makefile
> > > @@ -3,6 +3,7 @@
> > >  mediatek-drm-y := mtk_disp_color.o \
> > >  		  mtk_disp_gamma.o \
> > >  		  mtk_disp_ovl.o \
> > > +		  mtk_disp_postmask.o \
> > >  		  mtk_disp_rdma.o \
> > >  		  mtk_drm_crtc.o \
> > >  		  mtk_drm_ddp_comp.o \
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > > index 02191010699f8..d74e85db3fcdf 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > > @@ -37,6 +37,14 @@ void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state);
> > >  void mtk_gamma_start(struct device *dev);
> > >  void mtk_gamma_stop(struct device *dev);
> > >  
> > > +int mtk_postmask_clk_enable(struct device *dev);
> > > +void mtk_postmask_clk_disable(struct device *dev);
> > > +void mtk_postmask_config(struct device *dev, unsigned int w,
> > > +                      unsigned int h, unsigned int vrefresh,
> > > +                      unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > > +void mtk_postmask_start(struct device *dev);
> > > +void mtk_postmask_stop(struct device *dev);
> > > +
> > >  void mtk_ovl_bgclr_in_on(struct device *dev);
> > >  void mtk_ovl_bgclr_in_off(struct device *dev);
> > >  void mtk_ovl_bypass_shadow(struct device *dev);
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_postmask.c b/drivers/gpu/drm/mediatek/mtk_disp_postmask.c
> > > new file mode 100644
> > > index 0000000000000..d640cef9c15a4
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/mediatek/mtk_disp_postmask.c
> > > @@ -0,0 +1,161 @@
> > > +/*
> > > + * SPDX-License-Identifier:
> > > + *
> > > + * Copyright (c) 2020 MediaTek Inc.
> > 
> > 2021
> > 
> > > + */
> > > +
> > > +#include <linux/clk.h>
> > > +#include <linux/component.h>
> > > +#include <linux/module.h>
> > > +#include <linux/of_device.h>
> > > +#include <linux/pm_runtime.h>
> > > +#include <linux/of_irq.h>
> > > +#include <linux/platform_device.h>
> > > +#include <linux/soc/mediatek/mtk-cmdq.h>
> > > +
> > > +#include "mtk_disp_drv.h"
> > > +#include "mtk_drm_crtc.h"
> > > +#include "mtk_drm_ddp_comp.h"
> > > +
> > > +#define DISP_POSTMASK_EN			0x0000
> > > +#define POSTMASK_EN				BIT(0)
> > > +#define DISP_POSTMASK_CFG			0x0020
> > > +#define POSTMASK_RELAY_MODE			BIT(0)
> > > +#define DISP_POSTMASK_SIZE			0x0030
> > > +
> > > +struct mtk_disp_postmask_data {
> > > +	u32 reserved;
> > > +};
> > 
> > Useless, so remove.
> > 
> > > +
> > > +/**
> > > + * struct mtk_disp_postmask - DISP_postmask driver structure
> > > + * @ddp_comp - structure containing type enum and hardware resources
> > > + * @crtc - associated crtc to report irq events to
> > > + */
> > > +struct mtk_disp_postmask {
> > > +	struct clk *clk;
> > > +	void __iomem *regs;
> > > +	struct cmdq_client_reg cmdq_reg;
> > > +	const struct mtk_disp_postmask_data *data;
> > > +};
> > > +
> > > +int mtk_postmask_clk_enable(struct device *dev)
> > > +{
> > > +	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
> > > +
> > > +	return clk_prepare_enable(postmask->clk);
> > > +}
> > > +
> > > +void mtk_postmask_clk_disable(struct device *dev)
> > > +{
> > > +	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
> > > +
> > > +	clk_disable_unprepare(postmask->clk);
> > > +}
> > > +
> > > +void mtk_postmask_config(struct device *dev, unsigned int w,
> > > +			 unsigned int h, unsigned int vrefresh,
> > > +			 unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> > > +{
> > > +	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
> > > +
> > > +	mtk_ddp_write(cmdq_pkt, w << 16 | h, &postmask->cmdq_reg, postmask->regs,
> > > +		      DISP_POSTMASK_SIZE);
> > > +	mtk_ddp_write(cmdq_pkt, POSTMASK_RELAY_MODE, &postmask->cmdq_reg,
> > > +		      postmask->regs, DISP_POSTMASK_CFG);
> > > +}
> > > +
> > > +void mtk_postmask_start(struct device *dev)
> > > +{
> > > +	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
> > > +
> > > +	writel(POSTMASK_EN, postmask->regs + DISP_POSTMASK_EN);
> > > +}
> > > +
> > > +void mtk_postmask_stop(struct device *dev)
> > > +{
> > > +	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
> > > +
> > > +	writel_relaxed(0x0, postmask->regs + DISP_POSTMASK_EN);
> > > +}
> > > +
> > > +static int mtk_disp_postmask_bind(struct device *dev, struct device *master, void *data)
> > > +{
> > > +	return 0;
> > > +}
> > > +
> > > +static void mtk_disp_postmask_unbind(struct device *dev, struct device *master,
> > > +				  void *data)
> > > +{
> > > +}
> > > +
> > > +static const struct component_ops mtk_disp_postmask_component_ops = {
> > > +	.bind	= mtk_disp_postmask_bind,
> > > +	.unbind = mtk_disp_postmask_unbind,
> > > +};
> > > +
> > > +static int mtk_disp_postmask_probe(struct platform_device *pdev)
> > > +{
> > > +	struct device *dev = &pdev->dev;
> > > +	struct mtk_disp_postmask *priv;
> > > +	struct resource *res;
> > > +	int ret;
> > > +
> > > +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> > > +	if (!priv)
> > > +		return -ENOMEM;
> > > +
> > > +	priv->clk = devm_clk_get(dev, NULL);
> > > +	if (IS_ERR(priv->clk)) {
> > > +		dev_err(dev, "failed to get postmask clk\n");
> > > +		return PTR_ERR(priv->clk);
> > > +	}
> > > +
> > > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > +	priv->regs = devm_ioremap_resource(dev, res);
> > > +	if (IS_ERR(priv->regs)) {
> > > +		dev_err(dev, "failed to ioremap postmask\n");
> > > +		return PTR_ERR(priv->regs);
> > > +	}
> > > +
> > > +#if IS_REACHABLE(CONFIG_MTK_CMDQ)
> > > +	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
> > > +	if (ret)
> > > +		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
> > > +#endif
> > > +
> > > +	priv->data = of_device_get_match_data(dev);
> > > +	platform_set_drvdata(pdev, priv);
> > > +
> > > +	pm_runtime_enable(dev);
> > 
> > Why this?
> 
> if add power domain information in dts, we need this to make sure
> display power domain will be off after module clock off.

Please align all sub driver. All do or all not do.

> 
> > 
> > > +
> > > +	ret = component_add(dev, &mtk_disp_postmask_component_ops);
> > > +	if (ret)
> > > +		dev_err(dev, "Failed to add component: %d\n", ret);
> > > +
> > > +	return ret;
> > > +}
> > > +
> > > +static int mtk_disp_postmask_remove(struct platform_device *pdev)
> > > +{
> > > +	component_del(&pdev->dev, &mtk_disp_postmask_component_ops);
> > > +
> > > +	pm_runtime_disable(&pdev->dev);
> > > +
> > > +	return 0;
> > > +}
> > > +
> > > +static const struct of_device_id mtk_disp_postmask_driver_dt_match[] = {
> > > +	{},
> > > +};
> > > +MODULE_DEVICE_TABLE(of, mtk_disp_postmask_driver_dt_match);
> > > +
> > > +struct platform_driver mtk_disp_postmask_driver = {
> > > +	.probe		= mtk_disp_postmask_probe,
> > > +	.remove		= mtk_disp_postmask_remove,
> > > +	.driver		= {
> > > +		.name	= "mediatek-disp-postmask",
> > > +		.owner	= THIS_MODULE,
> > > +		.of_match_table = mtk_disp_postmask_driver_dt_match,
> > > +	},
> > > +};
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > > index ccfaada998cf5..6c539783118dd 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > > @@ -415,6 +415,14 @@ static const struct mtk_ddp_comp_funcs ddp_ovl = {
> > >  	.bgclr_in_off = mtk_ovl_bgclr_in_off,
> > >  };
> > >  
> > > +static const struct mtk_ddp_comp_funcs ddp_postmask = {
> > > +	.clk_enable = mtk_postmask_clk_enable,
> > > +        .clk_disable = mtk_postmask_clk_disable,
> > 
> > tab.
> > 
> > > +	.config = mtk_postmask_config,
> > > +	.start = mtk_postmask_start,
> > > +	.stop = mtk_postmask_stop,
> > > +};
> > > +
> > >  static const struct mtk_ddp_comp_funcs ddp_rdma = {
> > >  	.clk_enable = mtk_rdma_clk_enable,
> > >  	.clk_disable = mtk_rdma_clk_disable,
> > > @@ -450,6 +458,7 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
> > >  	[MTK_DISP_MUTEX] = "mutex",
> > >  	[MTK_DISP_OD] = "od",
> > >  	[MTK_DISP_BLS] = "bls",
> > > +	[MTK_DISP_POSTMASK] = "postmask",
> > >  };
> > >  
> > >  struct mtk_ddp_comp_match {
> > > @@ -480,6 +489,7 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
> > >  	[DDP_COMPONENT_OVL_2L0]	= { MTK_DISP_OVL_2L,	0, &ddp_ovl },
> > >  	[DDP_COMPONENT_OVL_2L1]	= { MTK_DISP_OVL_2L,	1, &ddp_ovl },
> > >  	[DDP_COMPONENT_OVL_2L2] = { MTK_DISP_OVL_2L,    2, &ddp_ovl },
> > > +	[DDP_COMPONENT_POSTMASK0]	= { MTK_DISP_POSTMASK,	0, &ddp_postmask },
> > 
> > Make other row the same indent.
> > 
> > >  	[DDP_COMPONENT_PWM0]	= { MTK_DISP_PWM,	0, NULL },
> > >  	[DDP_COMPONENT_PWM1]	= { MTK_DISP_PWM,	1, NULL },
> > >  	[DDP_COMPONENT_PWM2]	= { MTK_DISP_PWM,	2, NULL },
> > > @@ -603,6 +613,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
> > >  	if (type == MTK_DISP_BLS ||
> > >  	    type == MTK_DISP_COLOR ||
> > >  	    type == MTK_DISP_GAMMA ||
> > > +	    type == MTK_DISP_POSTMASK ||
> > >  	    type == MTK_DPI ||
> > >  	    type == MTK_DSI ||
> > >  	    type == MTK_DISP_OVL ||
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > > index bb914d976cf5d..cd1dec6b4cdf2 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > > @@ -30,6 +30,7 @@ enum mtk_ddp_comp_type {
> > >  	MTK_DISP_UFOE,
> > >  	MTK_DSI,
> > >  	MTK_DPI,
> > > +	MTK_DISP_POSTMASK,
> > >  	MTK_DISP_PWM,
> > >  	MTK_DISP_MUTEX,
> > >  	MTK_DISP_OD,
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > > index 486e73e675ad5..d99afc8528684 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > > @@ -531,7 +531,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
> > >  		private->comp_node[comp_id] = of_node_get(node);
> > >  
> > >  		/*
> > > -		 * Currently only the COLOR, GAMMA, OVL, RDMA, DSI, and DPI blocks have
> > > +		 * Currently only the COLOR, GAMMA, OVL, POSTMASK, RDMA, DSI, and DPI blocks have
> > >  		 * separate component platform drivers and initialize their own
> > >  		 * DDP component structure. The others are initialized here.
> > >  		 */
> > > @@ -539,6 +539,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
> > >  		    comp_type == MTK_DISP_GAMMA ||
> > >  		    comp_type == MTK_DISP_OVL ||
> > >  		    comp_type == MTK_DISP_OVL_2L ||
> > > +		    comp_type == MTK_DISP_POSTMASK ||
> > >  		    comp_type == MTK_DISP_RDMA ||
> > >  		    comp_type == MTK_DSI ||
> > >  		    comp_type == MTK_DPI) {
> > > @@ -637,6 +638,7 @@ static struct platform_driver * const mtk_drm_drivers[] = {
> > >  	&mtk_disp_color_driver,
> > >  	&mtk_disp_gamma_driver,
> > >  	&mtk_disp_ovl_driver,
> > > +	&mtk_disp_postmask_driver,
> > >  	&mtk_disp_rdma_driver,
> > >  	&mtk_dpi_driver,
> > >  	&mtk_drm_platform_driver,
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > > index 0e54e3d51014a..7e7b28e32aa2f 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > > @@ -49,6 +49,7 @@ struct mtk_drm_private {
> > >  extern struct platform_driver mtk_disp_color_driver;
> > >  extern struct platform_driver mtk_disp_gamma_driver;
> > >  extern struct platform_driver mtk_disp_ovl_driver;
> > > +extern struct platform_driver mtk_disp_postmask_driver;
> > >  extern struct platform_driver mtk_disp_rdma_driver;
> > >  extern struct platform_driver mtk_dpi_driver;
> > >  extern struct platform_driver mtk_dsi_driver;
> > 
> > 
> 
> 

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