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From: CK Hu <ck.hu@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>
Cc: mark.rutland@arm.com, airlied@linux.ie, mturquette@baylibre.com,
	dri-devel@lists.freedesktop.org,
	laurent.pinchart@ideasonboard.com,
	ulrich.hecht+renesas@gmail.com, lee.jones@linaro.org,
	linux-clk@vger.kernel.org, linux@armlinux.org.uk,
	sean.wang@mediatek.com, robh+dt@kernel.org,
	linux-mediatek@lists.infradead.org, mchehab@kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Matthias Brugger <mbrugger@suse.com>,
	gregkh@linuxfoundation.org, rdunlap@infradead.org,
	sboyd@codeaurora.org, linux-kernel@vger.kernel.org,
	pi-cheng.chen@linaro.org, davem@davemloft.net
Subject: Re: [PATCH 1/8] drm/mediatek: Use regmap for register access
Date: Thu, 23 Nov 2017 13:44:09 +0800	[thread overview]
Message-ID: <1511415849.20405.1.camel@mtksdaap41> (raw)
In-Reply-To: <20171114214114.15793-2-mbrugger@suse.com>

Hi, Matthias:

On Tue, 2017-11-14 at 22:41 +0100, Matthias Brugger wrote:
> The mmsys memory space is shared between the drm and the
> clk driver. Use regmap to access it.
> 
> Signed-off-by: Matthias Brugger <mbrugger@suse.com>

Acked-by: CK Hu <ck.hu@mediatek.com>

> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c |  4 ++--
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.c  | 30 +++++++++++++++++-------------
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.h  |  4 ++--
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c  | 13 ++++---------
>  drivers/gpu/drm/mediatek/mtk_drm_drv.h  |  2 +-
>  5 files changed, 26 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 658b8dd45b83..4c65873b4867 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -33,7 +33,7 @@
>   * @enabled: records whether crtc_enable succeeded
>   * @planes: array of 4 drm_plane structures, one for each overlay plane
>   * @pending_planes: whether any plane has pending changes to be applied
> - * @config_regs: memory mapped mmsys configuration register space
> + * @config_regs: regmap mapped mmsys configuration register space
>   * @mutex: handle to one of the ten disp_mutex streams
>   * @ddp_comp_nr: number of components in ddp_comp
>   * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
> @@ -48,7 +48,7 @@ struct mtk_drm_crtc {
>  	struct drm_plane		planes[OVL_LAYER_NR];
>  	bool				pending_planes;
>  
> -	void __iomem			*config_regs;
> +	struct regmap			*config_regs;
>  	struct mtk_disp_mutex		*mutex;
>  	unsigned int			ddp_comp_nr;
>  	struct mtk_ddp_comp		**ddp_comp;
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> index 8130f3dab661..1227d6db07da 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> @@ -185,16 +185,16 @@ static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
>  	return value;
>  }
>  
> -static void mtk_ddp_sout_sel(void __iomem *config_regs,
> +static void mtk_ddp_sout_sel(struct regmap *config_regs,
>  			     enum mtk_ddp_comp_id cur,
>  			     enum mtk_ddp_comp_id next)
>  {
>  	if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0)
> -		writel_relaxed(BLS_TO_DSI_RDMA1_TO_DPI1,
> -			       config_regs + DISP_REG_CONFIG_OUT_SEL);
> +		regmap_write(config_regs, DISP_REG_CONFIG_OUT_SEL,
> +				BLS_TO_DSI_RDMA1_TO_DPI1);
>  }
>  
> -void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
> +void mtk_ddp_add_comp_to_path(struct regmap *config_regs,
>  			      enum mtk_ddp_comp_id cur,
>  			      enum mtk_ddp_comp_id next)
>  {
> @@ -202,20 +202,22 @@ void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
>  
>  	value = mtk_ddp_mout_en(cur, next, &addr);
>  	if (value) {
> -		reg = readl_relaxed(config_regs + addr) | value;
> -		writel_relaxed(reg, config_regs + addr);
> +		regmap_read(config_regs, addr, &reg);
> +		reg |= value;
> +		regmap_write(config_regs, addr, reg);
>  	}
>  
>  	mtk_ddp_sout_sel(config_regs, cur, next);
>  
>  	value = mtk_ddp_sel_in(cur, next, &addr);
>  	if (value) {
> -		reg = readl_relaxed(config_regs + addr) | value;
> -		writel_relaxed(reg, config_regs + addr);
> +		regmap_read(config_regs, addr, &reg);
> +		reg |= value;
> +		regmap_write(config_regs, addr, reg);
>  	}
>  }
>  
> -void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
> +void mtk_ddp_remove_comp_from_path(struct regmap *config_regs,
>  				   enum mtk_ddp_comp_id cur,
>  				   enum mtk_ddp_comp_id next)
>  {
> @@ -223,14 +225,16 @@ void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
>  
>  	value = mtk_ddp_mout_en(cur, next, &addr);
>  	if (value) {
> -		reg = readl_relaxed(config_regs + addr) & ~value;
> -		writel_relaxed(reg, config_regs + addr);
> +		regmap_read(config_regs, addr, &reg);
> +		reg &= ~value;
> +		regmap_write(config_regs, addr, reg);
>  	}
>  
>  	value = mtk_ddp_sel_in(cur, next, &addr);
>  	if (value) {
> -		reg = readl_relaxed(config_regs + addr) & ~value;
> -		writel_relaxed(reg, config_regs + addr);
> +		regmap_read(config_regs, addr, &reg);
> +		reg &= ~value;
> +		regmap_write(config_regs, addr, reg);
>  	}
>  }
>  
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp.h
> index f9a799168077..32e12f33b76a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.h
> @@ -20,10 +20,10 @@ struct regmap;
>  struct device;
>  struct mtk_disp_mutex;
>  
> -void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
> +void mtk_ddp_add_comp_to_path(struct regmap *config_regs,
>  			      enum mtk_ddp_comp_id cur,
>  			      enum mtk_ddp_comp_id next);
> -void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
> +void mtk_ddp_remove_comp_from_path(struct regmap *config_regs,
>  				   enum mtk_ddp_comp_id cur,
>  				   enum mtk_ddp_comp_id next);
>  
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index b2ad19bd1e00..dd249cf5121e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -21,6 +21,7 @@
>  #include <drm/drm_of.h>
>  #include <linux/component.h>
>  #include <linux/iommu.h>
> +#include <linux/mfd/syscon.h>
>  #include <linux/of_address.h>
>  #include <linux/of_platform.h>
>  #include <linux/pm_runtime.h>
> @@ -393,7 +394,6 @@ static int mtk_drm_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct mtk_drm_private *private;
> -	struct resource *mem;
>  	struct device_node *node;
>  	struct component_match *match = NULL;
>  	int ret;
> @@ -407,14 +407,9 @@ static int mtk_drm_probe(struct platform_device *pdev)
>  	INIT_WORK(&private->commit.work, mtk_atomic_work);
>  	private->data = of_device_get_match_data(dev);
>  
> -	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	private->config_regs = devm_ioremap_resource(dev, mem);
> -	if (IS_ERR(private->config_regs)) {
> -		ret = PTR_ERR(private->config_regs);
> -		dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n",
> -			ret);
> -		return ret;
> -	}
> +	private->config_regs = syscon_node_to_regmap(dev->of_node);
> +	if (IS_ERR(private->config_regs))
> +		return PTR_ERR(private->config_regs);
>  
>  	/* Iterate over sibling DISP function blocks */
>  	for_each_child_of_node(dev->of_node->parent, node) {
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index 4edc0023684c..86cec19193c4 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -44,7 +44,7 @@ struct mtk_drm_private {
>  
>  	struct device_node *mutex_node;
>  	struct device *mutex_dev;
> -	void __iomem *config_regs;
> +	struct regmap *config_regs;
>  	struct device_node *comp_node[DDP_COMPONENT_ID_MAX];
>  	struct mtk_ddp_comp *ddp_comp[DDP_COMPONENT_ID_MAX];
>  	const struct mtk_mmsys_driver_data *data;


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  reply	other threads:[~2017-11-23  5:44 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-14 21:41 [PATCH 0/8] arm/arm64: mediatek: Fix mmsys device probing Matthias Brugger
2017-11-14 21:41 ` [PATCH 1/8] drm/mediatek: Use regmap for register access Matthias Brugger
2017-11-23  5:44   ` CK Hu [this message]
2017-11-23  8:54   ` Philipp Zabel
2018-04-20  9:41     ` Matthias Brugger
2018-04-20 10:00       ` Philipp Zabel
2017-11-14 21:41 ` [PATCH 2/8] mfd: mtk-mmsys: Add mmsys driver Matthias Brugger
2017-11-23  9:04   ` CK Hu
2017-11-23 18:37     ` Matthias Brugger
2017-11-23  9:09   ` Philipp Zabel
2017-11-14 21:41 ` [PATCH 3/8] drm/mediatek: mt2701: switch to mfd probing Matthias Brugger
2017-11-23  5:48   ` CK Hu
2017-11-23  8:30     ` Matthias Brugger
2017-11-23  8:47       ` CK Hu
2017-11-23  9:12   ` Philipp Zabel
2017-11-14 21:41 ` [PATCH 4/8] clk: mediatek: mt2701-mm: switch to mfd device Matthias Brugger
2017-11-15  0:17   ` Stephen Boyd
2018-04-20 13:00     ` Matthias Brugger
2018-04-20 13:04       ` Matthias Brugger
2017-11-14 21:41 ` [PATCH 5/8] mfd: mtk-mmsys: Add mt8173 nodes Matthias Brugger
2017-11-23  9:13   ` Philipp Zabel
2017-11-14 21:41 ` [PATCH 6/8] drm/mediatek: Add mfd support for mt8173 Matthias Brugger
2017-11-23  8:51   ` CK Hu
2017-11-23  9:13   ` Philipp Zabel
2017-11-14 21:41 ` [PATCH 7/8] clk: mediatek: mt8173-mm: switch to mfd device Matthias Brugger
2017-11-15  0:16   ` Stephen Boyd
2017-11-14 21:41 ` [PATCH 8/8] MAINTAINERS: update Mediatek Soc entry Matthias Brugger

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