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Wed, 26 Feb 2020 17:11:02 -0800 Received: from mtkmbs08n2.mediatek.inc (172.21.101.56) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 26 Feb 2020 17:11:00 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 27 Feb 2020 09:10:04 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 27 Feb 2020 09:10:48 +0800 Message-ID: <1582765858.20746.2.camel@mtksdaap41> Subject: Re: [PATCH v9 1/4] drm/mediatek: Use regmap for register access From: CK Hu To: Enric Balletbo i Serra Date: Thu, 27 Feb 2020 09:10:58 +0800 In-Reply-To: <20200226105419.632771-2-enric.balletbo@collabora.com> References: <20200226105419.632771-1-enric.balletbo@collabora.com> <20200226105419.632771-2-enric.balletbo@collabora.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: D30F497065135211C6216342C86114129F1F30BEA135DFA590346BD2746D5C1F2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200226_171107_064227_BDC9DBBD X-CRM114-Status: GOOD ( 22.71 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, Kate Stewart , Minghsiu Tsai , Andrew-CT Chen , airlied@linux.ie, mturquette@baylibre.com, dri-devel@lists.freedesktop.org, Richard Fontana , laurent.pinchart@ideasonboard.com, ulrich.hecht+renesas@gmail.com, Collabora Kernel ML , linux-clk@vger.kernel.org, Weiyi Lu , wens@csie.org, Allison Randal , mtk01761 , linux-media@vger.kernel.org, devicetree@vger.kernel.org, Daniel Vetter , frank-w@public-files.de, Seiya Wang , sean.wang@mediatek.com, Houlong Wei , robh+dt@kernel.org, linux-mediatek@lists.infradead.org, hsinyi@chromium.org, Matthias Brugger , Thomas Gleixner , Mauro Carvalho Chehab , linux-arm-kernel@lists.infradead.org, Matthias Brugger , sboyd@kernel.org, Greg Kroah-Hartman , rdunlap@infradead.org, linux-kernel@vger.kernel.org, p.zabel@pengutronix.de, matthias.bgg@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hi, Enric: On Wed, 2020-02-26 at 11:54 +0100, Enric Balletbo i Serra wrote: > From: Matthias Brugger > > The mmsys memory space is shared between the drm and the > clk driver. Use regmap to access it. Once there is a mmsys driver and clock control is moved into mmsys driver, I think we should also move routing control into mmsys driver and we could drop this patch. Regards, CK > > Signed-off-by: Matthias Brugger > Reviewed-by: Philipp Zabel > Reviewed-by: CK Hu > Signed-off-by: Enric Balletbo i Serra > --- > > Changes in v9: None > Changes in v8: > - Select REGMAP and MFD_SYSCON (Randy Dunlap) > > Changes in v7: > - Add R-by from CK > > drivers/gpu/drm/mediatek/Kconfig | 2 + > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 4 +- > drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 50 +++++++++++-------------- > 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 +- > 6 files changed, 32 insertions(+), 43 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kconfig > index fa5ffc4fe823..89e18a473cb5 100644 > --- a/drivers/gpu/drm/mediatek/Kconfig > +++ b/drivers/gpu/drm/mediatek/Kconfig > @@ -10,8 +10,10 @@ config DRM_MEDIATEK > select DRM_KMS_HELPER > select DRM_MIPI_DSI > select DRM_PANEL > + select MFD_SYSCON > select MEMORY > select MTK_SMI > + select REGMAP > select VIDEOMODE_HELPERS > help > Choose this option if you have a Mediatek SoCs. > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > index 5ee74d7ce35c..a236499123aa 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > @@ -28,7 +28,7 @@ > * @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 > @@ -50,7 +50,7 @@ struct mtk_drm_crtc { > u32 cmdq_event; > #endif > > - 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 13035c906035..302753744cc6 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c > @@ -383,61 +383,53 @@ 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); > } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DPI0) { > - writel_relaxed(BLS_TO_DPI_RDMA1_TO_DSI, > - config_regs + DISP_REG_CONFIG_OUT_SEL); > - writel_relaxed(DSI_SEL_IN_RDMA, > - config_regs + DISP_REG_CONFIG_DSI_SEL); > - writel_relaxed(DPI_SEL_IN_BLS, > - config_regs + DISP_REG_CONFIG_DPI_SEL); > + regmap_write(config_regs, DISP_REG_CONFIG_OUT_SEL, > + BLS_TO_DPI_RDMA1_TO_DSI); > + regmap_write(config_regs, DISP_REG_CONFIG_DSI_SEL, > + DSI_SEL_IN_RDMA); > + regmap_write(config_regs, DISP_REG_CONFIG_DPI_SEL, > + DPI_SEL_IN_BLS); > } > } > > -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) > { > - unsigned int addr, value, reg; > + unsigned int addr, value; > > value = mtk_ddp_mout_en(cur, next, &addr); > - if (value) { > - reg = readl_relaxed(config_regs + addr) | value; > - writel_relaxed(reg, config_regs + addr); > - } > + if (value) > + regmap_update_bits(config_regs, addr, value, value); > > 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); > - } > + if (value) > + regmap_update_bits(config_regs, addr, value, value); > } > > -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) > { > - unsigned int addr, value, reg; > + unsigned int addr, value; > > value = mtk_ddp_mout_en(cur, next, &addr); > - if (value) { > - reg = readl_relaxed(config_regs + addr) & ~value; > - writel_relaxed(reg, config_regs + addr); > - } > + if (value) > + regmap_update_bits(config_regs, addr, value, 0); > > value = mtk_ddp_sel_in(cur, next, &addr); > - if (value) { > - reg = readl_relaxed(config_regs + addr) & ~value; > - writel_relaxed(reg, config_regs + addr); > - } > + if (value) > + regmap_update_bits(config_regs, addr, value, 0); > } > > struct mtk_disp_mutex *mtk_disp_mutex_get(struct device *dev, unsigned int id) > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp.h > index 827be424a148..01ff8b68881f 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.h > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.h > @@ -12,10 +12,10 @@ 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 0563c6813333..b68837ea02b3 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c > @@ -6,6 +6,7 @@ > > #include > #include > +#include > #include > #include > #include > @@ -425,7 +426,6 @@ 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; > @@ -437,14 +437,9 @@ static int mtk_drm_probe(struct platform_device *pdev) > > 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 17bc99b9f5d4..03201080688d 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h > @@ -39,7 +39,7 @@ 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; _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek