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Date: Thu, 27 Feb 2020 09:45:01 +0100
From: Enric Balletbo i Serra <enric.balletbo@...labora.com>
To: CK Hu <ck.hu@...iatek.com>
Cc: robh+dt@...nel.org, mark.rutland@....com, p.zabel@...gutronix.de,
airlied@...ux.ie, mturquette@...libre.com, sboyd@...nel.org,
ulrich.hecht+renesas@...il.com, laurent.pinchart@...asonboard.com,
Kate Stewart <kstewart@...uxfoundation.org>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
dri-devel@...ts.freedesktop.org,
Richard Fontana <rfontana@...hat.com>,
Collabora Kernel ML <kernel@...labora.com>,
linux-clk@...r.kernel.org, Weiyi Lu <weiyi.lu@...iatek.com>,
wens@...e.org, linux-arm-kernel@...ts.infradead.org,
mtk01761 <wendell.lin@...iatek.com>, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, frank-w@...lic-files.de,
Seiya Wang <seiya.wang@...iatek.com>, sean.wang@...iatek.com,
Houlong Wei <houlong.wei@...iatek.com>,
linux-mediatek@...ts.infradead.org, hsinyi@...omium.org,
Matthias Brugger <matthias.bgg@...il.com>,
Thomas Gleixner <tglx@...utronix.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Allison Randal <allison@...utok.net>,
Matthias Brugger <mbrugger@...e.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
rdunlap@...radead.org, linux-kernel@...r.kernel.org,
Daniel Vetter <daniel@...ll.ch>, matthias.bgg@...nel.org
Subject: Re: [PATCH v9 1/4] drm/mediatek: Use regmap for register access
Hi CK,
On 27/2/20 2:10, CK Hu wrote:
> Hi, Enric:
>
> On Wed, 2020-02-26 at 11:54 +0100, Enric Balletbo i Serra wrote:
>> From: Matthias Brugger <mbrugger@...e.com>
>>
>> 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.
>
Do you want me do this in this series or later?
Thanks,
Enric
> Regards,
> CK
>
>>
>> Signed-off-by: Matthias Brugger <mbrugger@...e.com>
>> Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
>> Reviewed-by: CK Hu <ck.hu@...iatek.com>
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>> ---
>>
>> 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 <linux/component.h>
>> #include <linux/iommu.h>
>> +#include <linux/mfd/syscon.h>
>> #include <linux/module.h>
>> #include <linux/of_address.h>
>> #include <linux/of_platform.h>
>> @@ -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;
>
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