diff mbox series

[3/5] drm/msm/dp: Refactor ioremap wrapper

Message ID 20210722024227.3313096-4-bjorn.andersson@linaro.org
State New
Headers show
Series drm/msm/dp: Allow variation in register regions | expand

Commit Message

Bjorn Andersson July 22, 2021, 2:42 a.m. UTC
In order to deal with multiple memory ranges in the following commit
change the ioremap wrapper to not poke directly into the dss_io_data
struct.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_parser.c | 28 ++++++++++++++--------------
 drivers/gpu/drm/msm/dp/dp_parser.h |  2 +-
 2 files changed, 15 insertions(+), 15 deletions(-)

Comments

Stephen Boyd July 22, 2021, 8:09 p.m. UTC | #1
Quoting Bjorn Andersson (2021-07-21 19:42:25)
> In order to deal with multiple memory ranges in the following commit
> change the ioremap wrapper to not poke directly into the dss_io_data
> struct.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
>  drivers/gpu/drm/msm/dp/dp_parser.c | 28 ++++++++++++++--------------
>  drivers/gpu/drm/msm/dp/dp_parser.h |  2 +-
>  2 files changed, 15 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
> index c064ced78278..e68dacef547c 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -19,39 +19,39 @@ static const struct dp_regulator_cfg sdm845_dp_reg_cfg = {
>         },
>  };
>
> -static int msm_dss_ioremap(struct platform_device *pdev,
> -                               struct dss_io_data *io_data)
> +static void __iomem *dp_ioremap(struct platform_device *pdev, int idx, size_t *len)
>  {
>         struct resource *res = NULL;

Can we drop assignment to NULL too?

> +       void __iomem *base;
>
> -       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, idx);
>         if (!res) {
>                 DRM_ERROR("%pS->%s: msm_dss_get_res failed\n",
>                         __builtin_return_address(0), __func__);
> -               return -ENODEV;
> +               return ERR_PTR(-ENODEV);
>         }
>
> -       io_data->len = (u32)resource_size(res);
> -       io_data->base = devm_ioremap(&pdev->dev, res->start, io_data->len);
> -       if (!io_data->base) {
> +       base = devm_ioremap_resource(&pdev->dev, res);
> +       if (!base) {

devm_ioremap_resource() returns an ERR_PTR on failure, not NULL.

>                 DRM_ERROR("%pS->%s: ioremap failed\n",
>                         __builtin_return_address(0), __func__);
> -               return -EIO;
> +               return ERR_PTR(-EIO);
>         }
>
> -       return 0;
> +       *len = resource_size(res);
> +       return base;
>  }
>
>  static int dp_parser_ctrl_res(struct dp_parser *parser)
>  {
> -       int rc = 0;
>         struct platform_device *pdev = parser->pdev;
>         struct dp_io *io = &parser->io;
> +       struct dss_io_data *dss = &io->dp_controller;
>
> -       rc = msm_dss_ioremap(pdev, &io->dp_controller);
> -       if (rc) {
> -               DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc);
> -               return rc;
> +       dss->base = dp_ioremap(pdev, 0, &dss->len);
> +       if (IS_ERR(dss->base)) {
> +               DRM_ERROR("unable to remap dp io region: %pe\n", dss->base);
> +               return PTR_ERR(dss->base);
>         }
>
>         io->phy = devm_phy_get(&pdev->dev, "dp");
Abhinav Kumar July 23, 2021, 8:16 p.m. UTC | #2
On 2021-07-21 19:42, Bjorn Andersson wrote:
> In order to deal with multiple memory ranges in the following commit
> change the ioremap wrapper to not poke directly into the dss_io_data
> struct.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
I think we can squash this one and the next patch into one.
Because the APIs and structs you are modifying here are again getting 
touched in the next one too.
> ---
>  drivers/gpu/drm/msm/dp/dp_parser.c | 28 ++++++++++++++--------------
>  drivers/gpu/drm/msm/dp/dp_parser.h |  2 +-
>  2 files changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c
> b/drivers/gpu/drm/msm/dp/dp_parser.c
> index c064ced78278..e68dacef547c 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -19,39 +19,39 @@ static const struct dp_regulator_cfg 
> sdm845_dp_reg_cfg = {
>  	},
>  };
> 
> -static int msm_dss_ioremap(struct platform_device *pdev,
> -				struct dss_io_data *io_data)
> +static void __iomem *dp_ioremap(struct platform_device *pdev, int
> idx, size_t *len)
>  {
>  	struct resource *res = NULL;
> +	void __iomem *base;
> 
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, idx);
>  	if (!res) {
>  		DRM_ERROR("%pS->%s: msm_dss_get_res failed\n",
>  			__builtin_return_address(0), __func__);
> -		return -ENODEV;
> +		return ERR_PTR(-ENODEV);
>  	}
> 
> -	io_data->len = (u32)resource_size(res);
> -	io_data->base = devm_ioremap(&pdev->dev, res->start, io_data->len);
> -	if (!io_data->base) {
> +	base = devm_ioremap_resource(&pdev->dev, res);
> +	if (!base) {
>  		DRM_ERROR("%pS->%s: ioremap failed\n",
>  			__builtin_return_address(0), __func__);
> -		return -EIO;
> +		return ERR_PTR(-EIO);
>  	}
> 
> -	return 0;
> +	*len = resource_size(res);
> +	return base;
>  }
> 
>  static int dp_parser_ctrl_res(struct dp_parser *parser)
>  {
> -	int rc = 0;
>  	struct platform_device *pdev = parser->pdev;
>  	struct dp_io *io = &parser->io;
> +	struct dss_io_data *dss = &io->dp_controller;
> 
> -	rc = msm_dss_ioremap(pdev, &io->dp_controller);
> -	if (rc) {
> -		DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc);
> -		return rc;
> +	dss->base = dp_ioremap(pdev, 0, &dss->len);
> +	if (IS_ERR(dss->base)) {
> +		DRM_ERROR("unable to remap dp io region: %pe\n", dss->base);
> +		return PTR_ERR(dss->base);
>  	}
> 
>  	io->phy = devm_phy_get(&pdev->dev, "dp");
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h
> b/drivers/gpu/drm/msm/dp/dp_parser.h
> index 34b49628bbaf..dc62e70b1640 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.h
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.h
> @@ -26,7 +26,7 @@ enum dp_pm_type {
>  };
> 
>  struct dss_io_data {
> -	u32 len;
> +	size_t len;
>  	void __iomem *base;
>  };
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index c064ced78278..e68dacef547c 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -19,39 +19,39 @@  static const struct dp_regulator_cfg sdm845_dp_reg_cfg = {
 	},
 };
 
-static int msm_dss_ioremap(struct platform_device *pdev,
-				struct dss_io_data *io_data)
+static void __iomem *dp_ioremap(struct platform_device *pdev, int idx, size_t *len)
 {
 	struct resource *res = NULL;
+	void __iomem *base;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, idx);
 	if (!res) {
 		DRM_ERROR("%pS->%s: msm_dss_get_res failed\n",
 			__builtin_return_address(0), __func__);
-		return -ENODEV;
+		return ERR_PTR(-ENODEV);
 	}
 
-	io_data->len = (u32)resource_size(res);
-	io_data->base = devm_ioremap(&pdev->dev, res->start, io_data->len);
-	if (!io_data->base) {
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (!base) {
 		DRM_ERROR("%pS->%s: ioremap failed\n",
 			__builtin_return_address(0), __func__);
-		return -EIO;
+		return ERR_PTR(-EIO);
 	}
 
-	return 0;
+	*len = resource_size(res);
+	return base;
 }
 
 static int dp_parser_ctrl_res(struct dp_parser *parser)
 {
-	int rc = 0;
 	struct platform_device *pdev = parser->pdev;
 	struct dp_io *io = &parser->io;
+	struct dss_io_data *dss = &io->dp_controller;
 
-	rc = msm_dss_ioremap(pdev, &io->dp_controller);
-	if (rc) {
-		DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc);
-		return rc;
+	dss->base = dp_ioremap(pdev, 0, &dss->len);
+	if (IS_ERR(dss->base)) {
+		DRM_ERROR("unable to remap dp io region: %pe\n", dss->base);
+		return PTR_ERR(dss->base);
 	}
 
 	io->phy = devm_phy_get(&pdev->dev, "dp");
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 34b49628bbaf..dc62e70b1640 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -26,7 +26,7 @@  enum dp_pm_type {
 };
 
 struct dss_io_data {
-	u32 len;
+	size_t len;
 	void __iomem *base;
 };