Quoting Bjorn Andersson (2021-08-25 15:25:55)
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
> index c064ced78278..215065336268 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -19,40 +19,30 @@ 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;
> + struct resource *res;
>
> - 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__);
This error can be removed too, right? At least I thought passing in NULL
as 'res' to devm_ioremap_resource() did that. It actually looks like we
can use devm_platform_get_and_ioremap_resource() and then pass in &res
base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (!IS_ERR(base))
*len = resource_size(res);
return base;
> - 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) {
> - DRM_ERROR("%pS->%s: ioremap failed\n",
> - __builtin_return_address(0), __func__);
> - return -EIO;
> - }
> -
> - return 0;
> + *len = resource_size(res);
> + return devm_ioremap_resource(&pdev->dev, res);
> }
>
> 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))
> + return PTR_ERR(dss->base);
>
> io->phy = devm_phy_get(&pdev->dev, "dp");
> if (IS_ERR(io->phy))
> 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;
len is a resource_size_t above, not sure if that really matters in
practice to indicate it here though.
> void __iomem *base;
> };
>
