| Message ID | 20210825222557.1499104-4-bjorn.andersson@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | drm/msm/dp: Allow variation in register regions | expand |
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; > }; >
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__); - 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; void __iomem *base; };
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. While at it, devm_ioremap_resource() already prints useful error messages on failure, so omit the unnecessary prints from the caller. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- Changes since v1: - Dropped initialization of "res" - Fixed devm_ioremap() return value check - Dropped error prints (as devm_ioremap() already does that) drivers/gpu/drm/msm/dp/dp_parser.c | 30 ++++++++++-------------------- drivers/gpu/drm/msm/dp/dp_parser.h | 2 +- 2 files changed, 11 insertions(+), 21 deletions(-) -- 2.29.2