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@xxxxxxxxxx>
> ---
> 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");
