[PATCH 13/14] drm/msm: Add hdcp register ranges to sc7180 device tree

[Stephen Boyd]

Quoting Sean Paul (2021-09-13 10:57:44)
> From: Sean Paul <seanpaul at chromium.org>
>
> This patch adds the register ranges required for HDCP to the sc7180
> device tree. These registers will be used to inject HDCP key as well as
> toggle HDCP on and off.

It doesn't look to do any of that?

>
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> ---
>  drivers/gpu/drm/msm/dp/dp_parser.c | 30 +++++++++++++++++++++++++++---
>  drivers/gpu/drm/msm/dp/dp_parser.h |  4 ++++
>  2 files changed, 31 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
> index 0519dd3ac3c3..4bbe2485ce3c 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -20,11 +20,19 @@ 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)
> +                               struct dss_io_data *io_data, const char *name,
> +                               int fallback_idx)
>  {
>         struct resource *res = NULL;
>
> -       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
> +
> +       /* Support dts which do not have named resources */

Please no. Just use index and know that 0 is the dp hardware, 1 is the
hdcp key and 2 is the tz interaction zone. There is some backwards
compat logic to maintain for when it was split out but I hope we can
drop that soon. Alternatively we could make a new compatible and then
not care about future conflicts.

> +       if (!res) {
> +               if (fallback_idx >= 0)
> +                       res = platform_get_resource(pdev, IORESOURCE_MEM,
> +                                                   fallback_idx);
> +       }
>         if (!res) {
>                 DRM_ERROR("%pS->%s: msm_dss_get_res failed\n",
>                         __builtin_return_address(0), __func__);
> @@ -55,6 +63,8 @@ static void dp_parser_unmap_io_resources(struct dp_parser *parser)
>  {
>         struct dp_io *io = &parser->io;
>
> +       msm_dss_iounmap(&io->hdcp_tz);
> +       msm_dss_iounmap(&io->hdcp_key);
>         msm_dss_iounmap(&io->dp_controller);
>  }
>
> @@ -64,12 +74,26 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
>         struct platform_device *pdev = parser->pdev;
>         struct dp_io *io = &parser->io;
>
> -       rc = msm_dss_ioremap(pdev, &io->dp_controller);
> +       rc = msm_dss_ioremap(pdev, &io->dp_controller, "dp_controller", 0);
>         if (rc) {
>                 DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc);
>                 goto err;
>         }
>
> +       rc = msm_dss_ioremap(pdev, &io->hdcp_key, "hdcp_key", -1);
> +       if (rc) {
> +               DRM_INFO("unable to remap dp hdcp resources, rc=%d\n", rc);
> +               io->hdcp_key.base = NULL;
> +               io->hdcp_key.len = 0;
> +       }
> +
> +       rc = msm_dss_ioremap(pdev, &io->hdcp_tz, "hdcp_tz", -1);
> +       if (rc) {
> +               DRM_INFO("unable to remap dp hdcp resources, rc=%d\n", rc);

These shouldn't be info messages. Also, the ioremap wrapper already
prints the message that it failed so these are redundant.

> +               io->hdcp_tz.base = NULL;
> +               io->hdcp_tz.len = 0;
> +       }
> +
>         io->phy = devm_phy_get(&pdev->dev, "dp");
>         if (IS_ERR(io->phy)) {
>                 rc = PTR_ERR(io->phy);