Re: [PATCH v3 05/10] drm/rockchip: analogix_dp: add rk3399 eDP support

[Sean Paul <seanpaul@chromium.org>]

On Tue, Jun 14, 2016 at 7:46 AM, Yakir Yang <ykk@rock-chips.com> wrote:
> RK3399 and RK3288 shared the same eDP IP controller, only some light
> difference with VOP configure and GRF configure.
>
> Signed-off-by: Yakir Yang <ykk@rock-chips.com>
> Acked-by: Mark Yao <mark.yao@rock-chips.com>
> ---
> Changes in v3:
> - Give the "rk3399-edp" a separate line for clarity in document (Tomasz, reviewed at Google Gerrit)
>     [https://chromium-review.googlesource.com/#/c/346314/10/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt@5]
> - Move 'output_type' setting before the return statement (Tomasz, reviewed at Google Gerrit)
>     [https://chromium-review.googlesource.com/#/c/346314/10/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c@154]
> - Add the acked flag from Mark.
>
> Changes in v2:
> - rebase with drm-next, fix some conflicts
>
>  .../bindings/display/bridge/analogix_dp.txt        |  1 +
>  .../display/rockchip/analogix_dp-rockchip.txt      |  3 +-
>  drivers/gpu/drm/rockchip/analogix_dp-rockchip.c    | 33 +++++++++++++++++++++-
>  include/drm/bridge/analogix_dp.h                   |  1 +
>  4 files changed, 36 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> index 4f2ba8c..4a0f4f7 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> @@ -5,6 +5,7 @@ Required properties for dp-controller:
>                 platform specific such as:
>                  * "samsung,exynos5-dp"
>                  * "rockchip,rk3288-dp"
> +                * "rockchip,rk3399-edp"
>         -reg:
>                 physical base address of the controller and length
>                 of memory mapped region.
> diff --git a/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
> index e832ff9..726c945 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
> +++ b/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
> @@ -2,7 +2,8 @@ Rockchip RK3288 specific extensions to the Analogix Display Port
>  ================================
>
>  Required properties:
> -- compatible: "rockchip,rk3288-edp";
> +- compatible: "rockchip,rk3288-edp",
> +             "rockchip,rk3399-edp";
>
>  - reg: physical base address of the controller and length
>
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index 315ebba..bcd9ecc 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -153,6 +153,8 @@ rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder,
>                                       struct drm_connector_state *conn_state)
>  {
>         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
> +       struct rockchip_dp_device *dp = to_dp(encoder);
> +       int ret;
>
>         /*
>          * FIXME(Yakir): driver should configure the CRTC output video
> @@ -167,7 +169,28 @@ rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder,
>          * But if I configure CTRC to RGBaaa, and eDP driver still keep
>          * RGB666 input video mode, then screen would works prefect.
>          */
> -       s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
> +
> +       ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
> +       if (ret < 0)
> +               return 0;

What is s->output_mode set to in the failure case? How about s->output_type?

> +
> +       switch (dp->data->chip_type) {
> +       case RK3399_EDP:
> +               /*
> +                * For RK3399, VOP Lit must code the out mode to RGB888,
> +                * VOP Big must code the out mode to RGB10.
> +                */
> +               if (ret)
> +                       s->output_mode = ROCKCHIP_OUT_MODE_P888;
> +               else
> +                       s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
> +               break;
> +
> +       default:
> +               s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
> +               break;
> +       }
> +

This chunk seems overly complicated. I'd suggest:

s->output_type = DRM_MODE_CONNECTOR_eDP;
s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
if (dp->data->chip_type == RK3399_EDP) {
        ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
        if (ret > 0)
               s->output_mode = ROCKCHIP_OUT_MODE_P888;
}


>         s->output_type = DRM_MODE_CONNECTOR_eDP;
>
>         return 0;
> @@ -382,6 +405,13 @@ static const struct dev_pm_ops rockchip_dp_pm_ops = {
>         SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume)
>  };
>
> +static const struct rockchip_dp_chip_data rk3399_edp = {
> +       .lcdsel_grf_reg = 0x6250,
> +       .lcdsel_big = 0 | BIT(21),
> +       .lcdsel_lit = BIT(5) | BIT(21),
> +       .chip_type = RK3399_EDP,
> +};
> +
>  static const struct rockchip_dp_chip_data rk3288_dp = {
>         .lcdsel_grf_reg = 0x025c,
>         .lcdsel_big = 0 | BIT(21),
> @@ -391,6 +421,7 @@ static const struct rockchip_dp_chip_data rk3288_dp = {
>
>  static const struct of_device_id rockchip_dp_dt_ids[] = {
>         {.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
> +       {.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
>         {}
>  };
>  MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
> diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
> index 06c0250..82b8135 100644
> --- a/include/drm/bridge/analogix_dp.h
> +++ b/include/drm/bridge/analogix_dp.h
> @@ -20,6 +20,7 @@ enum analogix_dp_devtype {
>
>  enum analogix_dp_sub_devtype {
>         RK3288_DP,
> +       RK3399_EDP,
>  };
>
>  struct analogix_dp_plat_data {
> --
> 1.9.1
>
>
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