[PATCH v4 1/3] drm/exynos: mic: Add mode_set callback function

[Inki Dae]

2017년 01월 04일 15:58에 Hoegeun Kwon 이(가) 쓴 글:
> Before applying the patch, used the of_get_videomode function to
> parse the display-timings in the panel which is the child driver
> of dsi in the devicetree. this is wrong. So removed the
> of_get_videomode and fixed to get videomode struct through
> mode_set callback function.
> 
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon at samsung.com>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_mic.c | 33 
> ++++++++++++++++++++++-----------
>  1 file changed, 22 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c 
> b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> index a0def0b..9a50ceb 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> @@ -286,13 +286,6 @@ static int parse_dt(struct exynos_mic *mic)
>                       }
>                       nodes[j++] = remote_node;
>  
> -                     ret = of_get_videomode(remote_node,
> -                                                     &mic->vm, 0);
> -                     if (ret) {
> -                             DRM_ERROR("mic: failed to get videomode");
> -                             goto exit;
> -                     }
> -
>                       break;
>               default:
>                       DRM_ERROR("mic: Unknown endpoint from MIC");
> @@ -329,6 +322,27 @@ static void mic_post_disable(struct drm_bridge *bridge)
>       mutex_unlock(&mic_mutex);
>  }
>  
> +static void mic_mode_set(struct drm_bridge *bridge,
> +                     struct drm_display_mode *mode,
> +                     struct drm_display_mode *adjusted_mode)
> +{
> +     struct exynos_mic *mic = bridge->driver_private;
> +
> +     mutex_lock(&mic_mutex);
> +     if (mic->enabled)
> +             goto already_enabled;

mode setting should be performed every time mode_set callback is called so 
remove above two lines.

> +
> +     drm_display_mode_to_videomode(mode, &mic->vm);
> +
> +     if (!mic->i80_mode)
> +             mic_set_porch_timing(mic);
> +     mic_set_img_size(mic);
> +     mic_set_output_timing(mic);
> +
> +already_enabled:

So this label is unnecessary.

> +     mutex_unlock(&mic_mutex);
> +}
> +
>  static void mic_pre_enable(struct drm_bridge *bridge)
>  {
>       struct exynos_mic *mic = bridge->driver_private;
> @@ -355,10 +369,6 @@ static void mic_pre_enable(struct drm_bridge *bridge)
>               goto turn_off_clks;
>       }
>  
> -     if (!mic->i80_mode)
> -             mic_set_porch_timing(mic);
> -     mic_set_img_size(mic);
> -     mic_set_output_timing(mic);
>       mic_set_reg_on(mic, 1);
>       mic->enabled = 1;
>       mutex_unlock(&mic_mutex);
> @@ -377,6 +387,7 @@ static void mic_enable(struct drm_bridge *bridge) { }
>  static const struct drm_bridge_funcs mic_bridge_funcs = {
>       .disable = mic_disable,
>       .post_disable = mic_post_disable,
> +     .mode_set = mic_mode_set,
>       .pre_enable = mic_pre_enable,
>       .enable = mic_enable,
>  };
>