Re: [PATCH v4 07/10] drm/bridge/synopsys: dw-hdmi: Use bridge->mode_valid() callback

[Neil Armstrong <narmstrong@baylibre.com>]

Hi Jose,

On 05/19/2017 02:52 AM, Jose Abreu wrote:
> Now that we have a callback to check if bridge supports a given mode
> we can use it in Synopsys Designware HDMI bridge so that we restrict
> the number of probbed modes to the ones we can actually display.
> 
> Also, there is no need to use mode_fixup() callback as mode_valid()
> will handle the mode validation.
> 
> NOTE: Only compile tested
> NOTE 2: I also had to change the pdata declaration of mode_valid
> custom callback so that the passed modes are const. I also changed
> in the platforms I found. Not even compiled it though.
> 
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Carlos Palminha <palminha@synopsys.com>
> Cc: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Dave Airlie <airlied@linux.ie>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Archit Taneja <architt@codeaurora.org>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 40 +++++++++--------------------
>  drivers/gpu/drm/imx/dw_hdmi-imx.c           |  4 +--
>  drivers/gpu/drm/meson/meson_dw_hdmi.c       |  2 +-
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c |  2 +-
>  include/drm/bridge/dw_hdmi.h                |  2 +-
>  5 files changed, 17 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 4e1f54a..864e946 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1881,24 +1881,6 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	return ret;
>  }
>  
> -static enum drm_mode_status
> -dw_hdmi_connector_mode_valid(struct drm_connector *connector,
> -			     struct drm_display_mode *mode)
> -{
> -	struct dw_hdmi *hdmi = container_of(connector,
> -					   struct dw_hdmi, connector);
> -	enum drm_mode_status mode_status = MODE_OK;
> -
> -	/* We don't support double-clocked modes */
> -	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
> -		return MODE_BAD;
> -
> -	if (hdmi->plat_data->mode_valid)
> -		mode_status = hdmi->plat_data->mode_valid(connector, mode);
> -
> -	return mode_status;
> -}
> -
>  static void dw_hdmi_connector_force(struct drm_connector *connector)
>  {
>  	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> @@ -1924,7 +1906,6 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
>  
>  static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
>  	.get_modes = dw_hdmi_connector_get_modes,
> -	.mode_valid = dw_hdmi_connector_mode_valid,
>  	.best_encoder = drm_atomic_helper_best_encoder,
>  };
>  
> @@ -1947,18 +1928,21 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
>  	return 0;
>  }
>  
> -static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
> -				      const struct drm_display_mode *orig_mode,
> -				      struct drm_display_mode *mode)
> +static enum drm_mode_status dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
> +						      const struct drm_display_mode *mode)
>  {
>  	struct dw_hdmi *hdmi = bridge->driver_private;
>  	struct drm_connector *connector = &hdmi->connector;
> -	enum drm_mode_status status;
> +	enum drm_mode_status mode_status = MODE_OK;
>  
> -	status = dw_hdmi_connector_mode_valid(connector, mode);
> -	if (status != MODE_OK)
> -		return false;
> -	return true;
> +	/* We don't support double-clocked modes */
> +	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
> +		return MODE_BAD;
> +
> +	if (hdmi->plat_data->mode_valid)
> +		mode_status = hdmi->plat_data->mode_valid(connector, mode);
> +
> +	return mode_status;
>  }
>  
>  static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
> @@ -2002,7 +1986,7 @@ static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
>  	.enable = dw_hdmi_bridge_enable,
>  	.disable = dw_hdmi_bridge_disable,
>  	.mode_set = dw_hdmi_bridge_mode_set,
> -	.mode_fixup = dw_hdmi_bridge_mode_fixup,
> +	.mode_valid = dw_hdmi_bridge_mode_valid,
>  };
>  
>  static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)
> diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> index f039641..5f561c8 100644
> --- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> +++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> @@ -148,7 +148,7 @@ static int dw_hdmi_imx_atomic_check(struct drm_encoder *encoder,
>  };
>  
>  static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
> -						  struct drm_display_mode *mode)
> +						  const struct drm_display_mode *mode)
>  {
>  	if (mode->clock < 13500)
>  		return MODE_CLOCK_LOW;
> @@ -160,7 +160,7 @@ static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
>  }
>  
>  static enum drm_mode_status imx6dl_hdmi_mode_valid(struct drm_connector *con,
> -						   struct drm_display_mode *mode)
> +						   const struct drm_display_mode *mode)
>  {
>  	if (mode->clock < 13500)
>  		return MODE_CLOCK_LOW;
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 7b86eb7..f043904 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -537,7 +537,7 @@ static irqreturn_t dw_hdmi_top_thread_irq(int irq, void *dev_id)
>  
>  /* TOFIX Enable support for non-vic modes */
>  static enum drm_mode_status dw_hdmi_mode_valid(struct drm_connector *connector,
> -					       struct drm_display_mode *mode)
> +					       const struct drm_display_mode *mode)
>  {
>  	unsigned int vclk_freq;
>  	unsigned int venc_freq;

For the meson/meson_dw_hdmi.c file :

Acked-by: Neil Armstrong <narmstrong@baylibre.com>

I can have a try in meson if you have a tree I can pull the full patchset from.

Neil