linux-kernel - Re: [PATCH v2 1/3] drm/mediatek: Switch the hdmi bridge ops to the atomic versions

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Date:   Tue, 30 Mar 2021 03:02:20 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com, dafna3@...il.com, chunkuang.hu@...nel.org,
        p.zabel@...gutronix.de, airlied@...ux.ie, daniel@...ll.ch,
        enric.balletbo@...labora.com
Subject: Re: [PATCH v2 1/3] drm/mediatek: Switch the hdmi bridge ops to the
 atomic versions

Hi Dafna,

Thank you for the patch.

On Mon, Mar 29, 2021 at 05:36:30PM +0200, Dafna Hirschfeld wrote:
> The bridge operation '.enable' and the audio cb '.get_eld'
> access hdmi->conn. In the future we will want to support
> the flag DRM_BRIDGE_ATTACH_NO_CONNECTOR and then we will
> not have direct access to the connector.
> The atomic version '.atomic_enable' allows accessing the
> current connector from the state.
> This patch switches the bridge to the atomic version to
> prepare access to the connector in later patches.
> 
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 23 +++++++++++++++--------
>  1 file changed, 15 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 8ee55f9e2954..f2c810b767ef 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -1357,7 +1357,8 @@ static bool mtk_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
>  	return true;
>  }
>  
> -static void mtk_hdmi_bridge_disable(struct drm_bridge *bridge)
> +static void mtk_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
> +					   struct drm_bridge_state *old_bridge_state)
>  {
>  	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
>  
> @@ -1371,7 +1372,8 @@ static void mtk_hdmi_bridge_disable(struct drm_bridge *bridge)
>  	hdmi->enabled = false;
>  }
>  
> -static void mtk_hdmi_bridge_post_disable(struct drm_bridge *bridge)
> +static void mtk_hdmi_bridge_atomic_post_disable(struct drm_bridge *bridge,
> +						struct drm_bridge_state *old_state)
>  {
>  	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
>  
> @@ -1406,7 +1408,8 @@ static void mtk_hdmi_bridge_mode_set(struct drm_bridge *bridge,
>  	drm_mode_copy(&hdmi->mode, adjusted_mode);
>  }
>  
> -static void mtk_hdmi_bridge_pre_enable(struct drm_bridge *bridge)
> +static void mtk_hdmi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
> +					      struct drm_bridge_state *old_state)
>  {
>  	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
>  
> @@ -1426,7 +1429,8 @@ static void mtk_hdmi_send_infoframe(struct mtk_hdmi *hdmi,
>  		mtk_hdmi_setup_vendor_specific_infoframe(hdmi, mode);
>  }
>  
> -static void mtk_hdmi_bridge_enable(struct drm_bridge *bridge)
> +static void mtk_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
> +					  struct drm_bridge_state *old_state)
>  {
>  	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
>  
> @@ -1440,13 +1444,16 @@ static void mtk_hdmi_bridge_enable(struct drm_bridge *bridge)
>  }
>  
>  static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
> +	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> +	.atomic_reset = drm_atomic_helper_bridge_reset,
>  	.attach = mtk_hdmi_bridge_attach,
>  	.mode_fixup = mtk_hdmi_bridge_mode_fixup,
> -	.disable = mtk_hdmi_bridge_disable,
> -	.post_disable = mtk_hdmi_bridge_post_disable,
> +	.atomic_disable = mtk_hdmi_bridge_atomic_disable,
> +	.atomic_post_disable = mtk_hdmi_bridge_atomic_post_disable,
>  	.mode_set = mtk_hdmi_bridge_mode_set,
> -	.pre_enable = mtk_hdmi_bridge_pre_enable,
> -	.enable = mtk_hdmi_bridge_enable,
> +	.atomic_pre_enable = mtk_hdmi_bridge_atomic_pre_enable,
> +	.atomic_enable = mtk_hdmi_bridge_atomic_enable,
>  };
>  
>  static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,

-- 
Regards,

Laurent Pinchart