linux-kernel - Re: [PATCH v4 05/11] drm/bridge: synopsys: dw-hdmi: allow ycbcr420 modes for >= 0x200a

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Message-ID: <e90331b8-5e8e-5c27-0297-77a281a66f4b@baylibre.com>
Date:   Fri, 7 Feb 2020 14:38:44 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     a.hajda@...sung.com, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, jernej.skrabec@...l.net,
        boris.brezillon@...labora.com
Cc:     linux-amlogic@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 05/11] drm/bridge: synopsys: dw-hdmi: allow ycbcr420
 modes for >= 0x200a

On 06/02/2020 20:18, Neil Armstrong wrote:
> Now the DW-HDMI Controller supports the HDMI2.0 modes, enable support
> for these modes in the connector if the platform supports them.
> We limit these modes to DW-HDMI IP version >= 0x200a which
> are designed to support HDMI2.0 display modes.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 6 ++++++
>  include/drm/bridge/dw_hdmi.h              | 1 +
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 15048ad694bc..4b35ea1427df 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -3231,6 +3231,12 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  	hdmi->bridge.of_node = pdev->dev.of_node;
>  #endif
>  
> +	if (hdmi->version >= 0x200a)
> +		hdmi->connector.ycbcr_420_allowed =
> +			hdmi->plat_data->ycbcr_420_allowed;
> +	else
> +		hdmi->connector.ycbcr_420_allowed = false;
> +
>  	memset(&pdevinfo, 0, sizeof(pdevinfo));
>  	pdevinfo.parent = dev;
>  	pdevinfo.id = PLATFORM_DEVID_AUTO;
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 9d4d5cc47969..0b34a12c4a1c 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -129,6 +129,7 @@ struct dw_hdmi_plat_data {
>  	unsigned long input_bus_format;
>  	unsigned long input_bus_encoding;
>  	bool use_drm_infoframe;
> +	bool ycbcr_420_allowed;
>  
>  	/* Vendor PHY support */
>  	const struct dw_hdmi_phy_ops *phy_ops;
> 

Forgot to add:
Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>

from 020c82bc-15fd-6e23-a093-62abfa9b466d@...sung.com

Neil