linux-kernel - Re: [PATCH 1/5] drm/bridge: dw-hdmi: allow ycbcr420 modes for >= 0x200a

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Message-ID: <020c82bc-15fd-6e23-a093-62abfa9b466d@samsung.com>
Date:   Wed, 22 May 2019 08:07:48 +0200
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        Laurent.pinchart@...asonboard.com
Cc:     jonas@...boo.se, hverkuil@...all.nl,
        dri-devel@...ts.freedesktop.org, jernej.skrabec@...l.net,
        heiko@...ech.de, maxime.ripard@...tlin.com, hjc@...k-chips.com,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] drm/bridge: dw-hdmi: allow ycbcr420 modes for >=
 0x200a

On 20.05.2019 15:37, 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>
> Tested-by: Heiko Stuebner <heiko@...ech.de>
> ---
>  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 ab7968c8f6a2..b50c49caf7ae 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2629,6 +2629,12 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  	if (hdmi->phy.ops->setup_hpd)
>  		hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data);
>  
> +	if (hdmi->version >= 0x200a)
> +		hdmi->connector.ycbcr_420_allowed =
> +			hdmi->plat_data->ycbcr_420_allowed;
> +	else
> +		hdmi->connector.ycbcr_420_allowed = false;
> +


I suspect else clause can be dropped.

Beside this:

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

 --
Regards
Andrzej


>  	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 66e70770cce5..0f0e82638fbe 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -130,6 +130,7 @@ struct dw_hdmi_plat_data {
>  					   const struct drm_display_mode *mode);
>  	unsigned long input_bus_format;
>  	unsigned long input_bus_encoding;
> +	bool ycbcr_420_allowed;
>  
>  	/* Vendor PHY support */
>  	const struct dw_hdmi_phy_ops *phy_ops;