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

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Message-ID: <956ecdbd-2ea3-6dc9-d2fa-dbba797dddc0@baylibre.com>
Date:   Wed, 5 Jun 2019 14:59:22 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Andrzej Hajda <a.hajda@...sung.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 22/05/2019 08:07, Andrzej Hajda wrote:
> 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.

You are right, thanks for the review.

Do you have comments on the patches 2, 3 & 4 of serie ?

Thanks,
Neil

> 
> 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;
> 
>