linux-kernel - Re: [PATCH 4/4 v2] drm/bridge: adv7511: Initialize audio packet on adv7533

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Date:   Fri, 2 Sep 2016 15:19:17 +0530
From:   Archit Taneja <architt@...eaurora.org>
To:     John Stultz <john.stultz@...aro.org>,
        lkml <linux-kernel@...r.kernel.org>
Cc:     Andy Green <andy.green@...aro.org>,
        David Airlie <airlied@...ux.ie>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Andy Green <andy@...mcat.com>,
        Dave Long <dave.long@...aro.org>,
        Guodong Xu <guodong.xu@...aro.org>,
        Zhangfei Gao <zhangfei.gao@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Jose Abreu <joabreu@...opsys.com>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 4/4 v2] drm/bridge: adv7511: Initialize audio packet on
 adv7533

Hi,

On 8/30/2016 5:11 AM, John Stultz wrote:
> From: Andy Green <andy.green@...aro.org>
>
> Set the initial audio packet settings to allow the audio
> driver to work.
>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Archit Taneja <architt@...eaurora.org>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Cc: "Ville Syrjälä" <ville.syrjala@...ux.intel.com>
> Cc: Boris Brezillon <boris.brezillon@...e-electrons.com>
> Cc: Andy Green <andy@...mcat.com>
> Cc: Dave Long <dave.long@...aro.org>
> Cc: Guodong Xu <guodong.xu@...aro.org>
> Cc: Zhangfei Gao <zhangfei.gao@...aro.org>
> Cc: Mark Brown <broonie@...nel.org>
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Cc: Jose Abreu <joabreu@...opsys.com>
> Cc: dri-devel@...ts.freedesktop.org
> Signed-off-by: Andy Green <andy.green@...aro.org>
> [jstultz: Forward ported to mainline, changed to use register
>   names rather then hex values, and removed config values set by
>   audio driver.]
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
>   drivers/gpu/drm/bridge/adv7511/adv7533.c | 22 ++++++++++++++++++++++
>   1 file changed, 22 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
> index 6798ecf..cced7c9 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
> @@ -104,6 +104,28 @@ void adv7533_dsi_power_on(struct adv7511 *adv)
>   	/* disable test mode */
>   	regmap_write(adv->regmap_cec, 0x55, 0x00);
>
> +	/* hide Audio infoframe updates */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_INFOFRAME_UPDATE,
> +				BIT(5), BIT(5));
> +	/* enable N/CTS, enable Audio sample packets */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_PACKET_ENABLE1,
> +				BIT(5), BIT(5));
> +	/* enable N/CTS */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_PACKET_ENABLE1,
> +				BIT(6), BIT(6));
> +	/* not copyrighted */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_AUDIO_CFG1,
> +				BIT(5), BIT(5));
> +	/* enable audio infoframes */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_PACKET_ENABLE1,
> +				BIT(3), BIT(3));
> +	/* AV mute disable */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_GC(0),
> +				BIT(7) | BIT(6), BIT(7));
> +	/* use Audio infoframe updated info */
> +	regmap_update_bits(adv->regmap, ADV7511_REG_GC(1),
> +				BIT(5), 0);
> +

Wouldn't these writes be needed by ADV751x chips too? These seem to
belong to the main ADV75xx regmap. These should probably be a separate 
func in adv7511_audio.c or adv7511_drv.c, and it should be called in
adv7511_power_on, so that ADV751x chips can utilize this too.

Thanks,
Archit

>   	regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
>   			      ARRAY_SIZE(adv7533_cec_fixed_registers));
>   }
>

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