linux-kernel - Re: [PATCH v2 24/28] drm/i2c: tda998x: adjust the audio CTS to the mode clock

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Date:	Thu, 9 Jan 2014 12:27:09 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Jean-Francois Moine <moinejf@...e.fr>
Cc:	dri-devel@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
	Dave Airlie <airlied@...il.com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 24/28] drm/i2c: tda998x: adjust the audio CTS to the
	mode clock

On Thu, Jan 09, 2014 at 12:07:02PM +0100, Jean-Francois Moine wrote:
> 
> Signed-off-by: Jean-Francois Moine <moinejf@...e.fr>
> ---
>  drivers/gpu/drm/i2c/tda998x_drv.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
> index 68630b8..c2163f4 100644
> --- a/drivers/gpu/drm/i2c/tda998x_drv.c
> +++ b/drivers/gpu/drm/i2c/tda998x_drv.c
> @@ -723,7 +723,7 @@ tda998x_configure_audio(struct tda998x_priv *priv,
>  		struct drm_display_mode *mode)
>  {
>  	uint8_t buf[6], clksel_aip, clksel_fs, cts_n, adiv;
> -	uint32_t n;
> +	uint32_t n, cts;
>  
>  	/* Enable audio ports */
>  	reg_write(priv, REG_ENA_AP, priv->audio_port);
> @@ -777,9 +777,10 @@ tda998x_configure_audio(struct tda998x_priv *priv,
>  	n = 128 * AUDIO_SAMPLE;		/* acr_n = 128 * sample_rate / 1000 */
>  
>  	/* Write the CTS and N values */
> -	buf[0] = 0x44;
> -	buf[1] = 0x42;
> -	buf[2] = 0x01;
> +	cts = mode->clock;
> +	buf[0] = cts;
> +	buf[1] = cts >> 8;
> +	buf[2] = cts >> 16;

NAK.  We use auto-CTS mode, so the actual programmed CTS value is
entirely irrelevant.

-- 
FTTC broadband for 0.8mile line: 5.8Mbps down 500kbps up.  Estimation
in database were 13.1 to 19Mbit for a good line, about 7.5+ for a bad.
Estimate before purchase was "up to 13.2Mbit".
--
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