linux-kernel - Re: [RFC 1/3] saa7115: Set saa7113 init to values from datasheet

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Message-ID: <20130529213554.690f7eaa@redhat.com>
Date:	Wed, 29 May 2013 21:35:54 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Jon Arne Jørgensen <jonarne@...arne.no>
Cc:	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	hans.verkuil@...co.com, prabhakar.csengg@...il.com,
	g.liakhovetski@....de, ezequiel.garcia@...e-electrons.com,
	timo.teras@....fi
Subject: Re: [RFC 1/3] saa7115: Set saa7113 init to values from datasheet

Em Wed, 29 May 2013 22:41:16 +0200
Jon Arne Jørgensen <jonarne@...arne.no> escreveu:

> Change all default values in the initial setup table to match the table
> in the datasheet.

This is not a good idea, as it can produce undesired side effects
on the existing drivers that depend on it, and can't be easily
tested.

Please, don't change the current "default". It is, of course, OK
to change them if needed via the information provided inside the
platform data.

Regards,
Mauro
> 
> Signed-off-by: Jon Arne Jørgensen <jonarne@...arne.no>
> ---
>  drivers/media/i2c/saa7115.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/i2c/saa7115.c b/drivers/media/i2c/saa7115.c
> index d6f589a..4403679 100644
> --- a/drivers/media/i2c/saa7115.c
> +++ b/drivers/media/i2c/saa7115.c
> @@ -223,12 +223,12 @@ static const unsigned char saa7111_init[] = {
>  static const unsigned char saa7113_init[] = {
>  	R_01_INC_DELAY, 0x08,
>  	R_02_INPUT_CNTL_1, 0xc2,
> -	R_03_INPUT_CNTL_2, 0x30,
> +	R_03_INPUT_CNTL_2, 0x33,
>  	R_04_INPUT_CNTL_3, 0x00,
>  	R_05_INPUT_CNTL_4, 0x00,
> -	R_06_H_SYNC_START, 0x89,
> +	R_06_H_SYNC_START, 0xe9,
>  	R_07_H_SYNC_STOP, 0x0d,
> -	R_08_SYNC_CNTL, 0x88,
> +	R_08_SYNC_CNTL, 0x98,
>  	R_09_LUMA_CNTL, 0x01,
>  	R_0A_LUMA_BRIGHT_CNTL, 0x80,
>  	R_0B_LUMA_CONTRAST_CNTL, 0x47,
> @@ -236,11 +236,11 @@ static const unsigned char saa7113_init[] = {
>  	R_0D_CHROMA_HUE_CNTL, 0x00,
>  	R_0E_CHROMA_CNTL_1, 0x01,
>  	R_0F_CHROMA_GAIN_CNTL, 0x2a,
> -	R_10_CHROMA_CNTL_2, 0x08,
> +	R_10_CHROMA_CNTL_2, 0x00,
>  	R_11_MODE_DELAY_CNTL, 0x0c,
> -	R_12_RT_SIGNAL_CNTL, 0x07,
> +	R_12_RT_SIGNAL_CNTL, 0x01,
>  	R_13_RT_X_PORT_OUT_CNTL, 0x00,
> -	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
> +	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,	/* RESERVED */
>  	R_15_VGATE_START_FID_CHG, 0x00,
>  	R_16_VGATE_STOP, 0x00,
>  	R_17_MISC_VGATE_CONF_AND_MSB, 0x00,


-- 

Cheers,
Mauro
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