Subject: [PATCH v2 3/3] ARM: Samsung: Rework platform data of s3c-fb driver

From: [email-masked] (Darius Augulis)
Date: Wed, 14 Mar 2012 20:39:04 +0200

On 03/14/2012 03:51 AM, Jingoo Han wrote:
>> -----Original Message-----
>> From: Thomas Abraham [mailto:thomas.abraham at linaro.org]
>> Sent: Tuesday, March 13, 2012 7:11 PM
>> To: Jingoo Han
>> Cc: linux-fbdev at vger.kernel.org; FlorianSchandinat at gmx.de; linux-arm-kernel at lists.infradead.org; linux-
>> samsung-soc at vger.kernel.org; kgene.kim at samsung.com; ben-linux at fluff.org; patches at linaro.org; Kyungmin
>> Park; JeongHyeon Kim; Heiko Stuebner; Kwangwoo Lee; Mark Brown; Peter Korsgaard; Darius Augulis; Maurus
>> Cuelenaere
>> Subject: Re: [PATCH v2 3/3] ARM: Samsung: Rework platform data of s3c-fb driver
>>
>> On 13 March 2012 15:17, Jingoo Han<[email-masked]>  wrote:
>>>> -----Original Message-----
>>>> From: Thomas Abraham [mailto:thomas.abraham at linaro.org]
>>>> Sent: Tuesday, March 13, 2012 6:00 AM
>>>> To: linux-fbdev at vger.kernel.org
>>>> Cc: FlorianSchandinat at gmx.de; linux-arm-kernel at lists.infradead.org; linux-samsung-soc at vger.kernel.org;
>>>> kgene.kim at samsung.com; jg1.han at samsung.com; ben-linux at fluff.org; patches at linaro.org; Kyungmin Park;
>>>> JeongHyeon Kim; Heiko Stuebner; Kwangwoo Lee; Mark Brown; Peter Korsgaard; Darius Augulis; Maurus
>>>> Cuelenaere
>>>> Subject: [PATCH v2 3/3] ARM: Samsung: Rework platform data of s3c-fb driver
>>>>
>>>> For all the Samsung SoC based boards which have the platform data for
>>>> s3c-fb driver, the 'default_win' element in the platform data is removed
>>>> and the lcd panel video timing values are moved out of individual window
>>>> configuration data.
>>>>
>>>> Cc: Jingoo Han<[email-masked]>
>>>> Cc: Kyungmin Park<[email-masked]>
>>>> Cc: JeongHyeon Kim<[email-masked]>
>>>> Cc: Kukjin Kim<[email-masked]>
>>>> Cc: Heiko Stuebner<[email-masked]>
>>>> Cc: Ben Dooks<[email-masked]>
>>>> Cc: Kwangwoo Lee<[email-masked]>
>>>> Cc: Mark Brown<[email-masked]>
>>>> Cc: Peter Korsgaard<[email-masked]>
>>>> Cc: Darius Augulis<[email-masked]>
>>>> Cc: Maurus Cuelenaere<[email-masked]>
>>>> Signed-off-by: Thomas Abraham<[email-masked]>
>>>> ---
>>>>   arch/arm/mach-exynos/mach-nuri.c           |   26 ++++++++++-------
>>>>   arch/arm/mach-exynos/mach-origen.c         |   24 ++++++++++-------
>>>>   arch/arm/mach-exynos/mach-smdkv310.c       |   28 +++++++++++--------
>>>>   arch/arm/mach-exynos/mach-universal_c210.c |   26 ++++++++++-------
>>>>   arch/arm/mach-s3c24xx/mach-smdk2416.c      |   27 ++++++++++--------
>>>>   arch/arm/mach-s3c64xx/mach-anw6410.c       |   25 ++++++++++-------
>>>>   arch/arm/mach-s3c64xx/mach-crag6410.c      |   25 ++++++++++-------
>>>>   arch/arm/mach-s3c64xx/mach-hmt.c           |   24 ++++++++++-------
>>>>   arch/arm/mach-s3c64xx/mach-mini6410.c      |   40 ++++++++++++---------------
>>>>   arch/arm/mach-s3c64xx/mach-real6410.c      |   40 ++++++++++++---------------
>>>>   arch/arm/mach-s3c64xx/mach-smartq5.c       |   26 ++++++++++-------
>>>>   arch/arm/mach-s3c64xx/mach-smartq7.c       |   26 ++++++++++-------
>>>>   arch/arm/mach-s3c64xx/mach-smdk6410.c      |   25 ++++++++++-------
>>>>   arch/arm/mach-s5p64x0/mach-smdk6440.c      |   24 ++++++++++-------
>>>>   arch/arm/mach-s5p64x0/mach-smdk6450.c      |   24 ++++++++++-------
>>>>   arch/arm/mach-s5pc100/mach-smdkc100.c      |   27 ++++++++++--------
>>>>   arch/arm/mach-s5pv210/mach-aquila.c        |   36 +++++++++++--------------
>>>>   arch/arm/mach-s5pv210/mach-goni.c          |   26 ++++++++++-------
>>>>   arch/arm/mach-s5pv210/mach-smdkv210.c      |   24 ++++++++++-------
>>>>   19 files changed, 285 insertions(+), 238 deletions(-)
>>>>
>>> [.....]
>>>
>>>> diff --git a/arch/arm/mach-s3c64xx/mach-mini6410.c b/arch/arm/mach-s3c64xx/mach-mini6410.c
>>>> index c34c2ab..24dcdc9 100644
>>>> --- a/arch/arm/mach-s3c64xx/mach-mini6410.c
>>>> +++ b/arch/arm/mach-s3c64xx/mach-mini6410.c
>>>> @@ -153,36 +153,32 @@ static struct s3c2410_platform_nand mini6410_nand_info = {
>>>>
>>>>   static struct s3c_fb_pd_win mini6410_fb_win[] = {
>>>>        {
>>>> -             .win_mode       = {     /* 4.3" 480x272 */
>>>> -                     .left_margin    = 3,
>>>> -                     .right_margin   = 2,
>>>> -                     .upper_margin   = 1,
>>>> -                     .lower_margin   = 1,
>>>> -                     .hsync_len      = 40,
>>>> -                     .vsync_len      = 1,
>>>> -                     .xres           = 480,
>>>> -                     .yres           = 272,
>>>> -             },
>>>>                .max_bpp        = 32,
>>>>                .default_bpp    = 16,
>>>> +             .xres           = 480,
>>>> +             .yres           = 272,
>>>>        }, {
>>>> -             .win_mode       = {     /* 7.0" 800x480 */
>>>> -                     .left_margin    = 8,
>>>> -                     .right_margin   = 13,
>>>> -                     .upper_margin   = 7,
>>>> -                     .lower_margin   = 5,
>>>> -                     .hsync_len      = 3,
>>>> -                     .vsync_len      = 1,
>>>> -                     .xres           = 800,
>>>> -                     .yres           = 480,
>>>> -             },
>>>>                .max_bpp        = 32,
>>>>                .default_bpp    = 16,
>>>> +             .xres           = 800,
>>>> +             .yres           = 480,
>>>>        },
>>>>   };
>>>>
>>>> +static struct fb_videomode mini6410_lcd_timing = {
>>>> +     .left_margin    = 8,
>>>> +     .right_margin   = 13,
>>>> +     .upper_margin   = 7,
>>>> +     .lower_margin   = 5,
>>>> +     .hsync_len      = 3,
>>>> +     .vsync_len      = 1,
>>>> +     .xres           = 800,
>>>> +     .yres           = 480,
>>>> +};
>>>> +
>>>>   static struct s3c_fb_platdata mini6410_lcd_pdata __initdata = {
>>>>        .setup_gpio     = s3c64xx_fb_gpio_setup_24bpp,
>>>> +     .vtiming        =&mini6410_lcd_timing,
>>>>        .win[0]         =&mini6410_fb_win[0],
>>>>        .vidcon0        = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
>>>>        .vidcon1        = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
>>>> @@ -310,8 +306,8 @@ static void __init mini6410_machine_init(void)
>>>>        mini6410_lcd_pdata.win[0] =&mini6410_fb_win[features.lcd_index];
>>>>
>>>>        printk(KERN_INFO "MINI6410: selected LCD display is %dx%d\n",
>>>> -             mini6410_lcd_pdata.win[0]->win_mode.xres,
>>>> -             mini6410_lcd_pdata.win[0]->win_mode.yres);
>>>> +             mini6410_lcd_pdata.win[0]->xres,
>>>> +             mini6410_lcd_pdata.win[0]->yres);
>>>>
>>>>        s3c_nand_set_platdata(&mini6410_nand_info);
>>>>        s3c_fb_set_platdata(&mini6410_lcd_pdata);
>>>> diff --git a/arch/arm/mach-s3c64xx/mach-real6410.c b/arch/arm/mach-s3c64xx/mach-real6410.c
>>>> index be2a9a2..41e4f74 100644
>>>> --- a/arch/arm/mach-s3c64xx/mach-real6410.c
>>>> +++ b/arch/arm/mach-s3c64xx/mach-real6410.c
>>>> @@ -119,36 +119,32 @@ static struct platform_device real6410_device_eth = {
>>>>
>>>>   static struct s3c_fb_pd_win real6410_fb_win[] = {
>>>>        {
>>>> -             .win_mode       = {     /* 4.3" 480x272 */
>>>> -                     .left_margin    = 3,
>>>> -                     .right_margin   = 2,
>>>> -                     .upper_margin   = 1,
>>>> -                     .lower_margin   = 1,
>>>> -                     .hsync_len      = 40,
>>>> -                     .vsync_len      = 1,
>>>> -                     .xres           = 480,
>>>> -                     .yres           = 272,
>>>> -             },
>>>>                .max_bpp        = 32,
>>>>                .default_bpp    = 16,
>>>> +             .xres           = 480,
>>>> +             .yres           = 272,
>>>>        }, {
>>>> -             .win_mode       = {     /* 7.0" 800x480 */
>>>> -                     .left_margin    = 8,
>>>> -                     .right_margin   = 13,
>>>> -                     .upper_margin   = 7,
>>>> -                     .lower_margin   = 5,
>>>> -                     .hsync_len      = 3,
>>>> -                     .vsync_len      = 1,
>>>> -                     .xres           = 800,
>>>> -                     .yres           = 480,
>>>> -             },
>>>>                .max_bpp        = 32,
>>>>                .default_bpp    = 16,
>>>> +             .xres           = 800,
>>>> +             .yres           = 480,
>>>>        },
>>>>   };
>>>>
>>>> +static struct fb_videomode real6410_lcd_timing = {
>>>> +     .left_margin    = 3,
>>>> +     .right_margin   = 2,
>>>> +     .upper_margin   = 1,
>>>> +     .lower_margin   = 1,
>>>> +     .hsync_len      = 40,
>>>> +     .vsync_len      = 1,
>>>> +     .xres           = 800,
>>>> +     .yres           = 480,
>>>> +};
>>>
>>> What is the difference between mini6410_lcd_timing and real6410_lcd_timing?
>>> In my opinion, it would be good as follows:
>>>
>>> +static struct fb_videomode real6410_lcd_timing = {
>>> +       .left_margin    = 8,
>>> +       .right_margin   = 13,
>>> +       .upper_margin   = 7,
>>> +       .lower_margin   = 5,
>>> +       .hsync_len      = 3,
>>> +       .vsync_len      = 1,
>>> +       .xres           = 800,
>>> +       .yres           = 480,
>>> +};
>>>
>>>
>> Before this patch series, both real6410 and mini6410 had 'default_win'
>> = 0 in the platform data. And, the s3c-fb driver selected the video
>> timing from the window selected by the default_win parameter in s3c-fb
>> platform data, i.e window 0 for both mini6440 and real6410. So, in
>> this patch, while moving the timing values out of window data, the
>> timing values for window 0 was selected.
>>
>> The timing value for window 1 was never used on mini6410 and real6410.
>> So I would suggest to use timing value of window 0 in this patch.
> OK, I see.
> Then, as you mentioned above, the timing value of mini6410 and real6410 should be same.
> Also, the mini6410 should use the timing value for window 0 as below.
>
> Also, this timing value is used for 4.3" 480x272 LCD.
> So, xres and yres would be 480 and 272, respectively, instead of 800 and 480.
>
> The mini6410 seems to use 4.3" 480x272 LCD as default LCD.
> Please refer to 'http://www.friendlyarm.net/products/mini6410'.
>
> Also, real6410 seems to use 4.3" 480x272 LCD as default LCD.
> http://s3c6410kits.googlecode.com/files/overview_Real6410.pdf
>
> Therefore, given this, the timing value of mini6410 and real6410 would be as follows.
>
> +static struct fb_videomode mini6410_lcd_timing = {
> +	.left_margin	= 8,
> +	.right_margin	= 13,
> +	.upper_margin	= 7,
> +	.lower_margin	= 5,
> +	.hsync_len	= 3,
> +	.vsync_len	= 1,
> +	.xres		= 480,
> +	.yres		= 272,
> +};
>
> +static struct fb_videomode real6410_lcd_timing = {
> +	.left_margin	= 8,
> +	.right_margin	= 13,
> +	.upper_margin	= 7,
> +	.lower_margin	= 5,
> +	.hsync_len	= 3,
> +	.vsync_len	= 1,
> +	.xres		= 480,
> +	.yres		= 272,
> +};
>
> Darius Augulis, can you confirm it?
> (Darius Augulis is a maintainer for real6410 and mini6410 boards.)

Are you going to leave only single LCD resolution for every of two 
boards? If so, then my answer is no.
I have mini6410 with both 4.3" and 7" LCDs and real6410 with 7" LCD. Now 
we have possibility to choose LCD size dynamically - leave it there.
What you mean "default" 4.3" size LCD? The 7" size LCD is also provided 
by board sellers - I've bought it.

regards,
Darius Augulis

>
> Best regards,
> Jingoo Han
>
>> Thanks for your comments.
>>
>> Regards,
>> Thomas.
>