From: Donghwa Lee <dh09.lee@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH V2 1/4] EXYNOS5: Change parent clock of FIMD to MPLL
Date: Mon, 17 Dec 2012 10:12:08 +0900 [thread overview]
Message-ID: <50CE7168.9060808@samsung.com> (raw)
In-Reply-To: <50CC0700.6040308@samsung.com>
On 2012? 12? 15? 14:13, Minkyu Kang wrote:
> Dear Donghwa,
>
> On 13/12/12 20:29, Ajay Kumar wrote:
>> With VPLL as source clock to FIMD,
>> Exynos DP Initializaton was failing sometimes with unstable clock.
>> Changing FIMD source to MPLL resolves this issue.
>>
>> Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
>> Acked-by: Simon Glass <sjg@chromium.org>
>> ---
>> arch/arm/cpu/armv7/exynos/clock.c | 2 +-
>> 1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
>> index fe61f88..bfcd5f7 100644
>> --- a/arch/arm/cpu/armv7/exynos/clock.c
>> +++ b/arch/arm/cpu/armv7/exynos/clock.c
>> @@ -603,7 +603,7 @@ void exynos5_set_lcd_clk(void)
>> */
>> cfg = readl(&clk->src_disp1_0);
>> cfg &= ~(0xf);
>> - cfg |= 0x8;
>> + cfg |= 0x6;
> Please check it.
In order to use the configured refresh rate as closely as possible, it
is more proper value(MPLL: 0x6) than
using VPLL as source clock.
Thank you,
Donghwa Lee
next prev parent reply other threads:[~2012-12-17 1:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-13 11:29 [U-Boot] [PATCH V2 0/4] Add support for FIMD and DP on SMDK5250 Ajay Kumar
2012-12-13 11:29 ` [U-Boot] [PATCH V2 1/4] EXYNOS5: Change parent clock of FIMD to MPLL Ajay Kumar
2012-12-15 5:13 ` Minkyu Kang
2012-12-17 1:12 ` Donghwa Lee [this message]
2012-12-13 11:29 ` [U-Boot] [PATCH RESEND 2/4] video: Fix compilation dependency of exynos_dp and exynos_mipi on exynos_fb Ajay Kumar
2012-12-15 5:25 ` Minkyu Kang
2012-12-17 0:53 ` Donghwa Lee
2012-12-13 11:29 ` [U-Boot] [PATCH V2 3/4] video: Modify exynos_fimd driver to support LCD console Ajay Kumar
2012-12-14 22:38 ` Simon Glass
2012-12-13 11:29 ` [U-Boot] [PATCH V2 4/4] EXYNOS5: Add support for FIMD and DP Ajay Kumar
2012-12-15 5:22 ` Minkyu Kang
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