Hi,
On 27 March 2013 15:53, Inki Dae <inki.dae@xxxxxxxxxxx> wrote:
> 2013/3/20 Vikas Sajjan <vikas.sajjan@xxxxxxxxxx>:
>> While migrating to common clock framework (CCF), found that the FIMD clocks
>> were pulled down by the CCF.
>> If CCF finds any clock(s) which has NOT been claimed by any of the
>> drivers, then such clock(s) are PULLed low by CCF.
>>
>> By calling clk_prepare_enable() for FIMD clocks fixes the issue.
>>
>> this patch also replaces clk_disable() with clk_disable_unprepare()
>> during exit.
>>
>> Signed-off-by: Vikas Sajjan <vikas.sajjan@xxxxxxxxxx>
>> ---
>> Changes since v1:
>> - added error checking for clk_prepare_enable() and also replaced
>> clk_disable() with clk_disable_unprepare() during exit.
>> ---
>> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 17 +++++++++++++++--
>> 1 file changed, 15 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
>> index 9537761..014d750 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
>> @@ -934,6 +934,19 @@ static int fimd_probe(struct platform_device *pdev)
>> return ret;
>> }
>>
>> + ret = clk_prepare_enable(ctx->lcd_clk);
>> + if (ret) {
>> + dev_err(dev, "failed to enable 'sclk_fimd' clock\n");
>> + return ret;
>> + }
>> +
>> + ret = clk_prepare_enable(ctx->bus_clk);
>> + if (ret) {
>> + clk_disable_unprepare(ctx->lcd_clk);
>> + dev_err(dev, "failed to enable 'fimd' clock\n");
>> + return ret;
>> + }
>> +
>
> Please remove the above two clk_prepare_enable function calls and use
> them in fimd_clock() instead of clk_enable/disable(). When probed,
> fimd clock will be enabled by runtime pm.
>
Sure, will modify and resend.
> Thanks,
> Inki Dae
>
>> ctx->vidcon0 = pdata->vidcon0;
>> ctx->vidcon1 = pdata->vidcon1;
>> ctx->default_win = pdata->default_win;
>> @@ -981,8 +994,8 @@ static int fimd_remove(struct platform_device *pdev)
>> if (ctx->suspended)
>> goto out;
>>
>> - clk_disable(ctx->lcd_clk);
>> - clk_disable(ctx->bus_clk);
>> + clk_disable_unprepare(ctx->lcd_clk);
>> + clk_disable_unprepare(ctx->bus_clk);
>>
>> pm_runtime_set_suspended(dev);
>> pm_runtime_put_sync(dev);
>> --
>> 1.7.9.5
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@xxxxxxxxxxxxxxxxxxxxx
>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Thanks and Regards
Vikas Sajjan
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