[PATCH] imx-drm: imx-drm-core: add suspend/resume support
Marc Kleine-Budde
mkl at pengutronix.de
Thu Jul 24 02:56:32 PDT 2014
On 07/24/2014 11:47 AM, Lucas Stach wrote:
> Am Donnerstag, den 24.07.2014, 17:17 +0800 schrieb Shawn Guo:
>> HDMI currently stops working after a system suspend/resume cycle. It
>> turns out that the cause is the imx-hdmi encoder .dpms hook doesn't get
>> called from anywhere across suspend/resume cycle.
>>
>> The patch follows what exynos drm driver does to walk the list of
>> connectors and call their .dpms function from suspend/resume hook. And
>> the connectors' .dpms function will in turn filter down to the .dpms
>> hooks of encoders and CRTCs.
>>
>> With this change, HDMI can continue working after a suspend/resume
>> cycle.
>>
>> Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
>> ---
>> Tested with HDMI and LVDS. It'd be great if someone can help test TVE
>> to ensure the patch doesn't break anything.
>>
>> drivers/staging/imx-drm/imx-drm-core.c | 39 ++++++++++++++++++++++++++++++++++
>> 1 file changed, 39 insertions(+)
>>
>> diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
>> index def8280d7ee6..b0ea1f0ed32f 100644
>> --- a/drivers/staging/imx-drm/imx-drm-core.c
>> +++ b/drivers/staging/imx-drm/imx-drm-core.c
>> @@ -696,6 +696,44 @@ static int imx_drm_platform_remove(struct platform_device *pdev)
>> return 0;
>> }
>>
>> +#if CONFIG_PM_SLEEP
>
> use #ifdef
...or remove #if/#ifdef and mark as __maybe_unused
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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