On 09/27/2016 06:58 PM, Sean Paul wrote:
> On Fri, Sep 23, 2016 at 10:06 AM, Tomeu Vizoso
> <[email protected]> wrote:
>> There's no point in enabling PSR when the panel doesn't support it.
>>
>> This also avoids a problem when PSR gets enabled when a CRTC is being
>> disabled, because sometimes in that situation the DSP_HOLD_VALID_INTR
>> interrupt on which we wait will never arrive. This was observed on
>> RK3288 with a panel without PSR (veyron-jaq Chromebook).
>>
>> It's very easy to reproduce by running the kms_rmfb test in IGT a few
>> times.
>>
>> Signed-off-by: Tomeu Vizoso <[email protected]>
>
> Thanks for digging into this.
>
> Reviewed-by: Sean Paul <[email protected]>
>
queued to drm-misc.
Archit
>
>
>> Cc: Sean Paul <[email protected]>
>> Cc: Yakir Yang <[email protected]>
>> Cc: Archit Taneja <[email protected]>
>> ---
>> drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> index e83be157cc2a..8548e8271639 100644
>> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> @@ -85,6 +85,9 @@ static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
>> struct rockchip_dp_device *dp = to_dp(encoder);
>> unsigned long flags;
>>
>> + if (!analogix_dp_psr_supported(dp->dev))
>> + return;
>> +
>> dev_dbg(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit");
>>
>> spin_lock_irqsave(&dp->psr_lock, flags);
>> --
>> 2.7.4
>>
--
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