[RESEND PATCH] drm/hisilicon: Ensure LDI regs are properly configured.

[John Stultz]

On Thu, Jun 29, 2017 at 1:54 PM, Peter Griffin <peter.griffin at linaro.org> wrote:
> This patch fixes the following soft lockup:
>   BUG: soft lockup - CPU#0 stuck for 23s! [weston:307]
>
> On weston idle-timeout the IP is powered down and reset
> asserted. On weston resume we get a massive vblank
> IRQ storm due to the LDI registers having lost some state.
>
> This state loss is caused by ade_crtc_atomic_begin() not
> calling ade_ldi_set_mode(). With this patch applied
> resuming from Weston idle-timeout works well.
>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>

While the issue hasn't seemingly come up with Android, I've been
running with this patch in my tree for a while without issue. So..
Tested-by: John Stultz <john.stultz at linaro.org>

thanks
-john