[PATCH] drm/bridge: analogix dp: Fix runtime PM state in get_modes() callback

Marek Szyprowski m.szyprowski at samsung.com
Tue Dec 5 14:12:05 UTC 2017

Hi Misha,

On 2017-12-05 15:06, Misha Komarovskiy wrote:
> On Mon, Nov 27, 2017 at 6:40 AM, Archit Taneja <architt at codeaurora.org> wrote:
>> On 11/21/2017 01:19 PM, Marek Szyprowski wrote:
>>> get_modes() callback might be called asynchronously from the DRM core and
>>> it is not synchronized with bridge_enable(), which sets proper runtime PM
>>> state of the main DP device. Fix this by calling pm_runtime_get_sync()
>>> before calling drm_get_edid(), which in turn calls drm_dp_i2c_xfer() and
>>> analogix_dp_transfer() to ensure that main DP device is runtime active
>>> when doing any access to its registers.
>> Looks good to me. Would be nice to get an ack from rockchip too. Will queue
>> it
>> to drm-misc-fixes (so that it's merged for 4.15-rc2) if no one has any
>> objections.
> After this patch accepted to 4.15-rc2 any chances to have it also in
> 4.14 stable?
> I tested it manualy and it fixes boot freeze on snow with 4.14.
> If required,
> Tested-by: Misha Komarovskiy <zombah at gmail.com>

The patch is tagged cc: stable, so it should automatically get into v4.14.y
series once it finally lands in v4.15-rcX series.

 > ...

Best regards
Marek Szyprowski, PhD
Samsung R&D Institute Poland

More information about the dri-devel mailing list