linux-kernel - Re: [PATCH v2 0/5] drm/bridge: ps8640: Make sure all needed is powered to get the EDID

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Date:   Wed, 26 Aug 2020 19:20:03 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     linux-kernel@...r.kernel.org,
        Collabora Kernel ML <kernel@...labora.com>,
        matthias.bgg@...il.com, drinkcat@...omium.org, hsinyi@...omium.org,
        laurent.pinchart@...asonboard.com,
        Andrzej Hajda <a.hajda@...sung.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Jonas Karlman <jonas@...boo.se>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 0/5] drm/bridge: ps8640: Make sure all needed is
 powered to get the EDID

Hi Enric

On Wed, Aug 26, 2020 at 10:15:21AM +0200, Enric Balletbo i Serra wrote:
> The first patch was initially part of the series [1] but for some reason
> was not picked when the series were merged, so I included in this series
> because it is needed to make the others to work properly.
> 
> The same happened for the second patch, was part of series [1] but not
> merged.
> 
> The third patch and next are part of the original series and are to rework
> the power handling to get the EDID. Basically, we need to make sure all the
> needed is powered to be able to get the EDID. Before, we saw that getting
> the EDID failed as explained in the third patch.
> 
> [1] https://lkml.org/lkml/2020/6/15/1208
> 
> Changes in v2:
> - Included the patch `drm/bridge_connector: Set default status connected for eDP connectors`
> - Included the patch `drm/bridge: ps8640: Get the EDID from eDP control`
> - Use drm_bridge_chain_pre_enable/post_disable() helpers (Sam Ravnborg)
> 
> Enric Balletbo i Serra (5):
>   drm/bridge_connector: Set default status connected for eDP connectors
>   drm/bridge: ps8640: Get the EDID from eDP control
>   drm/bridge: ps8640: Return an error for incorrect attach flags
>   drm/bridge: ps8640: Print an error if VDO control fails
The first 4 patches are applied to drm-misc-next.

>   drm/bridge: ps8640: Rework power state handling
Let give this a copuple of days on the mailing list to see what we
conclude.

	Sam
> 
>  drivers/gpu/drm/bridge/parade-ps8640.c | 89 ++++++++++++++++++++++----
>  drivers/gpu/drm/drm_bridge_connector.c |  1 +
>  2 files changed, 79 insertions(+), 11 deletions(-)
> 
> -- 
> 2.28.0