From: Archit Taneja <architt@codeaurora.org>
To: Alexandru M Stan <amstan@chromium.org>,
David Airlie <airlied@linux.ie>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Andrzej Hajda <a.hajda@samsung.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Sean Paul <seanpaul@chromium.org>
Cc: devicetree@vger.kernel.org,
Enric Balletbo i Serra <enric.balletbo@collabora.com>,
Heiko Stuebner <heiko@sntech.de>,
briannorris@chromium.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, dianders@chromium.org,
linux-rockchip@lists.infradead.org, marcheu@chromium.org,
hoegsberg@chromium.org,
Thierry Escande <thierry.escande@collabora.com>,
Jeffy Chen <jeffy.chen@rock-chips.com>
Subject: Re: [PATCH 1/2] dt-bindings: analogix-dp: Add backlight-pwm-passthru
Date: Fri, 16 Mar 2018 14:56:09 +0530 [thread overview]
Message-ID: <124034c6-a0af-0142-0d04-7d8bbc19bb82@codeaurora.org> (raw)
In-Reply-To: <20180316025659.217423-2-amstan@chromium.org>
On Friday 16 March 2018 08:26 AM, Alexandru M Stan wrote:
> Documentation for the optional backlight-pwm-passthru property.
> Tells the EDP panel to folow the input pwm frequency instead
s/folow/follow
It would be nice if we could add the details you mentioned in
patch #0 in either this or the next patch.
> of generating its own.
This is one of those bindings which is more a knob than a HW property,
but I can't think of any easy way to figure this out in SW. So, I guess
it's okay to have.
One thing I was wondering about was whether this prop should belong to
the eDP controller or the eDP panel. I don't have any strong opinion
about it, though.
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Thanks,
Archit
>
> Signed-off-by: Alexandru M Stan <amstan@chromium.org>
> ---
>
> Documentation/devicetree/bindings/display/bridge/analogix_dp.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> index 0c7473dd0e51..3c15242f6ce3 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> @@ -23,6 +23,10 @@ Required properties for dp-controller:
> from general PHY binding: Should be "dp".
>
> Optional properties for dp-controller:
> + -backlight-pwm-passthru:
> + Directly pass the PWM frequency applied to the BL_PWM_DIM
> + pin to the backlight current source. Done via
> + EDP_BACKLIGHT_MODE_SET_REGISTER on DPCD.
> -force-hpd:
> Indicate driver need force hpd when hpd detect failed, this
> is used for some eDP screen which don't have hpd signal.
>
next prev parent reply other threads:[~2018-03-16 9:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-16 2:56 [PATCH 0/2] Add backlight-pwm-passthru in analogix DP driver Alexandru M Stan
2018-03-16 2:56 ` [PATCH 1/2] dt-bindings: analogix-dp: Add backlight-pwm-passthru Alexandru M Stan
2018-03-16 9:26 ` Archit Taneja [this message]
2018-03-18 12:52 ` Rob Herring
2018-03-20 14:07 ` Laurent Pinchart
2018-03-16 2:56 ` [PATCH 2/2] drm/bridge: analogix: Enable EDP_BACKLIGHT_FREQ_PWM_PIN_PASSTHRU Alexandru M Stan
2018-03-16 8:36 ` Daniel Vetter
2018-03-16 16:50 ` [PATCH 0/2] Add backlight-pwm-passthru in analogix DP driver Sean Paul
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