linux-kernel - Re: [PATCH 2/2] drm/dsi: Implement dcs backlight brightness

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Date:	Mon, 06 Jun 2016 21:04:36 +0300
From:	Jani Nikula <jani.nikula@...ux.intel.com>
To:	Vinay Simha <simhavcs@...il.com>
Cc:	open list <linux-kernel@...r.kernel.org>,
	"open list\:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
	Archit Taneja <archit.taneja@...il.com>,
	Rob Clark <robdclark@...il.com>,
	Thierry Reding <thierry.reding@...il.com>
Subject: Re: [PATCH 2/2] drm/dsi: Implement dcs backlight brightness

On Mon, 06 Jun 2016, Vinay Simha <simhavcs@...il.com> wrote:
> On Mon, Jun 6, 2016 at 1:07 PM, Jani Nikula <jani.nikula@...ux.intel.com> wrote:
>> On Thu, 02 Jun 2016, Vinay Simha BN <simhavcs@...il.com> wrote:
>>> Provide a small convenience wrapper that set/get the
>>> backlight brightness control and creates the backlight
>>> device for the panel interface
>>
>> To be pedantic, we should downplay "backlight" in the DSI DCS brightness
>> control... there need not be a backlight, at all, for brightness control
>> (see AMOLED).
> but this jdi display and few other dsi display can be controlled by
> dcs commands

The point I was trying to convey was that the DSI DCS interface is
agnostic to the actual method of controlling brightness. Whether the
panel has a backlight to control brightness is a panel implementation
detail. So maybe we shouldn't have "backlight" in the interface
nomenclature either.

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center