linux-kernel - Re: [PATCH 0/2] ARM: davinci: initial infrastructure for LCDC

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Date:   Wed, 5 Oct 2016 15:16:46 +0000
From:   Karl Beldan <karl.beldan@...il.com>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     Kevin Hilman <khilman@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Sekhar Nori <nsekhar@...com>, Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Russell King <linux@...linux.org.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        linux-drm <dri-devel@...ts.freedesktop.org>,
        linux-devicetree <devicetree@...r.kernel.org>,
        Jyri Sarha <jsarha@...com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        David Airlie <airlied@...ux.ie>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: Re: [PATCH 0/2] ARM: davinci: initial infrastructure for LCDC

On Wed, Oct 05, 2016 at 03:05:30PM +0200, Bartosz Golaszewski wrote:
> After discussing the matter with Laurent Pinchart it turned out that
> using ti,tilcdc,panel was wrong and we should go with the new
> simple-vga-dac driver proposed by Maxime Ripard and currently being
> reviewed.
> 
> The da850-lcdk board on which I'm working has a THS8135 video DAC for
> which the new driver seems to be best suited and we'll be able to
> query the connected display for supported modes instead of hardcoding
> them in the dt as is needed for the panel driver.
> 

I meant to point to these new changes but then it slipped my mind, it is
clearly the way to go.

Regards, 
Karl


> In the meantime I'm posting two patches based on Karl Beldan's
> previous work that can already be merged.
> 
> The first one adds OF_DEV_AUXDATA entry to da8xx-dt.c. I changed the
> compatible string to the new one we're introducing in the tilcdc
> driver.
> 
> The second adds the lcd pins and the display node to da850.dtsi. As
> suggested by Sekhar: I moved the pins node, which was previously in
> da850-lcdk.dts, to da850.dtsi. I also squashed Karl's two patches and
> removed the panel node.
> 
> Tested on a da850-lcdk with an LCD display connected over VGA with
> two patches already posted to the drm mailing list:
> 
>   drm: tilcdc: add a da850-specific compatible string
>   drm: tilcdc: add a workaround for failed clk_set_rate()
> 
> and some additional work-in-progress/hacks on top of that.
> 
> Karl Beldan (2):
>   ARM: davinci: da8xx-dt: add OF_DEV_AUXDATA entry for lcdc
>   ARM: dts: da850: add a node for the LCD controller
> 
>  arch/arm/boot/dts/da850.dtsi     | 29 +++++++++++++++++++++++++++++
>  arch/arm/mach-davinci/da8xx-dt.c |  1 +
>  2 files changed, 30 insertions(+)
> 
> -- 
> 2.9.3
>