linux-kernel - Re: [PATCH v2] display: panel: Add Tianma tm070rvhg71 display support (800x480)

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Message-ID: <20171117131420.7cd8b6b2@jawa>
Date:   Fri, 17 Nov 2017 13:14:20 +0100
From:   Lukasz Majewski <lukma@...x.de>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     Rob Herring <robh@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] display: panel: Add Tianma tm070rvhg71 display
 support (800x480)

Hi Thierry,

> On Tue, Nov 07, 2017 at 04:30:58PM +0100, Lukasz Majewski wrote:
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > 
> > ---
> > Changes for v2:
> > - Provide more
> > detailed ./Documentation/devicetree/bindings/display/panel entry to
> > describe this panel device. ---
> >  .../bindings/display/panel/tianma,tm070rvhg71.txt  | 29
> > ++++++++++++++++++++++
> > drivers/gpu/drm/panel/panel-simple.c               | 27
> > ++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode
> > 100644
> > Documentation/devicetree/bindings/display/panel/tianma,tm070rvhg71.txt  
> 
> I've applied this, though I had to make a few modifications. 

Thanks :-)

> First, I
> added a commit message. Commits should always have one.
> 
> Also, please send DT bindings and driver changes as separate patches
> in the future.
> 
> Device tree bindings should have a subject prefixed with any of these:
> 
> 	dt-bindings:
> 	dt-bindings: display:
> 	dt-bindings: display: panel:
> 
> Though the latter two are fairly long by themselves, so you don't
> have a lot of room for the important bits.
> 
> Please also prefix the subject of panel driver patches with a:
> 
> 	drm/panel:
> 
> Which makes it easier to identify relevant patches among loads and
> loads of other email.

Ok. I see. Thanks for explanation.

> 
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/display/panel/tianma,tm070rvhg71.txt
> > b/Documentation/devicetree/bindings/display/panel/tianma,tm070rvhg71.txt
> > new file mode 100644 index 000000000000..02562867444d --- /dev/null
> > +++
> > b/Documentation/devicetree/bindings/display/panel/tianma,tm070rvhg71.txt
> > @@ -0,0 +1,29 @@ +Tianma Micro-electronics TM070RVHG71 7.0" WXGA
> > TFT LCD panel +
> > +Required properties:
> > +- compatible: should be "tianma,tm070rvhg71  
> 
> Added a missing " at the end here.

Ok.

> 
> > +- power-supply: single regulator to provide the supply voltage
> > +- backlight: phandle of the backlight device attached to the panel
> > +
> > +Required nodes:
> > +- port: LVDS port mapping to connect this display
> > +
> > +This panel needs single power supply voltage. Its backlight is
> > conntrolled +via PWM signal.
> > +
> > +Example:
> > +--------
> > +
> > +Example device-tree definition when connected to iMX6Q based board
> > +
> > +	panel: panel-lvds0 {
> > +		compatible = "tianma,tm070rvhg71";
> > +		backlight = <&backlight_lvds>;
> > +		power-supply = <&reg_lvds>;
> > +
> > +		port {
> > +			panel_in_lvds0: endpoint {
> > +				remote-endpoint = <&lvds0_out>;
> > +			};
> > +		};
> > +	};
> > diff --git a/drivers/gpu/drm/panel/panel-simple.c
> > b/drivers/gpu/drm/panel/panel-simple.c index
> > 3d2cb8bc4d94..07188dc084df 100644 ---
> > a/drivers/gpu/drm/panel/panel-simple.c +++
> > b/drivers/gpu/drm/panel/panel-simple.c @@ -1831,6 +1831,30 @@
> > static const struct panel_desc tianma_tm070jdhg30 = { .bus_format =
> > MEDIA_BUS_FMT_RGB666_1X7X3_SPWG, };
> >  
> > +static const struct display_timing tianma_tm070rvhg71_timing = {
> > +	.pixelclock = { 27700000, 29200000, 39600000 },
> > +	.hactive = { 800, 800, 800 },
> > +	.hfront_porch = { 12, 40, 212 },
> > +	.hback_porch = { 88, 88, 88 },
> > +	.hsync_len = { 1, 1, 40 },
> > +	.vactive = { 480, 480, 480 },
> > +	.vfront_porch = { 1, 13, 88 },
> > +	.vback_porch = { 32, 32, 32 },
> > +	.vsync_len = { 1, 1, 3 },
> > +	.flags = DISPLAY_FLAGS_DE_HIGH,
> > +};
> > +
> > +static const struct panel_desc tianma_tm070rvhg71 = {
> > +	.timings = &tianma_tm070rvhg71_timing,
> > +	.num_timings = 1,
> > +	.bpc = 8,
> > +	.size = {
> > +		.width = 154,
> > +		.height = 86,
> > +	},
> > +	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
> > +};
> > +
> >  static const struct drm_display_mode tpk_f07a_0102_mode = {
> >  	.clock = 33260,
> >  	.hdisplay = 800,
> > @@ -2113,6 +2137,9 @@ static const struct of_device_id
> > platform_of_match[] = { .compatible = "tianma,tm070jdhg30",
> >  		.data = &tianma_tm070jdhg30,
> >  	}, {
> > +		.compatible = "tianma,tm070rvhg71",
> > +		.data = &tianma_tm070rvhg71,
> > +	}, {
> >  		.compatible = "tpk,f07a-0102",
> >  		.data = &tpk_f07a_0102,
> >  	}, {  
> 
> Looks like these are actually sorted correctly in your patch. However,
> when applying these got added after the Toshiba panel that was
> recently added, so I resorted again.

Thanks one more time.

> 
> Thierry



Best regards,

Lukasz Majewski

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