[Letux-kernel] DSI & DPI panels with omapdrm on 4.20-rc

Andreas Kemnade andreas at kemnade.info
Wed Nov 14 12:19:17 CET 2018


Hi,

On Wed, 14 Nov 2018 11:42:56 +0100
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:

> Hi Tomi,
> I now also have a problem with a DPI panel on an OMAP3.
> 
There used to be  some graphs inconsistency warnings during dtb compile,
so maybe they are just now start to harm? So the panel-tpo-td028ttec1
is somehow not completely overwritten.
I will probably test dpi this evening.

Regards,
Andreas

> Here is the DT definition which works up to 4.19.1:
> 
> 	aliases {
> 		display0 = &lcd_b2;
> 		display1 = &tv0;
> 	};
> 
> 	lcd_b2: lcd {
> 		compatible =	"ortustech,com37h3m05dtc",
> 				"ortustech,com37h3m099dtc",
> 				"panel-dpi";
> 		label = "lcd";
> 		enable-gpios = <&gpio1 20 0>;
> 
> 		panel-timing {
> 			clock-frequency = <22153000>;
> 
> 			hback-porch = <10>;
> 			hactive = <480>;
> 			hfront-porch = <8>;
> 			hsync-len = <10>;
> 
> 			vback-porch = <4>;
> 			vactive = <640>;
> 			vfront-porch = <4>;
> 			vsync-len = <3>;
> 
> 			hsync-active = <0>;
> 			vsync-active = <0>;
> 			de-active = <1>;
> 			pixelclk-active = <1>;
> 
> 		};
> 
> 		port {
> 			lcd_b2_in: endpoint {
> 				remote-endpoint = <&dpi_out>;
> 			};
> 		};
> 	};
> 
> &dss {
> 	pinctrl-names = "default";
> 	pinctrl-0 = < &dss_dpi_pins >;
> 
> 	status = "okay";
> 
> 	port {
> 		dpi_out: endpoint {
> 			remote-endpoint = <&lcd_b2_in>;
> 			data-lines = <24>;
> 		};
> 	};
> };
> 
> 
> The Panel basically works but the picture repeats the first column in all
> columns of the left half of the screen.
> 
> The only panel we currently have working with 4.20-rc2 is the GTA04 with
> driver panel-tpo-td028ttec1.
> 
> BR and thanks for suggestions how to fix things,
> Nikolaus
> 
> 
> > Am 13.11.2018 um 15:09 schrieb Tomi Valkeinen <tomi.valkeinen at ti.com>:
> > 
> > On 12/11/18 23:43, H. Nikolaus Schaller wrote:
> >   
> >> The Pyra is planned to become a mainline user of omapdrm.dsi, but as  
> > 
> > Is pyra still using/going to use videomode dsi display (not command mode)?
> > 
> > Tomi
> > 
> > -- 
> > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> > Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki  
> 
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