linux-kernel - Re: [PATCH v1] drm/panel: simple: add SGD GKTW70SDAD1SD

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Message-ID: <CAOMZO5DKann0ojZrhjyXOqrRq9owtgrrZTGwttD_bU0-KO=aBg@mail.gmail.com>
Date:   Sat, 16 Jan 2021 10:44:30 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Oliver Graute <oliver.graute@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Marco Felsch <m.felsch@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        DRI mailing list <dri-devel@...ts.freedesktop.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] drm/panel: simple: add SGD GKTW70SDAD1SD

On Sat, Jan 16, 2021 at 9:49 AM Oliver Graute <oliver.graute@...il.com> wrote:

> > power-supply = <&reg_touch_3v3> is not correct, as the reg_touch_3v3
> > does not power the LCD.
>
> yes, but how is the LCD correctly powered then?

J4 is powered by VCC_5V and VCC_3V#.

> [    7.795980] pwm-backlight backlight: supply power not found, using dummy regulator
> [    7.804436] OF: /backlight: #pwm-cells = 3 found -1
> [    7.806563] of_pwm_get(): can't parse "pwms" property
> [    7.812026] pwm-backlight backlight: unable to request PWM
> [    7.822929] pwm-backlight: probe of backlight failed with error -22

You need to fix this.

> [    7.876831] imx-sdma 20ec000.sdma: Direct firmware load for imx/sdma/sdma-imx6q.bin failed with error -2
> [    7.884231] imx-sdma 20ec000.sdma: Falling back to sysfs fallback for: imx/sdma/sdma-imx6q.bin
> [    7.916013] printk: console [ttymxc0] enabled
> [    7.916013] printk: console [ttymxc0] enabled
> [    7.922351] printk: bootconsole [ec_imx6q0] disabled
> [    7.922351] printk: bootconsole [ec_imx6q0] disabled
> [    7.952397] 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 68, base_baud = 5000000) is a IMX
> [    7.970794] 21ec000.serial: ttymxc2 at MMIO 0x21ec000 (irq = 69, base_baud = 5000000) is a IMX
> [    8.033015] ------------[ cut here ]------------
> [    8.037826] WARNING: CPU: 0 PID: 1 at ../drivers/gpu/drm/panel/panel-simple.c:577 panel_simple_probe+0x5dc/0x6b8

And this too

> [    8.846104] imx6ul-pinctrl 20e0000.pinctrl: pin MX6UL_PAD_NAND_CE0_B already requested by regulator-gpio; cannot claim for 1806000.nand-controller
> [    8.859641] imx6ul-pinctrl 20e0000.pinctrl: pin-107 (1806000.nand-controller) status -22
> [    8.867851] imx6ul-pinctrl 20e0000.pinctrl: could not request pin 107 (MX6UL_PAD_NAND_CE0_B) from group gpminandgrp  on device 20e0000.pinctrl
> [    8.880930] gpmi-nand 1806000.nand-controller: Error applying setting, reverse things back
> [    8.889726] gpmi-nand: probe of 1806000.nand-controller failed with error -22

And this pin conflict too.