On Sat, Dec 12, 2020 at 3:33 AM Sergio Sota <pikasl...@gmail.com> wrote:
>
> Hi Clement,
>
> yes, tve0 is only for VGA/CVBS video output (which we don't use right now)
> But just in case we have enabled this controller and the result is the same.
>
> You're probably right about the I2C port (as the binding suggest) The thing is
> we are using the olimex olinuxino tft lcd 10.1" panel, and as the binding file
> states there should be an I2C bus connection (besides the RGB, hsync, vsync,
> de, clk, backlight, etc) This I2C bus should connect to an internal eeprom
> that
> contains the timing requirements (then the driver knows what kind of panel is
> attached and selects between 4.3/7/10.1 inches olimex panels) But then on
> the physical boards there is no I2C bus connecting the panel... (check the
> schematics) besides in the future we intend to use other tft lcd 10.1" panels.
>
> Olimex A13SOM board schematic:
> https://github.com/OLIMEX/SOM/blob/master/A13/A13-SOM/A13-SOM512_Rev_G.pdf
>
> Olimex Olinuxino-micro board schematic (with an A13 similar as A13SOM)
> https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/A13-OLinuXino-MICRO/1.%20Latest%20hardware%20revision/A13-OLinuXino-MICRO%20hardware%20revision%20B1/A13-OLinuXino-MICRO_Rev_B1.pdf
>
> Olimex Olinuxino 10.1" tft lcd board schematic
> https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/LCDs/LCD-OLinuXino-10TS/Hardware%20revision%20C1/LCD-OLINUXINO-10''TS_Rev_C.pdf
>
> that's why we set the timing in the device tree. So, may be what we should do
> is remove the panel from the compatible line and use it only as a generic one:
>
> +compatible = "simple-panel";
> -compatible = "olimex,lcd-olinuxino", "simple-panel";
>
> Anyway, we will check both posibilities (defining the panel on a I2C bus and
> in the root but only as a generic panel) Thanks again for your invaluable
> help :-D
If you want to specify display timings in the device tree, you should be
using the "panel-dpi" compatible, as specified in the panel-dpi binding:
Documentation/devicetree/bindings/display/panel/panel-dpi.yaml
Also, when asking for help, please always include full kernel logs. Others
do not know what is happening on your system and can only guess if you
do not provide logs.
ChenYu
> Best Regards,
> Sergio Sota
>
> El viernes, 11 de diciembre de 2020 a las 19:56:16 UTC+1, peron...@gmail.com
> escribió:
>>
>> Hi Sergio,
>>
>> Sorry looks like the tve0 is only required for composite / VGA output.
>>
>> Which LCD Panel do you use ?
>>
>> Looks like the bindings you are using should be declared on a I2C bus.
>> https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/display/panel/olimex,lcd-olinuxino.yaml
>>
>> So the drivers will read the configuration from the I2C eeprom
>> Also check that CONFIG_DRM_PANEL_OLIMEX_LCD_OLINUXINO is enabled.
>>
>> Regards,
>> Clement
>>
>> On Fri, 11 Dec 2020 at 17:37, Clément Péron <peron...@gmail.com> wrote:
>> >
>> > Hi Sergio,
>> >
>> > Maybe you missed enabling tve0 ?
>> >
>> > https://elixir.bootlin.com/linux/v5.9.13/source/arch/arm/boot/dts/sun5i.dtsi#L244
>> >
>> > Also could you send the bootlog is this doesn't fix your issue.
>> >
>> > Clement
>> >
>> > On Fri, 11 Dec 2020 at 17:13, Sergio Sota <pika...@gmail.com> wrote:
>> > >
>> > > Hi Clement,
>> > >
>> > > this week we have had no luck with Allwinner A13 video decoding, here you
>> > > can find my device tree. We have added panel description (before we used
>> > > an uboot configuration) front-end, back-end and tcon. Also on linux
>> > > mainline
>> > > kernel (5.9.11) we have selected DRM_SUN4I and DRM_SUN4I_BACKEND,
>> > > but seems to be no DRM plane support on our system (no sun4i-drm kernel
>> > > messages and no /dev/dri/card0 device)
>> > >
>> > > Also with VLC player we have selected in the menu the configuration
>> > > options:
>> > > VA-API video decoder and X11 video output (XCB) but no video decoding.
>> > > With MPV player instead we can see some video frames, but it seems to be
>> > > trying to decode via software, so it is almost like static pictures.
>> > >
>> > > Best Regards,
>> > > Sergio Sota
>> > >
>> > > This device tree is based on mainline kernel
>> > > sun5i-a13-olinuxino-micro.dts
>> > >
>> > > #######################################################
>> > > ################## DEVICE TREE START #####################
>> > > #######################################################
>> > >
>> > >
>> > > /*
>> > > * Copyright 2012 Maxime Ripard <maxime...@free-electrons.com>
>> > > * Copyright 2013 Hans de Goede <hdeg...@redhat.com>
>> > > *
>> > > * This file is dual-licensed: you can use it either under the terms
>> > > * of the GPL or the X11 license, at your option. Note that this dual
>> > > * licensing only applies to this file, and not this project as a
>> > > * whole.
>> > > *
>> > > * a) This file is free software; you can redistribute it and/or
>> > > * modify it under the terms of the GNU General Public License as
>> > > * published by the Free Software Foundation; either version 2 of the
>> > > * License, or (at your option) any later version.
>> > > *
>> > > * This file is distributed in the hope that it will be useful,
>> > > * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> > > * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> > > * GNU General Public License for more details.
>> > > *
>> > > * Or, alternatively,
>> > > *
>> > > * b) Permission is hereby granted, free of charge, to any person
>> > > * obtaining a copy of this software and associated documentation
>> > > * files (the "Software"), to deal in the Software without
>> > > * restriction, including without limitation the rights to use,
>> > > * copy, modify, merge, publish, distribute, sublicense, and/or
>> > > * sell copies of the Software, and to permit persons to whom the
>> > > * Software is furnished to do so, subject to the following
>> > > * conditions:
>> > > *
>> > > * The above copyright notice and this permission notice shall be
>> > > * included in all copies or substantial portions of the Software.
>> > > *
>> > > * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>> > > * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
>> > > * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
>> > > * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
>> > > * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
>> > > * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
>> > > * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
>> > > * OTHER DEALINGS IN THE SOFTWARE.
>> > > */
>> > >
>> > > /dts-v1/;
>> > > #include "sun5i-a13.dtsi"
>> > > #include "sunxi-common-regulators.dtsi"
>> > > #include <dt-bindings/gpio/gpio.h>
>> > > #include <dt-bindings/pwm/pwm.h>
>> > > #include <dt-bindings/interrupt-controller/irq.h>
>> > >
>> > > / {
>> > > model = "Olimex A13-Olinuxino Micro";
>> > > compatible = "olimex,a13-olinuxino-micro", "allwinner,sun5i-a13";
>> > >
>> > > aliases {
>> > > serial0 = &uart1;
>> > > };
>> > >
>> > > chosen {
>> > > stdout-path = "serial0:115200n8";
>> > > };
>> > >
>> > > leds {
>> > > compatible = "gpio-leds";
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&led_pins_olinuxinom>;
>> > >
>> > > power {
>> > > label = "a13-olinuxino-micro:green:power";
>> > > gpios = <&pio 6 9 GPIO_ACTIVE_HIGH>; /* PG9 */
>> > > default-state = "on";
>> > > };
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * clock spi0 mcp2515 (spi can controller)
>> > > *****************************************************************************/
>> > > clocks {
>> > > #address-cells = <1>;
>> > > #size-cells = <1>;
>> > > can0_osc_fixed: can0_osc_fixed {
>> > > compatible = "fixed-clock";
>> > > #clock-cells = <0>;
>> > > clock-frequency = <10000000>;
>> > > };
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * panel backlight
>> > > *****************************************************************************/
>> > > backlight: backlight {
>> > > compatible = "pwm-backlight";
>> > > pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
>> > > brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
>> > > default-brightness-level = <8>;
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * panel tft lcd 10.1" (rgb interface)
>> > > *****************************************************************************/
>> > > panel {
>> > > compatible = "olimex,lcd-olinuxino", "simple-panel";
>> > > power-supply = <®_vcc3v3>;
>> > > enable-gpios = <&pio 1 10 GPIO_ACTIVE_HIGH>; /* PB10 */
>> > > backlight = <&backlight>;
>> > > status = "okay";
>> > >
>> > > display-timings {
>> > > timing0 {
>> > > clock-frequency = <45000000>;
>> > > hactive = <1024>;
>> > > vactive = <600>;
>> > > hfront-porch = <16>;
>> > > hback-porch = <150>;
>> > > hsync-len = <10>;
>> > > vback-porch = <2>;
>> > > vfront-porch = <21>;
>> > > vsync-len = <2>;
>> > > hsync-active = <0>;
>> > > vsync-active = <0>;
>> > > de-active = <1>;
>> > > pixelclk-active = <1>;
>> > > };
>> > > };
>> > >
>> > > port {
>> > > #address-cells = <1>;
>> > > #size-cells = <0>;
>> > >
>> > > panel_input: endpoint {
>> > > remote-endpoint = <&tcon0_out_lcd>;
>> > > };
>> > > };
>> > > };
>> > > };
>> > >
>> > > &ehci0 {
>> > > status = "okay";
>> > > };
>> > >
>> > > &i2c0 {
>> > > status = "okay";
>> > > };
>> > >
>> > > &i2c1 {
>> > > status = "okay";
>> > > };
>> > >
>> > > &i2c2 {
>> > > status = "okay";
>> > > };
>> > >
>> > > &mmc0 {
>> > > vmmc-supply = <®_vcc3v3>;
>> > > bus-width = <4>;
>> > > cd-gpios = <&pio 6 0 GPIO_ACTIVE_LOW>; /* PG0 */
>> > > status = "okay";
>> > > };
>> > >
>> > > &ohci0 {
>> > > status = "okay";
>> > > };
>> > >
>> > > &otg_sram {
>> > > status = "okay";
>> > > };
>> > >
>> > > ®_usb0_vbus {
>> > > gpio = <&pio 6 12 GPIO_ACTIVE_HIGH>; /* PG12 */
>> > > status = "okay";
>> > > };
>> > >
>> > > ®_usb1_vbus {
>> > > gpio = <&pio 6 11 GPIO_ACTIVE_HIGH>; /* PG11 */
>> > > status = "okay";
>> > > };
>> > >
>> > > &uart1 {
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&uart1_pg_pins>;
>> > > status = "okay";
>> > > };
>> > >
>> > > &usb_otg {
>> > > dr_mode = "otg";
>> > > status = "okay";
>> > > };
>> > >
>> > > &usbphy {
>> > > usb0_id_det-gpios = <&pio 6 2 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>; /* PG2
>> > > */
>> > > usb0_vbus_det-gpios = <&pio 6 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /*
>> > > PG1 */
>> > > usb0_vbus-supply = <®_usb0_vbus>;
>> > > usb1_vbus-supply = <®_usb1_vbus>;
>> > > status = "okay";
>> > > };
>> > >
>> > > &pio {
>> > > led_pins_olinuxinom: led-pin {
>> > > pins = "PG9";
>> > > function = "gpio_out";
>> > > drive-strength = <20>;
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * spi0 pins
>> > > *****************************************************************************/
>> > > spi0_pins: spi0_pins {
>> > > pins = "PC0", "PC1", "PC2";
>> > > function = "spi0";
>> > > };
>> > >
>> > > spi0_cs0_pin: spi0_cs_pin {
>> > > pins = "PC3";
>> > > function = "spi0";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * spi2 ethernet controller (enc28j60) pins
>> > > *****************************************************************************/
>> > > eth0_irq_pin: eth0_irq_pin {
>> > > pins = "PB3";
>> > > function = "irq";
>> > > bias-pull-up;
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * spi2 pins
>> > > *****************************************************************************/
>> > > spi2_pins: spi2_pins {
>> > > pins = "PE1", "PE2", "PE3";
>> > > function = "spi2";
>> > > };
>> > >
>> > > spi2_cs0_pin: spi2_cs0_pin {
>> > > pins = "PE0";
>> > > function = "spi2";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * spi0 can controller (mcp2515) pins
>> > > *****************************************************************************/
>> > > can0_irq_pin: can0_irq_pin {
>> > > pins = "PB4";
>> > > function = "irq";
>> > > bias-pull-up;
>> > > };
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * spi0 (mcp2515 spi can controller)
>> > > *****************************************************************************/
>> > > &spi0 {
>> > > #address-cells = <1>;
>> > > #size-cells = <0>;
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>;
>> > > status = "okay";
>> > >
>> > > mcp2515@0 {
>> > > compatible = "microchip,mcp2515";
>> > > reg = <0>;
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&can0_irq_pin>;
>> > > interrupt-parent = <&pio>;
>> > > interrupts = <1 4 2>; /* PB4 IRQ_TYPE_EDGE_FALLING */
>> > > clocks = <&can0_osc_fixed>;
>> > > spi-max-frequency = <10000000>;
>> > > status = "okay";
>> > > };
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * spi2 (enc28j60 spi ethernet controller)
>> > > *****************************************************************************/
>> > > &spi2 {
>> > > #address-cells = <1>;
>> > > #size-cells = <0>;
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&spi2_pins>, <&spi2_cs0_pin>;
>> > > status = "okay";
>> > >
>> > > enc28j60@0 {
>> > > compatible = "microchip,enc28j60";
>> > > /* compatible = "microchip,encx24j600"; */
>> > > reg = <0>;
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <ð0_irq_pin>;
>> > > interrupt-parent = <&pio>;
>> > > interrupts = <1 3 2>; /* PB3 IRQ_TYPE_EDGE_FALLING */
>> > > spi-max-frequency = <12000000>;
>> > > status = "okay";
>> > > };
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * codec audio controller (headphones)
>> > > *****************************************************************************/
>> > > &codec {
>> > > status = "okay";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * crypto engine (sha, md5, rng)
>> > > *****************************************************************************/
>> > > &crypto {
>> > > status = "okay";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * front end (display engine)
>> > > *****************************************************************************/
>> > > &fe0 {
>> > > status = "okay";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * back end (display engine)
>> > > *****************************************************************************/
>> > > &be0 {
>> > > status = "okay";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * pipeline (display engine)
>> > > *****************************************************************************/
>> > > &tcon0 {
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&lcd_rgb666_pins>;
>> > > status = "okay";
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * timing controller (panel tft lcd 10.1")
>> > > *****************************************************************************/
>> > > &tcon0_out {
>> > > tcon0_out_lcd: endpoint@0 {
>> > > reg = <0>;
>> > > remote-endpoint = <&panel_input>;
>> > > };
>> > > };
>> > >
>> > > /*****************************************************************************
>> > > * pwm controller
>> > > *****************************************************************************/
>> > > &pwm {
>> > > pinctrl-names = "default";
>> > > pinctrl-0 = <&pwm0_pin>;
>> > > status = "okay";
>> > > };
>> > >
>> > >
>> > > #######################################################
>> > > ################### DEVICE TREE END ######################
>> > > #######################################################
>> > >
>> > > El domingo, 6 de diciembre de 2020 a las 19:02:09 UTC+1,
>> > > peron...@gmail.com escribió:
>> > >>
>> > >> Hi Sergio,
>> > >>
>> > >> On Fri, 4 Dec 2020 at 13:31, Sergio Sota <pika...@gmail.com> wrote:
>> > >> >
>> > >> > Dear all,
>> > >> >
>> > >> > I'm building a linux system for the Olimex A13SOM module. This little
>> > >> > module comes
>> > >> > with the Allwinner A13 SOC. In the past we have been using other
>> > >> > modules with the
>> > >> > Allwinner A20 SOC and the old sunxi-linux kernel in order to have
>> > >> > support for all
>> > >> > the SOC peripherals (as the Video Engine decoder, Mali GPU, etc)
>> > >> >
>> > >> > This time we would like to use a mainline kernel, taking into account
>> > >> > that by now
>> > >> > almost all peripherals are supported in mainline. We have had luck
>> > >> > tunning device
>> > >> > tree (as we were used to use .fex files) and by now we can have
>> > >> > Ethernet over SPI,
>> > >> > Can interface over SPI, ALSA audio output, LCD RGB video output,
>> > >> > Cryto engine to
>> > >> > generate fast entropy, OpenGL ES support (thanks to LIMA driver and
>> > >> > Mesa3d libs)
>> > >> > and so on... but we would like also to have video decoding support.
>> > >> >
>> > >> > We have turned on the frontend, backend, video engine in the device
>> > >> > tree, build
>> > >> > the kernel with Cedrus V4L M2M driver, libva_vl42_request and
>> > >> > v4l2_request_test.
>> > >> > (and also set the CMA memory allocation, environment variables, etc)
>> > >> >
>> > >> > Using vainfo everything is ok, the linux driver-libva request part
>> > >> > works, but then
>> > >> > we check with v4l2_request_test utility and it fails as there is no
>> > >> > DRM support on
>> > >> > our system. We have on the system /dev/video0 and /dev/media0 but no
>> > >> > /dev/dri/card0
>> > >> > device (in fact we selected the linux sun4i-drm driver but no message
>> > >> > appers on the
>> > >> > boot sequence regarding this, even when build as module it happens
>> > >> > nothing...)
>> > >> >
>> > >> > We have checked the Cedrus driver information and appears to be no
>> > >> > support for the
>> > >> > DRM plane in A13 SOC (broken/missing) and as I understand that means
>> > >> > that part of
>> > >> > the picture composing work should be done by software (and that's not
>> > >> > reliable)
>> > >> >
>> > >> > My question is: is there DRM plane support for A13 SOC? (as time goes
>> > >> > on I checked
>> > >> > there has been work done in the mainline kernel and fixes made) Then,
>> > >> > in case of no
>> > >> > support, are there plans to add this support in the future? and
>> > >> > finally, could we
>> > >> > play video files without this DRM support? by what means?
>> > >>
>> > >> Sorry I can't help you a lot on this.
>> > >> I don't know if the wiki is up to date for this.
>> > >> But note that A13 is similar to R8 => C.H.I.P Computer.
>> > >> All stuff you found on R8 will be the same for A13.
>> > >>
>> > >> Have a look at the R8 CHIP device-tree.
>> > >> https://elixir.bootlin.com/linux/latest/source/arch/arm/boot/dts/sun5i-r8-chip.dts
>> > >>
>> > >> And check that you have a correct TCON description in your dt.
>> > >> If you can, post your device-tree.
>> > >> And don't forget to reply if you make it works :)
>> > >>
>> > >> Regards,
>> > >> Clement
>> > >>
>> > >>
>> > >> >
>> > >> > Thanks in advance for your help and your time, your team have made a
>> > >> > wonderful
>> > >> > work. I also apologize for my poor English, and for writing this
>> > >> > email as maybe this is
>> > >> > not the proper way to issue this questions, but didn't know other way
>> > >> >
>> > >> > Best Regards,
>> > >> > Sergio Sota
>> > >> >
>> > >> > --
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