Dear Aleksandr,
We use the raydium68200 ic driver in a dsi 720p 2dl panel module mounted on the
MB1230 board [1], mounted on the STM32MP157 eval board [2].
According to your email, you are using the EDT ETML0500F3DHA panel module,
probably composed of a raydium68200+a touchscreen+a glass+backlight+....
Could you please double check if your panel module has the same characteristics
as the one described in panel-raydium68200.c (pixel clock, blanking values,
resolutions, number of dsi data lanes, enable & reset gpios, backlight...).
Moreover, maybe your panel embeds a non-volatile ram which contains nice
default values ("fused" during production) allowing to reduce a lot the panel
init sequence... allowing then to use panel-simple.c instead of
panel-raydium68200.c (that could explain why you can see "colors" without
sending any init sequence).
The issues you encountered may come from (starting with the highest
probability):
* bad lcd hw vs sw configuration (see description above).
* bad pixel clock frequency, bad blanking values...
* bad dsi internal Rockchip ip programming (pll and clock trees in dt...)
Hope it helps,
[1] https://wiki.st.com/stm32mpu/wiki/MB1230
[2] https://www.st.com/en/evaluation-tools/stm32mp157a-ev1.html
Philippe :-)
-----Original Message-----
From: aleksandr.o.maka...@gmail.com <aleksandr.o.maka...@gmail.com>
Sent: Saturday, January 16, 2021 12:40
To: Andrzej Hajda <a.ha...@samsung.com>; Neil Armstrong
<narmstr...@baylibre.com>; Laurent Pinchart
<laurent.pinch...@ideasonboard.com>; Jonas Karlman <jo...@kwiboo.se>; Jernej
Skrabec <jernej.skra...@siol.net>; David Airlie <airl...@linux.ie>; Daniel
Vetter <dan...@ffwll.ch>; Sam Ravnborg <s...@ravnborg.org>; Philippe CORNU
<philippe.co...@st.com>; Antonio BORNEO <antonio.bor...@st.com>;
<dri-de...@lists.freedesktop.org> <linux-kernel@vger.kernel.org>
Subject: drm: panel: panel-raydium68200 driver fails to write MIPI DSI init
commands
I need to bring up my MIPI DSI 1280x720 EDT ETML0500F3DHA panel on a
RockPro64 V2.1 board.
There is no completely suitable in-tree driver for that panel yet, but for the
purpose of reproducing the issue that I face, the
gpu/drm/panel/panel-raydium-rm68200.c can do just fine.
To reproduce:
- Get the same Linux 5.9.14 as on my RockPro64 board (with Armbian
20.11.6 on it)
- Patch the rk3399-rockpro64.dts to add a panel node that is compatible with
"raydium,rm68200" driver on MIPI interface (rockpro64- rm68200.patch attached)
- Compile and put the resulting rk3399-rockpro64.dtb on the target system. The
panel driver shall then get probed at next boot.
The kernel log shall contain following errors:
[ 10.139957] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.139988] [drm:rm68200_dcs_write_cmd.isra.4
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write failed: -110
[ 10.160972] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.161000] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.181929] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.181953] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.202923] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.202947] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.223064] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.223094] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.226104] zram1: detected capacity change from 0 to 52428800
[ 10.244027] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.244073] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.265024] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.265064] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.285711] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.285746] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.305926] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.305955] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.326996] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.327039] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
[ 10.348030] dw-mipi-dsi-rockchip ff960000.mipi: failed to write
command FIFO
[ 10.348074] [drm:rm68200_dcs_write_buf.isra.5
[panel_raydium_rm68200]] *ERROR* MIPI DSI DCS write buffer failed: -110
It's remarkable that if to pull the module panel-rm682000 out and then back in,
there are no errors mentioned. I can for sure say that those commands become
effective - I start seeing colourful stripes on the display after. That is, if
I would send the correct command set to the panel, then it would bring up just
fine. the panel, then it would bring up just fine.
