Hi Can you list supported parallel(not lvds parallel bridge) displays for kernel version 5.10 Also if possible can you provide dts entry for parallel display
Hi anzal,
You can refer here (Example of Parallel(RGB) Panel on RZ/G2L (5.10))
Device Tree and Device Drivers - Renesas-wiki - Confluence
He hienhuynh can you list any displays you have used with the above dts entry???
My kernel version is 5.10.131
if run modetest modtest command is not foundi cant add the log here it seems websites say i have been blocked when adding logs here
panel simple driver i edited the giantplus driver code gpm940b0
here is the dts
Could you retry by using drm_display_mode instead of display_timing for panel definition.
You can refer this struct for your panel then retry.
static const struct drm_display_mode giantplus_gpg482739qs5_mode = { .clock = 9000, .hdisplay = 480, .hsync_start = 480 + 5, .hsync_end = 480 + 5 + 1, .htotal = 480 + 5 + 1 + 40, .vdisplay = 272, .vsync_start = 272 + 8, .vsync_end = 272 + 8 + 1, .vtotal = 272 + 8 + 1 + 8, }; static const struct panel_desc giantplus_gpg482739qs5 = { .modes = &giantplus_gpg482739qs5_mode, .num_modes = 1, .bpc = 8, .size = { .width = 95, .height = 54, }, .bus_format = MEDIA_BUS_FMT_RGB888_1X24, }
what about the hsync , vsync and de flags???
Please refer some similar panels info in panel-simple to fill the flags.
By the way, do you enable CONFIG_DRM_PANEL_SIMPLE in your defconfig?
i tried the method with the display mode
&lcdif { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_lcdif_dat &pinctrl_lcdif_ctrl>; display = <&display0>; status = "okay"; display0: display0 { bits-per-pixel = <16>; bus-width = <24>; display-timings { native-mode = <&timing0>; timing0: timing0 { clock-frequency = <9000000>; hactive = <480>; vactive = <272>; hfront-porch = <8>; hback-porch = <4>; hsync-len = <41>; vback-porch = <2>; vfront-porch = <4>; vsync-len = <10>; hsync-active = <0>; vsync-active = <0>; de-active = <1>; pixelclk-active = <0>; }; }; }; };
this is the working dts entry for this display in imx processor
static const struct drm_display_mode giantplus_gpg482739qs5_mode = { .clock = 9000, .hdisplay = 480, .hsync_start = 480 + 8, .hsync_end = 480 + 8 + 41, .htotal = 480 + 8 + 41 + 4, .vdisplay = 272, .vsync_start = 272 + 4, .vsync_end = 272 + 4 + 10, .vtotal = 272 + 4 + 10 + 2, .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, }; static const struct panel_desc giantplus_gpg482739qs5 = { .modes = &giantplus_gpg482739qs5_mode, .num_modes = 1, .bpc = 16, .size = { .width = 95, .height = 54, }, .bus_format = MEDIA_BUS_FMT_RGB888_1X24, .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE , };
This is the modification i made for display mode of giantplus can you just check and verify if the configuration is okay
i did enable the driver in defconfig
Describe display timings in devicetree when you use "compatible = "panel-simple"".
If you define the specific panel, you just need to describe with your code:
static const struct drm_display_mode giantplus_gpg482739qs5_mode = { .clock = 9000, .hdisplay = 480, .hsync_start = 480 + 8, .hsync_end = 480 + 8 + 41, .htotal = 480 + 8 + 41 + 4, .vdisplay = 272, .vsync_start = 272 + 4, .vsync_end = 272 + 4 + 10, .vtotal = 272 + 4 + 10 + 2, .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,};
static const struct panel_desc giantplus_gpg482739qs5 = { .modes = &giantplus_gpg482739qs5_mode, .num_modes = 1, .bpc = 16, .size = { .width = 95, .height = 54, }, .bus_format = MEDIA_BUS_FMT_RGB888_1X24, .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE ,};
By the way, for sure, you should add the debug in probing function of both panel-simple.c and rcar_du_drv.c to know what makes probing failure.
i did try adding timings in dts with panel-simple as compatible but doesnt seems to work i will try adding debug to driver code and check what is the issue
Maybe you can share your debug log here. By the way, does your rootfs have "modetest" command?
no modetest is not there
hello hienhuynh
i have added debugs in probe functions and it seems that its not even probing(panel_simple.c and rcar_du_drv.c ). Is there any config dependencies for simple panel i need to add to defconfig ???
Try adding #address-cells = <1>; and #size-cells = <0>; to your node. I have seen before that if they are missing, it does not work. The kernel documentation actually says they are required.
panel_rgb: panel-rgb { compatible = "giantplus,gpm940b0"; port { #address-cells = <1>; #size-cells = <0>; panel_in_rgb: endpoint { remote-endpoint = <&du_out_rgb>; }; }; };
anzal said:i have added debugs in probe functions and it seems that its not even probing(panel_simple.c and rcar_du_drv.c )
The only other suggestion is to boot the kernel with initcall_debug to see if the rcar_du and panel_simple drivers are being loaded on kernel boot.jira-gasg.renesas.eu/.../Linux Debug Tricks
hello chris i tried adding the following things but doesnt seems to work.
Chris said: #address-cells = <1>; and #size-cells = <0>;
OK, then add initcall_debug to the kernel command line to see if those drivers are really getting loaded or not.
I recheck RZ/V2L to support your panel and it can register the panel normally.
root@smarc-rzg2l:~# dmesg | grep drm [ 1.395664] [drm] Initialized rcar-du 1.0.0 20130110 for 10890000.display on minor 0 [ 1.403487] [drm] Device 10890000.display probed [ 1.476741] rcar-du 10890000.display: [drm] fb0: rcar-dudrmfb frame buffer device root@smarc-rzg2l:~# modetest -M rcar-du Encoders: id crtc type possible crtcs possible clones 38 37 none 0x00000001 0x00000001 44 0 Virtual 0x00000001 0x00000002 Connectors: id encoder status name size (mm) modes encoders 39 38 connected DPI-1 0x0 1 38 modes: index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot) #0 480x272 51.25 480 488 531 572 272 276 297 307 9000 flags: ; type: preferred, driver
I tested in v5.10.201-cip41. If you used old kernel version, please update to cip41 (3.0.6 BSP package).
Here is the diff that I support. Could you retry in your side?
Devicetree: RZ/V2L (disable adc due to pin conflict)
diff --git a/arch/arm64/boot/dts/renesas/r9a07g054l2-smarc.dts b/arch/arm64/boot/dts/renesas/r9a07g054l2-smarc.dts index 3857f9f0a67e..9e5b607756c2 100644 --- a/arch/arm64/boot/dts/renesas/r9a07g054l2-smarc.dts +++ b/arch/arm64/boot/dts/renesas/r9a07g054l2-smarc.dts @@ -59,4 +59,98 @@ isp_work0: SIMPLE_ISP { reg = <0x0 0xB4000000 0x0 0x03000000>; }; }; + + panel_rgb: panel-rgb { +// compatible = "giantplus,gpm940b0"; /* Used this compatible if the panel is supported in panel-simple */ + compatible = "panel-dpi"; + /* panel-timing is used for "panel-dpi" compatible */ + panel-timing { + clock-frequency = <9000000>; + hactive = <480>; + vactive = <272>; + hsync-len = <43>; + hfront-porch = <8>; + hback-porch = <41>; + vfront-porch = <4>; + vback-porch = <10>; + vsync-len = <21>; + }; + + port { + panel_in_rgb: endpoint { + remote-endpoint = <&du_out_rgb>; + }; + }; + + }; +}; + +&pinctrl { + du_pins: du { + data { + pinmux = <RZG2L_PORT_PINMUX(14, 1, 1)>, + <RZG2L_PORT_PINMUX(15, 0, 1)>, + <RZG2L_PORT_PINMUX(15, 1, 1)>, + <RZG2L_PORT_PINMUX(16, 0, 1)>, + <RZG2L_PORT_PINMUX(16, 1, 1)>, + <RZG2L_PORT_PINMUX(17, 0, 1)>, + <RZG2L_PORT_PINMUX(17, 1, 1)>, + <RZG2L_PORT_PINMUX(17, 2, 1)>, + <RZG2L_PORT_PINMUX(11, 0, 1)>, + <RZG2L_PORT_PINMUX(11, 1, 1)>, + <RZG2L_PORT_PINMUX(12, 0, 1)>, + <RZG2L_PORT_PINMUX(12, 1, 1)>, + <RZG2L_PORT_PINMUX(13, 0, 1)>, + <RZG2L_PORT_PINMUX(13, 1, 1)>, + <RZG2L_PORT_PINMUX(13, 2, 1)>, + <RZG2L_PORT_PINMUX(14, 0, 1)>, + <RZG2L_PORT_PINMUX(7, 2, 1)>, + <RZG2L_PORT_PINMUX(8, 0, 1)>, + <RZG2L_PORT_PINMUX(8, 1, 1)>, + <RZG2L_PORT_PINMUX(8, 2, 1)>, + <RZG2L_PORT_PINMUX(9, 0, 1)>, + <RZG2L_PORT_PINMUX(9, 1, 1)>, + <RZG2L_PORT_PINMUX(10, 0, 1)>, + <RZG2L_PORT_PINMUX(10, 1, 1)>; + }; + + sync { + pinmux = <RZG2L_PORT_PINMUX(6, 1, 1)>, /* HSYNC */ + <RZG2L_PORT_PINMUX(7, 0, 1)>; /* VSYNC */ + }; + + de { + pinmux = <RZG2L_PORT_PINMUX(7, 1, 1)>; /* DE */ + }; + + clk { + pinmux = <RZG2L_PORT_PINMUX(6, 0, 1)>; /* CLK */ + }; + }; +}; + +&dsi0 { + status = "disabled"; +}; + +&adv7535 { + status = "disabled"; +}; + +&du { + pinctrl-0 = <&du_pins>; + pinctrl-names = "default"; + status = "okay"; + + ports { + port@0 { + du_out_rgb: endpoint { + remote-endpoint = <&panel_in_rgb>; + }; + }; + }; +}; + +&adc { + status = "disabled"; };
If you use "compatible = "giantplus,gpm940b0"", please comment out the "panel-dpi" and its timing in devicetree and update the panel-simple.c driver with below diff:
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 35a3ceae9424..1588506d43f2 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -1965,22 +1965,22 @@ static const struct panel_desc giantplus_gpg482739qs5 = { .bus_format = MEDIA_BUS_FMT_RGB888_1X24, }; -static const struct display_timing giantplus_gpm940b0_timing = { - .pixelclock = { 13500000, 27000000, 27500000 }, - .hactive = { 320, 320, 320 }, - .hfront_porch = { 14, 686, 718 }, - .hback_porch = { 50, 70, 255 }, - .hsync_len = { 1, 1, 1 }, - .vactive = { 240, 240, 240 }, - .vfront_porch = { 1, 1, 179 }, - .vback_porch = { 1, 21, 31 }, - .vsync_len = { 1, 1, 6 }, - .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW, +static const struct drm_display_mode giantplus_gpm940b0_mode = { + .clock = 9000, + .hdisplay = 480, + .hsync_start = 480 + 8, + .hsync_end = 480 + 8 + 43, + .htotal = 800 + 8 + 43 + 41, + .vdisplay = 272, + .vsync_start = 272 + 4, + .vsync_end = 272 + 4 + 21, + .vtotal = 272 + 4 + 21 + 10, + .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, }; static const struct panel_desc giantplus_gpm940b0 = { - .timings = &giantplus_gpm940b0_timing, - .num_timings = 1, + .modes = &giantplus_gpm940b0_mode, + .num_modes = 1, .bpc = 8, .size = { .width = 60,
Also enable "DRM_PANEL_SIMPLE" config:
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 938efecc8d54..3d06c27d3eaf 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -444,3 +444,4 @@ CONFIG_RZV2M_TIM_CNT=y CONFIG_COUNTER=y CONFIG_RZ_MTU3_CNT=y CONFIG_RZ_TIMER_MTU3=y +CONFIG_DRM_PANEL_SIMPLE=y
i have enabled the driver in defconfig but doesnt seems to work driver is not being loaded. What to do about it.
please run "zcat /proc/config. gz | grep PANEL_SIMPLE" then send the output here.
By the way, do you make kernel manually or build by yocto?
i am building kernel manually
i did and i updated it here
calixto_admin@localhost:~$ zcat /proc/config. gz | grep PANEL_SIMPLE gzip: /proc/config..gz: No such file or directory gzip: gz.gz: No such file or directory
sorry, config.gz . It does not have a space ....
calixto_admin@localhost:~$ zcat /proc/config.gz | grep PANEL_SIMPLE# CONFIG_DRM_PANEL_SIMPLE is not set
.... it is not set. You should make defconfig to apply your configs changed!
i did make the config and kernel
here is the defconfig file should i add anything else to this
Please send us file ".config" in your linux directory.
I saw this:
CONFIG_DRM_PANEL_SIMPLE=ySo, is it correct Image that you are deploying your board?