In mx8_v4l2_cap_drm.c file drmModeSetCrtc() function getting failed

[mallibeerala]

Hi,

I am working on I.MX8 board and which is connected to video decoder board, In mx8_v4l2_cap_drm.c file drmModeSetCrtc() function getting failed when I created frame buffer with BPP(BitsPerPixel) is 24 but it is getting success when BPP(BitsPerPixel) value is 16, 32, 40 and 48.

Please help us to resolve this Issue.

Thanks & Regards,
Mallikarjuna B.

[joanxie]

what imx8 board do you use?

[mallibeerala]

Hi,

I am using I.MX8QM board.

Thanks & Regards,
Mallikarjuna B.

[mallibeerala]

Hi,

I am connecting video decoder board to my I.MX8QM board and I am supplying RGB888 data format to I.MX8QM board, for capturing video data I am running following command "mx8_v4l2_cap_drm -cam 1 -fmt BGR3". We are providing bpp as 32 from mx8_v4l2_cap_drm.c file then Image displaying in HDMI port of I.MX8QM is as below. and it is creating issue(drmModeSetCrtc() function getting failed) when I am providing bpp value is 24.

mxc-isi-cap - using mxc_isi_out_formats is, {
.name = "BGR24",
.fourcc = V4L2_PIX_FMT_BGR24,
.depth = { 32},
.color = MXC_ISI_OUT_FMT_RGB32P,
.memplanes = 1,
.colplanes = 1,
.mbus_code = MEDIA_BUS_FMT_RGB888_1X24,
}

Now I am getting Image as per below, some portion of screen at end it is in black color.

mxc-isi-cap - using mxc_isi_out_formats is, {
.name = "BGR24",
.fourcc = V4L2_PIX_FMT_BGR24,
.depth = { 24},
.color = MXC_ISI_OUT_FMT_RGB32P,
.memplanes = 1,
.colplanes = 1,
.mbus_code = MEDIA_BUS_FMT_RGB888_1X24,
}

I am getting image as below.

Please help us to resolve this Issue.

Thanks & Regards,
Mallikarjuna B.

[joanxie]

could you share the logfile with me when you use "mx8_v4l2_cap_drm -cam 1 -fmt BGR3" ?

how about try the enclosed file? any difference?

[mallibeerala]

Hi,

Please find the attached log data when I am using "mx8_v4l2_cap_drm -cam 1 -fmt BGR3".

with mx8_v4l2_cap_drm.7z, I am running "mx8_v4l2_cap_drm -cam 1 -fmt BGR3" then I am getting Image as below.

Please provide latest mx8_v4l2_cap_drm.c file.

Thanks & Regards,
Mallikarjuna B.

[joanxie]

did you try the latest bsp version? we have released the 5.10.72

"https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

refer to the source code, already support BGR24

"https://source.codeaurora.org/external/imx/linux-imx/tree/drivers/staging/media/imx/imx8-isi-cap.c?h..."

[joanxie]

how about :

{
		.name		= "RGB24",
		.fourcc		= V4L2_PIX_FMT_RGB24,
		.depth		= { 24 },
		.color		= MXC_ISI_OUT_FMT_BGR32P,
		.memplanes	= 1,
		.colplanes	= 1,
		.mbus_code  = MEDIA_BUS_FMT_RGB888_1X24,
	}, {

[mallibeerala]

Hi,

I am getting below image while running RGB24 format.

Thanks & Regards,
Mallikarjuna B.