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Layer containing NXP hardware support metadata
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firmware-imx: DP-Firmware communication times out since 8.22 #1887

Open tq-steina opened 1 month ago

tq-steina commented 1 month ago

Hi,

I noticed that since firmware-imx_8.22 the dpfw.bin DP-Firmware for i.MX8 times out during intial communication. My platform is TQMa8x featuring an i.MX8QM and a DP output.. In my case the firmware itself is already loaded by u-boot, resulting in the following kernel messages:

[    2.409104] cdns-mhdp-imx 56268000.hdmi: lane-mapping 0x1b
[    2.414614] cdns-mhdp-imx 56268000.hdmi: Failed to get i2c-over-aux-retries - using default 5
[    2.423157] cdns-mhdp-imx 56268000.hdmi: i2c-over-aux-retries 0x05
[    2.431904] cdns-mhdp-imx 56268000.hdmi: Direct firmware load for dpfw.bin failed with error -2
[    2.439401] [drm] Started firmware!
[    2.440630] cdns-mhdp-imx 56268000.hdmi: Falling back to sysfs fallback for: dpfw.bin
[    2.456416] [drm] set maximum defer retry to 5
[    2.456433] [drm] HDP FW Version - ver 35083 verlib 20560
[    2.479050] [drm] Only HDCP 2.2 is enabled
[    7.483304] cdns-mhdp-imx 56268000.hdmi: [drm:cdns_mhdp_reg_read] *ERROR* Failed to read register.

This log is from v6.6, but it's also happening for v6.1. Once I revert the following commits on top top of scarthgap branch on meta-freescale DP works as expected:

Here is the log from firmware-imx_8.18:

[    2.384569] cdns-mhdp-imx 56268000.hdmi: lane-mapping 0x1b
[    2.390084] cdns-mhdp-imx 56268000.hdmi: Failed to get i2c-over-aux-retries - using default 5
[    2.398642] cdns-mhdp-imx 56268000.hdmi: i2c-over-aux-retries 0x05
[    2.407872] cdns-mhdp-imx 56268000.hdmi: Direct firmware load for dpfw.bin failed with error -2
[    2.412061] [drm] Started firmware!
[    2.416605] cdns-mhdp-imx 56268000.hdmi: Falling back to sysfs fallback for: dpfw.bin
[    2.432896] [drm] set maximum defer retry to 5
[    2.432906] [drm] HDP FW Version - ver 34559 verlib 20560
[    2.452048] [drm] Only HDCP 2.2 is enabled
[    2.465703] cdns-mhdp-imx 56268000.hdmi: wrong link rate index
[    2.475780] imx-drm display-subsystem: bound 56268000.hdmi (ops cdns_mhdp_imx_ops)
[    2.484179] [drm] Initialized imx-drm 1.0.0 20120507 for display-subsystem on minor 0

I noticed the version difference 34559 <-> 35083, but I have no information what actually changed. This is FW upgrade require an additional change which I do not know?

otavio commented 3 weeks ago

Is it possible for you to check with the latest release?

tq-steina commented 5 days ago

You mean firmware-imx_8.24? I did, that's when I noticed the problem. As far as I can tell, it's the same firmware version for dpfw.bin, according to Linux kernel log.