Re: [PATCH v5 00/80] drm/vc4: Support BCM2711 Display Pipeline

Hi!

On Fri, Sep 04, 2020 at 06:16:16PM +0800, Jian-Hong Pan wrote:

Thanks for version 5 patch series!

I applied it based on linux-next tag next-20200828 and build it with
the config [1] to test on RPi 4
However, It fails to get HDMI state machine clock and pixel bcb clock.
Then, vc4-drm probes failed. Full dmseg [2]:

[    2.552675] [drm:vc5_hdmi_init_resources] *ERROR* Failed to get
HDMI state machine clock
[    2.557974] raspberrypi-firmware soc:firmware: Attached to firmware
from 2020-06-01T13:23:40
[    2.567612] of_clk_hw_onecell_get: invalid index 14
[    2.567636] [drm:vc5_hdmi_init_resources] *ERROR* Failed to get
pixel bvb clock
[    2.567664] vc4-drm gpu: failed to bind fef00700.hdmi (ops vc4_hdmi_ops): -2
[    2.567731] vc4-drm gpu: master bind failed: -2
[    2.567755] vc4-drm: probe of gpu failed with error -2

Sorry, I should have mentionned it in the cover letter. This series
depends on that patch from Hoegeun:
https://lore.kernel.org/dri-devel/20200901040759.29992-2-hoegeun.kwon@samsung.com/ (local)

Maxime