diff options
| author | Dom Cobley <popcornmix@gmail.com> | 2024-06-21 16:20:40 +0100 |
|---|---|---|
| committer | Dave Stevenson <dave.stevenson@raspberrypi.com> | 2024-09-09 13:02:53 +0100 |
| commit | 223ee2567a55e4f80315c768d2969e6a3b9fb23d (patch) | |
| tree | 99b32c9224d0b45038e3f4a505222b9c08dc8534 /tools/perf/builtin-script.c | |
| parent | 542962190e55be21fc600ffed47a50390b6101cc (diff) | |
drm/vc4: hdmi: Avoid hang with debug registers when suspended
Trying to read /sys/kernel/debug/dri/1/hdmi1_regs
when the hdmi is disconnected results in a fatal system hang.
This is due to the pm suspend code disabling the dvp clock.
That is just a gate of the 108MHz clock in DVP_HT_RPI_MISC_CONFIG,
which results in accesses hanging AXI bus.
Protect against this.
Fixes: 25eb441d55d4 ("drm/vc4: hdmi: Add all the vc5 HDMI registers into the debugfs dumps")
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240621152055.4180873-17-dave.stevenson@raspberrypi.com
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Diffstat (limited to 'tools/perf/builtin-script.c')
0 files changed, 0 insertions, 0 deletions