drm/vc4: hdmi: Switch to pm_runtime_status_suspended

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[ Upstream commit fcef97e700 ]

If the controller isn't clocked or its domain powered up, the register
accesses will either stall the CPU or return garbage, respectively.

Thus, we had a warning in our register access function to complain when
that kind of risky accesses were performed.

In order to check the runtime_pm power state, we were using
pm_runtime_active(), but it turns out that it will become active only
once the runtime_resume hook has been executed.

This prevents us from doing any WARN-free register access in our
runtime_resume() implementation, while this is valid.

Let's switch to pm_runtime_status_suspended() instead.

Fixes: 14e193b956 ("drm/vc4: hdmi: Warn if we access the controller while disabled")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://lore.kernel.org/r/20220613144800.326124-23-maxime@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Dave Stevenson 2022-06-13 16:47:49 +02:00 • committed by Greg Kroah-Hartman

parent 6ecd49a51e

commit 0241244456

1 changed files with 2 additions and 2 deletions

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drivers/gpu/drm/vc4/vc4_hdmi_regs.h

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