[PATCH 0/5] drm/vc4: hdmi: Remove CPU hangs, take 2

[Maxime Ripard]

Hi,

Here's another attempt at fixing the complete CPU stall while retrieving the
HDMI connector status when the connector is disabled.

This was fixed already, but eventually got reverted by Linus due to the same
symptom happening in another situation. This was likely (but not confirmed by
the reporter) due to the kernel being booted without an HDMI display connected,
in which case the firmware won't initialise the HDMI State Machine clock.

This is fixed by patch 3. However, further changes in the clock drivers were
needed for clk_set_min_rate to be used, which are patches 1 and 2.

Finally, patches 4 and 5 are the original patches that were reverted. Patch 4
got a small modification to move the clk_set_min_rate() call before the HSM
clock is enabled.

Let me know what you think,
Maxime

Maxime Ripard (5):
  clk: bcm-2835: Pick the closest clock rate
  clk: bcm-2835: Remove rounding up the dividers
  drm/vc4: hdmi: Set a default HSM rate
  drm/vc4: hdmi: Move the HSM clock enable to runtime_pm
  drm/vc4: hdmi: Make sure the controller is powered in detect

 drivers/clk/bcm/clk-bcm2835.c  | 13 ++---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 90 ++++++++++++++++++++++++----------
 2 files changed, 68 insertions(+), 35 deletions(-)

-- 
2.31.1