[PATCH v5 0/1] drm/bridge: it6505: fix hibernate to resume no display issue

From: kuro
Date: Fri Apr 19 2024 - 03:28:37 EST


From: Kuro <kuro.chung@xxxxxxxxxx>


New patch description for v5 patch

after customer feedback and test finished, update again, kernel build pass.

New patch description for v4 patch

update by reviewer Pin-yen Lin comment, remove function it6505_irq_video_fifo_error/it6505_irq_io_latch_fifo_overflow
update by reviewer Pin-yen Lin comment, update Signed-off-by column

New patch description for v3 patch

update upstream MAINTAINERS mail list

New patch description for v2 patch

Missing declaration for i variable in function it6505_irq_video_error_handler
, add it by this patch

Origianl description for v1 patch

drm/bridge: it6505: fix hibernate to resume no display issue

ITE added a FIFO reset bit for input video. When system power resume,
the TTL input of it6505 may get some noise before video signal stable
and the hardware function reset is required.
But the input FIFO reset will also trigger error interrupts of output module rising.
Thus, it6505 have to wait a period can clear those expected error interrupts
caused by manual hardware reset in one interrupt handler calling to avoid interrupt looping.


allen (1):
UPSTREAM: drm/bridge: it6505: fix hibernate to resume no display issue

drivers/gpu/drm/bridge/ite-it6505.c | 181 +++++++++++++++++++---------
1 file changed, 124 insertions(+), 57 deletions(-)

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2.25.1