[RESEND 0/5] drm/mxsfb: Fix runtime PM for unpowering lcdif block

From: Leonard Crestez
Date: Mon Sep 17 2018 - 09:43:07 EST

Adding lcdif nodes to a power domain currently doesn't work, it results
in black/corrupted screens or hangs. While the driver does enable
runtime pm it does not deal correctly with the block being unpowered.


All patches in this series have review tags from a while ago and I
tested them again on top of next-20180913. No changes since last
version: https://lkml.org/lkml/2018/8/27/299

This series stalled so I reached out to Marek on IRC and he was
surprised to be listed as maintainer and asked me to resend and add
Daniel Vetter.

Perhaps it would help to clarify that the pengutronix people should feel
free to push patches in this area?

Right now drm/imx is mostly for IPUv3 but there are other display output
paths on imx, such as the LCDIF supported by this driver. This LCDIF
block is included on imx8 so still quite relevant.

Leonard Crestez (5):
drm/mxsfb: Move axi clk enable/disable to crtc enable/disable
drm/mxsfb: Fix initial corrupt frame when activating display
drm/mxsfb: Add pm_runtime calls to pipe_enable/disable
drm/mxsfb: Add PM_SLEEP support
drm/mxsfb: Switch to drm_atomic_helper_commit_tail_rpm

drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 53 +++++++++++++++++++-----------
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 40 ++++++++++++++++++++++
2 files changed, 74 insertions(+), 19 deletions(-)