linux-kernel - [PATCH 0/5] drm/etnaviv: Ignore MC bit when checking for runtime suspend

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Message-Id: <cover.1583176306.git.agx@sigxcpu.org>
Date:   Mon,  2 Mar 2020 20:13:31 +0100
From:   Guido Günther <agx@...xcpu.org>
To:     Lucas Stach <l.stach@...gutronix.de>,
        Russell King <linux+etnaviv@...linux.org.uk>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, etnaviv@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/5] drm/etnaviv: Ignore MC bit when checking for runtime suspend

At least GC7000 fails to enter runtime suspend for long periods of time since
the MC becomes busy again even when the FE is idle. The rest of the series
makes detecting similar issues easier to debug in the future by checking
all known bits in debugfs and also warning in the EBUSY case.

Tested on GC7000 with a reduced runtime delay of 50ms. Patches are
against next-20200226.

Thanks to Lucas Stach for pointing me in the right direction.

Guido Günther (5):
  drm/etnaviv: Fix typo in comment
  drm/etnaviv: Update idle bits
  drm/etnaviv: Consider all kwnown idle bits in debugfs
  drm/etnaviv: Ignore MC when checking runtime suspend idleness
  drm/etnaviv: Warn when GPU doesn't idle fast enough

 drivers/gpu/drm/etnaviv/etnaviv_gpu.c  | 26 ++++++++++++++++++++++----
 drivers/gpu/drm/etnaviv/state_hi.xml.h |  7 +++++++
 2 files changed, 29 insertions(+), 4 deletions(-)

-- 
2.23.0