[PATCH v2 0/5] drm/komeda: Improve IRQ error event prints

From: Mihail Atanassov <Mihail.Atanassov@arm.com>
To: "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>
Cc: Mihail Atanassov <Mihail.Atanassov@arm.com>, nd <nd@arm.com>,
	Mihail Atanassov <Mihail.Atanassov@arm.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>, Sean Paul <sean@poorly.run>,
	Liviu Dudau <Liviu.Dudau@arm.com>,
	Brian Starkey <Brian.Starkey@arm.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	"james qian wang (Arm Technology China)"
	<james.qian.wang@arm.com>,
	"Lowry Li (Arm Technology China)" <Lowry.Li@arm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 0/5] drm/komeda: Improve IRQ error event prints
Date: Thu, 7 Nov 2019 11:42:25 +0000	[thread overview]
Message-ID: <20191107114155.54307-1-mihail.atanassov@arm.com> (raw)

Hi everyone,

Sending out a v2 of the series since I had missed out a couple of issues
checkpatch caught.

Changes since v1 [https://patchwork.freedesktop.org/series/68325/]:
 - Fixed a couple of checkpatch issues in 2/5 and 5/5

v1's cover letter:

This is a smallish series that tries to remove some build-time
configurability in komeda and replace it with a debugfs control. Later
patches in the series add some extra functionality which I found useful
during my debugging sessions, so I figured I'd bake it in.

I've preserved the default behaviour as if CONFIG_KOMEDA_ERROR_PRINT
were enabled, so production kernels can have some feedback from the
driver when things are going south.

1: Introduce the err_verbosity debugfs node for komeda; this keeps the
   default of printing error events once per frame.
2: Drop CONFIG_KOMEDA_ERROR_PRINT since output can be disabled at
   runtime
3: Add a drm state dump on event. It's quite chatty so I left it only
   for error events; printing all that once per frame every vsync floods my
   serial terminal, so no info + state combination.
4: Add lower-severity categories to the event printer
5: Normally these events fire only once per pageflip, but sometimes it's
   useful to see them all as they come in.

These patches are overall quite tiny, and I was considering just
squashing them into one, but I opted to keep them separate for an easier
review experience; please let me know whether you prefer a single patch.
Thanks!

Mihail Atanassov (5):
  drm/komeda: Add debugfs node to control error verbosity
  drm/komeda: Remove CONFIG_KOMEDA_ERROR_PRINT
  drm/komeda: Optionally dump DRM state on interrupts
  drm/komeda: Add option to print WARN- and INFO-level IRQ events
  drm/komeda: add rate limiting disable to err_verbosity

 drivers/gpu/drm/arm/display/Kconfig           |  6 ----
 drivers/gpu/drm/arm/display/komeda/Makefile   |  5 ++--
 .../gpu/drm/arm/display/komeda/komeda_dev.c   |  4 +++
 .../gpu/drm/arm/display/komeda/komeda_dev.h   | 30 +++++++++++++++----
 .../gpu/drm/arm/display/komeda/komeda_event.c | 23 +++++++++++---
 .../gpu/drm/arm/display/komeda/komeda_kms.c   |  2 +-
 6 files changed, 51 insertions(+), 19 deletions(-)

-- 
2.23.0