From: Stefan Schake <stschake@gmail.com>
To: eric@anholt.net
Cc: airlied@linux.ie, linux-rpi-kernel@lists.infradead.org,
dri-devel@lists.freedesktop.org,
Stefan Schake <stschake@gmail.com>
Subject: [PATCH 0/3] drm/vc4: Improve alpha format plane support
Date: Tue, 6 Mar 2018 02:48:36 +0100 [thread overview]
Message-ID: <1520300919-103427-1-git-send-email-stschake@gmail.com> (raw)
This series improves the handling of alpha formats with the VC4 HVS
compositor. Alpha formats are marked as premultiplied as is standard
for DRM. Further fix a display corruption issue when planes with
per-pixel alpha try blending from the (nonexistent) background by
selectively enabling a black background color fill.
This series follows the changes suggested by Eric Anholt in a previous
patch discussion:
https://patchwork.freedesktop.org/patch/207667/
A simple test program for the display corruption issue is available:
https://github.com/stschake/vc4-alpha-test
Stefan Schake (3):
drm/vc4: Set premultiplied for alpha formats
drm/vc4: Check if plane requires background fill
drm/vc4: Enable background color fill when necessary
drivers/gpu/drm/vc4/vc4_crtc.c | 22 ++++++++++++++++++++++
drivers/gpu/drm/vc4/vc4_drv.h | 6 ++++++
drivers/gpu/drm/vc4/vc4_plane.c | 16 +++++++++++++++-
drivers/gpu/drm/vc4/vc4_regs.h | 1 +
4 files changed, 44 insertions(+), 1 deletion(-)
--
2.7.4
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next reply other threads:[~2018-03-06 1:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 1:48 Stefan Schake [this message]
2018-03-06 1:48 ` [PATCH 1/3] drm/vc4: Set premultiplied for alpha formats Stefan Schake
2018-03-06 19:35 ` Eric Anholt
2018-03-06 19:43 ` Stefan Schake
2018-03-06 1:48 ` [PATCH 2/3] drm/vc4: Check if plane requires background fill Stefan Schake
2018-03-06 19:43 ` Ville Syrjälä
2018-03-07 0:10 ` Eric Anholt
2018-03-07 15:05 ` Ville Syrjälä
2018-03-07 15:50 ` Eric Anholt
2018-03-06 1:48 ` [PATCH 3/3] drm/vc4: Enable background color fill when necessary Stefan Schake
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