From: Thomas Zimmermann <tzimmermann@suse.de>
To: airlied@redhat.com, daniel@ffwll.ch, john.p.donnelly@oracle.com,
kraxel@redhat.com, sam@ravnborg.org
Cc: Thomas Zimmermann <tzimmermann@suse.de>, dri-devel@lists.freedesktop.org
Subject: [PATCH 0/4] drm/mgag200: Workaround HW bug with non-0 offset
Date: Tue, 26 Nov 2019 08:25:41 +0100 [thread overview]
Message-ID: <20191126072545.22663-1-tzimmermann@suse.de> (raw)
We found an MGA chip that does not interpret the scanout offset
correctly. This patch works around the problem by placing all buffer
objects at offset 0 on this system.
There's a new module parameter 'hw_bug_no_startadd' that enables and
disables the offset-0 placement. Default is auto-detection.
Thomas Zimmermann (4):
drm/mgag200: Extract device type from flags
drm/mgag200: Store flags from PCI driver data in device structure
drm/mgag200: Add workaround for HW that does not support 'startadd'
drm/mgag200: Add module parameter to pin all buffers at offset 0
drivers/gpu/drm/mgag200/mgag200_drv.c | 44 +++++++++++++++++++++++++-
drivers/gpu/drm/mgag200/mgag200_drv.h | 18 +++++++++++
drivers/gpu/drm/mgag200/mgag200_main.c | 3 +-
3 files changed, 63 insertions(+), 2 deletions(-)
--
2.23.0
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next reply other threads:[~2019-11-26 7:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-26 7:25 Thomas Zimmermann [this message]
2019-11-26 7:25 ` [PATCH 1/4] drm/mgag200: Extract device type from flags Thomas Zimmermann
2019-11-26 7:25 ` [PATCH 2/4] drm/mgag200: Store flags from PCI driver data in device structure Thomas Zimmermann
2019-11-26 7:25 ` [PATCH 3/4] drm/mgag200: Add workaround for HW that does not support 'startadd' Thomas Zimmermann
2019-11-26 9:37 ` Daniel Vetter
2019-11-26 9:50 ` Thomas Zimmermann
2019-12-03 17:55 ` John Donnelly
2019-12-04 7:30 ` Thomas Zimmermann
2019-12-04 9:36 ` Dave Airlie
2019-12-06 6:14 ` Thomas Zimmermann
2019-12-06 6:50 ` David Airlie
2019-12-06 7:51 ` Thomas Zimmermann
2019-11-26 7:25 ` [PATCH 4/4] drm/mgag200: Add module parameter to pin all buffers at offset 0 Thomas Zimmermann
2019-11-26 9:38 ` Daniel Vetter
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