diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2019-11-26 11:19:50 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-01-07 11:53:19 +0100 |
| commit | 3cacb2086e41bbdf4a43e494d47d05db356992b9 (patch) | |
| tree | e695c0fe603c505255198488b35b986f8c856e6b | |
| parent | 0fb5f69e19643569b6d42ce437a830e95555f1e5 (diff) | |
| download | linux-3cacb2086e41bbdf4a43e494d47d05db356992b9.tar.bz2 | |
drm/mgag200: Add module parameter to pin all buffers at offset 0
For hardware that does not interpret the startadd field correctly,
add the module parameter 'hw_bug_no_startadd', which enables the
workaround.
v3:
* style and typo fixes
v2:
* ask user for feedback if the option is active
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: John Donnelly <john.p.donnelly@oracle.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191126101950.11989-1-tzimmermann@suse.de
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_drv.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index ee4fb9c53d9f..7a5bad2f57d7 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -27,6 +27,10 @@ int mgag200_modeset = -1; MODULE_PARM_DESC(modeset, "Disable/Enable modesetting"); module_param_named(modeset, mgag200_modeset, int, 0400); +int mgag200_hw_bug_no_startadd = -1; +MODULE_PARM_DESC(modeset, "HW does not interpret scanout-buffer start address correctly"); +module_param_named(hw_bug_no_startadd, mgag200_hw_bug_no_startadd, int, 0400); + static struct drm_driver driver; static const struct pci_device_id pciidlist[] = { @@ -97,6 +101,16 @@ DEFINE_DRM_GEM_FOPS(mgag200_driver_fops); static bool mgag200_pin_bo_at_0(const struct mga_device *mdev) { + if (mgag200_hw_bug_no_startadd > 0) { + DRM_WARN_ONCE("Option hw_bug_no_startradd is enabled. Please " + "report the output of 'lspci -vvnn' to " + "<dri-devel@lists.freedesktop.org> if this " + "option is required to make mgag200 work " + "correctly on your system.\n"); + return true; + } else if (!mgag200_hw_bug_no_startadd) { + return false; + } return mdev->flags & MGAG200_FLAG_HW_BUG_NO_STARTADD; } |