diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2011-11-01 14:20:30 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-11 09:44:08 -0800 |
| commit | 55fe133c7286a789ad5eb3f1afca27c2348fddd5 (patch) | |
| tree | 00fe6dd5a6c70316c24cf272a3b87a436fe6ca25 | |
| parent | d75d680945bd3624f4c1958e0a5d8216983d30b6 (diff) | |
drm/radeon/kms: add MSI module parameter
commit a18cee15ed4c8b6a35f96b7b26a46bac32e04bd9 upstream.
Allow the user to override whether MSIs are enabled
or not on supported ASICs. MSIs are disabled by default
on IGP chips as they tend not to work. However certain
IGP chips only seem to work with MSIs enabled.
I suspect this is a chipset or bios issue, but I'm not sure
what the proper fix is. This will at least make diagnosing
and working around the problem much easier.
See:
https://bugs.freedesktop.org/show_bug.cgi?id=37679
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_drv.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_irq_kms.c | 6 |
3 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index c1e056b35b2..184628c7e02 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -93,6 +93,7 @@ extern int radeon_audio; extern int radeon_disp_priority; extern int radeon_hw_i2c; extern int radeon_pcie_gen2; +extern int radeon_msi; /* * Copy from radeon_drv.h so we don't have to include both and have conflicting diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index e71d2ed7fa1..c12b0775d68 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -118,6 +118,7 @@ int radeon_audio = 0; int radeon_disp_priority = 0; int radeon_hw_i2c = 0; int radeon_pcie_gen2 = 0; +int radeon_msi = -1; MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers"); module_param_named(no_wb, radeon_no_wb, int, 0444); @@ -164,6 +165,9 @@ module_param_named(hw_i2c, radeon_hw_i2c, int, 0444); MODULE_PARM_DESC(pcie_gen2, "PCIE Gen2 mode (1 = enable)"); module_param_named(pcie_gen2, radeon_pcie_gen2, int, 0444); +MODULE_PARM_DESC(msi, "MSI support (1 = enable, 0 = disable, -1 = auto)"); +module_param_named(msi, radeon_msi, int, 0444); + static int radeon_suspend(struct drm_device *dev, pm_message_t state) { drm_radeon_private_t *dev_priv = dev->dev_private; diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c index a68c626652c..fecc1aae382 100644 --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c @@ -118,6 +118,12 @@ static bool radeon_msi_ok(struct radeon_device *rdev) if (rdev->flags & RADEON_IS_AGP) return false; + /* force MSI on */ + if (radeon_msi == 1) + return true; + else if (radeon_msi == 0) + return false; + /* Quirks */ /* HP RS690 only seems to work with MSIs. */ if ((rdev->pdev->device == 0x791f) && |