From a18cee15ed4c8b6a35f96b7b26a46bac32e04bd9 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 1 Nov 2011 14:20:30 -0400 Subject: drm/radeon/kms: add MSI module parameter 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 Cc: stable@kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_drv.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/gpu/drm/radeon/radeon_drv.c') diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index e71d2ed7fa11..c12b0775d688 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; -- cgit v1.2.3