3.16.7-ckt3 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Benjamin Herrenschmidt <b...@kernel.crashing.org>
commit db79afa1e57925ba96ab18514c0ebe42a28e393e upstream.
A number of radeon cards have a HW limitation causing them to be
unable to generate the full 64-bit of address bits for MSIs. This
breaks MSIs on some platforms such as POWER machines.
We used to have a powerpc specific quirk to address that on a
single card, but this doesn't scale very well, this is better
put under control of the drivers who know precisely what a given
HW revision can do.
We now have a generic quirk in the PCI code. We should set it
appropriately for all radeon's from the audio driver.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Reviewed-by: Takashi Iwai <ti...@suse.de>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
sound/pci/hda/hda_intel.c | 10 ++++++++--
sound/pci/hda/hda_priv.h | 1 +
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index ba0266f7cf03..6383971dcd15 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -252,7 +252,8 @@ enum {
/* quirks for ATI/AMD HDMI */
#define AZX_DCAPS_PRESET_ATI_HDMI \
- (AZX_DCAPS_NO_TCSEL | AZX_DCAPS_SYNC_WRITE | AZX_DCAPS_POSFIX_LPIB)
+ (AZX_DCAPS_NO_TCSEL | AZX_DCAPS_SYNC_WRITE | AZX_DCAPS_POSFIX_LPIB|\
+ AZX_DCAPS_NO_MSI64)
/* quirks for Nvidia */
#define AZX_DCAPS_PRESET_NVIDIA \
@@ -1297,9 +1298,14 @@ static int azx_first_init(struct azx *chip)
return -ENXIO;
}
- if (chip->msi)
+ if (chip->msi) {
+ if (chip->driver_caps & AZX_DCAPS_NO_MSI64) {
+ dev_dbg(card->dev, "Disabling 64bit MSI\n");
+ pci->no_64bit_msi = true;
+ }
if (pci_enable_msi(pci) < 0)
chip->msi = 0;
+ }
if (azx_acquire_irq(chip, 0) < 0)
return -EBUSY;
diff --git a/sound/pci/hda/hda_priv.h b/sound/pci/hda/hda_priv.h
index e9d1a5762a55..526bc876f0a1 100644
--- a/sound/pci/hda/hda_priv.h
+++ b/sound/pci/hda/hda_priv.h
@@ -191,6 +191,7 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
#define AZX_DCAPS_PM_RUNTIME (1 << 26) /* runtime PM support */
#define AZX_DCAPS_I915_POWERWELL (1 << 27) /* HSW i915 powerwell support */
#define AZX_DCAPS_CORBRP_SELF_CLEAR (1 << 28) /* CORBRP clears itself after
reset */
+#define AZX_DCAPS_NO_MSI64 (1 << 29) /* Stick to 32-bit MSIs */
/* position fix mode */
enum {
--
2.1.3
--
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