[PATCH 6.8 233/715] wifi: mt76: mt7996: fix fw loading timeout

Sasha Levin
2024-03-24T22:38:47Z

From: Lorenzo Bianconi <lorenzo@kernel.org>

[ Upstream commit 030d2e287a902b44ef45e660cf1d73af23fe7d2e ]

Fix the following firmware loading error due to a wrong dma register
configuration if wed is disabled.

[ 8.245881] mt7996e_hif 0001:01:00.0: assign IRQ: got 128
[ 8.251308] mt7996e_hif 0001:01:00.0: enabling device (0000 -> 0002)
[ 8.257674] mt7996e_hif 0001:01:00.0: enabling bus mastering
[ 8.263488] mt7996e 0000:01:00.0: assign IRQ: got 126
[ 8.268537] mt7996e 0000:01:00.0: enabling device (0000 -> 0002)
[ 8.274551] mt7996e 0000:01:00.0: enabling bus mastering
[ 28.648773] mt7996e 0000:01:00.0: Message 00000010 (seq 1) timeout
[ 28.654959] mt7996e 0000:01:00.0: Failed to get patch semaphore
[ 29.661033] mt7996e: probe of 0000:01:00.0 failed with error -11

Suggested-by: "Sujuan Chen" <sujuan.chen@mediatek.com>
Fixes: 4920a3a1285f ("wifi: mt76: mt7996: set DMA mask to 36 bits for boards with more than 4GB of RAM")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mt7996/dma.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/dma.c b/drivers/net/wireless/mediatek/mt76/mt7996/dma.c
index 483ad81b6eec6..fe37110e66875 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/dma.c
@@ -237,7 +237,8 @@ void mt7996_dma_start(struct mt7996_dev *dev, bool reset, bool wed_reset)
MT_WFDMA0_GLO_CFG_TX_DMA_EN |
MT_WFDMA0_GLO_CFG_RX_DMA_EN |
MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
- MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);
+ MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 |
+ MT_WFDMA0_GLO_CFG_EXT_EN);

if (dev->hif2)
mt76_set(dev, MT_WFDMA0_GLO_CFG + hif1_ofs,
--
2.43.0