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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2017-10-10 15:13:55 +0200 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2017-10-11 10:45:06 +0200 |
| commit | cda77556447c782b3c9c068f81ef58136cb487c3 (patch) | |
| tree | cae8626937bffa5bfcf8550e84cdc9a773a4a3e4 /drivers/gpu/ipu-v3/ipu-common.c | |
| parent | Linux 4.14-rc4 (diff) | |
| download | linux-cda77556447c782b3c9c068f81ef58136cb487c3.tar.xz linux-cda77556447c782b3c9c068f81ef58136cb487c3.zip | |
gpu: ipu-v3: Allow channel burst locking on i.MX6 only
The IDMAC_LOCK_EN registers on i.MX51 have a different layout, and on
i.MX53 enabling the lock feature causes bursts to get lost. Restrict
enabling the burst lock feature to i.MX6.
Reported-by: Patrick Brünn <P.Bruenn@beckhoff.com>
Fixes: 790cb4c7c954 ("drm/imx: lock scanout transfers for consecutive bursts")
Tested-by: Patrick Brünn <P.Bruenn@beckhoff.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-common.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c index 6a573d21d3cc..658fa2d3e40c 100644 --- a/drivers/gpu/ipu-v3/ipu-common.c +++ b/drivers/gpu/ipu-v3/ipu-common.c @@ -405,6 +405,14 @@ int ipu_idmac_lock_enable(struct ipuv3_channel *channel, int num_bursts) return -EINVAL; } + /* + * IPUv3EX / i.MX51 has a different register layout, and on IPUv3M / + * i.MX53 channel arbitration locking doesn't seem to work properly. + * Allow enabling the lock feature on IPUv3H / i.MX6 only. + */ + if (bursts && ipu->ipu_type != IPUV3H) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(idmac_lock_en_info); i++) { if (channel->num == idmac_lock_en_info[i].chnum) break; |