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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2013-10-10 14:18:36 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-11 22:30:32 (GMT) |
| commit | a2210d578820f12190fdde4d33758a17336ab4fc (patch) | |
| tree | cb49102220c6853fa5c34f268c3dec3db1497b9e /drivers/staging/imx-drm | |
| parent | c35d6a37bdcb1dde42dd65b00676696e2dd78f2f (diff) | |
| download | linux-fsl-qoriq-a2210d578820f12190fdde4d33758a17336ab4fc.tar.xz | |
staging: drm/imx: also allow to allocate only 2 DMFC slots for DP full plane
Connecting a 320x240 parallel display on i.MX6 resulted in an invalid DRDY
signal because the DC would not receive NL/EOL events on every line.
Reducing the allocated DMFC space from 4 slots (256 * 128-bit) to 2 slots
(128 * 128-bit) solved the problem.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/imx-drm')
| -rw-r--r-- | drivers/staging/imx-drm/ipu-v3/ipu-dmfc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-dmfc.c b/drivers/staging/imx-drm/ipu-v3/ipu-dmfc.c index 2e97c33..98070dd 100644 --- a/drivers/staging/imx-drm/ipu-v3/ipu-dmfc.c +++ b/drivers/staging/imx-drm/ipu-v3/ipu-dmfc.c @@ -307,13 +307,13 @@ int ipu_dmfc_alloc_bandwidth(struct dmfc_channel *dmfc, goto out; } - /* Always allocate at least 128*4 bytes (2 slots) */ - if (slots < 2) - slots = 2; - /* For the MEM_BG channel, first try to allocate twice the slots */ if (dmfc->data->ipu_channel == IPUV3_CHANNEL_MEM_BG_SYNC) segment = dmfc_find_slots(priv, slots * 2); + else if (slots < 2) + /* Always allocate at least 128*4 bytes (2 slots) */ + slots = 2; + if (segment >= 0) slots *= 2; else |