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| author | Andrey Gusakov <andrey.gusakov@cogentembedded.com> | 2017-11-07 19:56:23 +0300 |
|---|---|---|
| committer | Andrzej Hajda <a.hajda@samsung.com> | 2017-11-30 07:56:12 +0100 |
| commit | 9217c1abbc145a77d65c476cf2004a3df02104c7 (patch) | |
| tree | 7e37fe8bdb1e03c578327927874f269f0f3eb85e | |
| parent | 66d1c3b94d5d59e4325e61a78d520f92c043d645 (diff) | |
| download | linux-keystone-9217c1abbc145a77d65c476cf2004a3df02104c7.tar.gz | |
drm/bridge: tc358767: fix AUXDATAn registers access
First four bytes should go to DP0_AUXWDATA0. Due to bug if
len > 4 first four bytes was writen to DP0_AUXWDATA1 and all
data get shifted by 4 bytes. Fix it.
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-6-git-send-email-andrey.gusakov@cogentembedded.com
| -rw-r--r-- | drivers/gpu/drm/bridge/tc358767.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index b916346b933a5f..24f495bf0567bd 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -318,7 +318,7 @@ static ssize_t tc_aux_transfer(struct drm_dp_aux *aux, tmp = (tmp << 8) | buf[i]; i++; if (((i % 4) == 0) || (i == size)) { - tc_write(DP0_AUXWDATA(i >> 2), tmp); + tc_write(DP0_AUXWDATA((i - 1) >> 2), tmp); tmp = 0; } } |