diff options
| author | Francesco Dolcini <francesco.dolcini@toradex.com> | 2023-04-17 19:32:53 +0200 |
|---|---|---|
| committer | Francesco Dolcini <francesco.dolcini@toradex.com> | 2023-04-28 14:38:53 +0200 |
| commit | 05a0443a072947adafd544113d7a4e341c10fb54 (patch) | |
| tree | c6420e18ddc9458b040eafc7b7c0695acc78cc04 | |
| parent | 7292d99b6de959212e12aefd36a4382f7dfc8684 (diff) | |
drm/bridge: tc358768: fix TXTAGOCNT computation
Correct computation of TXTAGOCNT register.
This register must be set to a value that ensure that the
TTA-GO period = (4 x TLPX)
with the actual value of TTA-GO being
4 x (TXTAGOCNT + 1) x (HSByteClk cycle)
Upstream-Status: Submitted [https://lore.kernel.org/all/20230427142934.55435-1-francesco@dolcini.it/]
Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
| -rw-r--r-- | drivers/gpu/drm/bridge/tc358768.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index 550f1567c1f8..0af55a0653b9 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -796,7 +796,7 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) /* TXTAGOCNT[26:16] RXTASURECNT[10:0] */ val = tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk * 4); - val = tc358768_ns_to_cnt(val, dsibclk_nsk) - 1; + val = tc358768_ns_to_cnt(val, dsibclk_nsk) / 4 - 1; val2 = tc358768_ns_to_cnt(tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk), dsibclk_nsk) - 2; val = val << 16 | val2; |