diff options
| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2019-01-03 13:59:51 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-20 10:18:29 +0100 |
| commit | 29bcecd9f4e6138887694ca63f51ee352836a3a5 (patch) | |
| tree | 7f86a542c0b2a533b1b39321289b7dff14182e97 /drivers/gpu/drm | |
| parent | 64cea428b151c84309cc861d20cf4e9b8617e886 (diff) | |
drm/bridge: tc358767: fix initial DP0/1_SRCCTRL value
[ Upstream commit 9a63bd6fe1b5590ffa42ae2ed22ee21363293e31 ]
Initially DP0_SRCCTRL is set to a static value which includes
DP0_SRCCTRL_LANES_2 and DP0_SRCCTRL_BW27, even when only 1 lane of
1.62Gbps speed is used. DP1_SRCCTRL is configured to a magic number.
This patch changes the configuration as follows:
Configure DP0_SRCCTRL by using tc_srcctrl() which provides the correct
value.
DP1_SRCCTRL needs two bits to be set to the same value as DP0_SRCCTRL:
SSCG and BW27. All other bits can be zero.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190103115954.12785-5-tomi.valkeinen@ti.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/bridge/tc358767.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 8098297c5fe5..dbe403ea130d 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -834,12 +834,11 @@ static int tc_main_link_setup(struct tc_data *tc) if (!tc->mode) return -EINVAL; - /* from excel file - DP0_SrcCtrl */ - tc_write(DP0_SRCCTRL, DP0_SRCCTRL_SCRMBLDIS | DP0_SRCCTRL_EN810B | - DP0_SRCCTRL_LANESKEW | DP0_SRCCTRL_LANES_2 | - DP0_SRCCTRL_BW27 | DP0_SRCCTRL_AUTOCORRECT); - /* from excel file - DP1_SrcCtrl */ - tc_write(DP1_SRCCTRL, 0x00003083); + tc_write(DP0_SRCCTRL, tc_srcctrl(tc)); + /* SSCG and BW27 on DP1 must be set to the same as on DP0 */ + tc_write(DP1_SRCCTRL, + (tc->link.spread ? DP0_SRCCTRL_SSCG : 0) | + ((tc->link.base.rate != 162000) ? DP0_SRCCTRL_BW27 : 0)); rate = clk_get_rate(tc->refclk); switch (rate) { |