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drm/bridge: tc358767: fix single lane configuration

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[ Upstream commit 4d9d54a730434cc068dd3515ba6116697196f77b ]

PHY_2LANE bit is always set in DP_PHY_CTRL, breaking 1 lane use.

Set PHY_2LANE only when 2 lanes are used.

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/20190103115954.12785-4-tomi.valkeinen@ti.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tomi Valkeinen 2019-01-03 13:59:50 +02:00 committed by Greg Kroah-Hartman
parent e82a795e99
commit 64cea428b1
1 changed files with 8 additions and 2 deletions
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10
drivers/gpu/drm/bridge/tc358767.c
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@ -541,6 +541,7 @@ static int tc_aux_link_setup(struct tc_data *tc)
unsigned long rate;
u32 value;
int ret;
u32 dp_phy_ctrl;
rate = clk_get_rate(tc->refclk);
switch (rate) {
@ -565,7 +566,10 @@ static int tc_aux_link_setup(struct tc_data *tc)
value |= SYSCLK_SEL_LSCLK | LSCLK_DIV_2;
tc_write(SYS_PLLPARAM, value);
tc_write(DP_PHY_CTRL, BGREN | PWR_SW_EN | PHY_2LANE | PHY_A0_EN);
dp_phy_ctrl = BGREN | PWR_SW_EN | PHY_A0_EN;
if (tc->link.base.num_lanes == 2)
dp_phy_ctrl |= PHY_2LANE;
tc_write(DP_PHY_CTRL, dp_phy_ctrl);
/*
* Initially PLLs are in bypass. Force PLL parameter update,
@ -858,7 +862,9 @@ static int tc_main_link_setup(struct tc_data *tc)
tc_write(SYS_PLLPARAM, value);
/* Setup Main Link */
dp_phy_ctrl = BGREN | PWR_SW_EN | PHY_2LANE | PHY_A0_EN | PHY_M0_EN;
dp_phy_ctrl = BGREN | PWR_SW_EN | PHY_A0_EN | PHY_M0_EN;
if (tc->link.base.num_lanes == 2)
dp_phy_ctrl |= PHY_2LANE;
tc_write(DP_PHY_CTRL, dp_phy_ctrl);
msleep(100);