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authorTomi Valkeinen <tomi.valkeinen@ti.com>2019-01-03 13:59:51 +0200
committerAndrzej Hajda <a.hajda@samsung.com>2019-01-09 10:49:30 +0100
commit9a63bd6fe1b5590ffa42ae2ed22ee21363293e31 (patch)
tree9a9b97eac63ceefee4ca33ea98a941016a8d20fa
parent4d9d54a730434cc068dd3515ba6116697196f77b (diff)
drm/bridge: tc358767: fix initial DP0/1_SRCCTRL value
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
-rw-r--r--drivers/gpu/drm/bridge/tc358767.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index fee53422c31f..ab299f4debfa 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -836,12 +836,11 @@ 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) {