[XS] Change in coreboot[main]: mb/google/corsola: Increase ANX7625 data trail time

[Yidi Lin (Code Review)]

Yidi Lin has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86101?usp=email )

(

4 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: mb/google/corsola: Increase ANX7625 data trail time
......................................................................

mb/google/corsola: Increase ANX7625 data trail time

Currently, the eDP panel has display shift issue. This issue
is caused by too short HS-trail time.

Based on hardware design ANX7625 requires more HS-trail time to
finish mipi data packet decoding before entering LP mode.
So increase HS-trail time to avoid effect of entering LP mode.

da_hs_trail value copy from "kukui/panel_anx7625.c", verified
on corsola.

BUG=b:391304679
BRANCH=corsola
TEST=Display is normal on corsola

Change-Id: I677667240c7f3b0e14c6a728931921e32f539c57
Signed-off-by: Xin Ji 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86101
Reviewed-by: Yu-Ping Wu 
Tested-by: build bot (Jenkins) 
Reviewed-by: Paul Menzel 
Reviewed-by: Yidi Lin 
---
M src/mainboard/google/corsola/panel_anx7625.c
1 file changed, 6 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Paul Menzel: Looks good to me, but someone else must approve
  Yu-Ping Wu: Looks good to me, approved
  Yidi Lin: Looks good to me, approved

diff --git a/src/mainboard/google/corsola/panel_anx7625.c b/src/mainboard/google/corsola/panel_anx7625.c
index 193a501..048713f 100644
--- a/src/mainboard/google/corsola/panel_anx7625.c
+++ b/src/mainboard/google/corsola/panel_anx7625.c
@@ -5,6 +5,7 @@
 #include <drivers/analogix/anx7625/anx7625.h>
 #include <edid.h>
 #include <gpio.h>
+#include <soc/dsi.h>
 #include <soc/i2c.h>

#include "gpio.h"
@@ -62,3 +63,8 @@
    mtk_i2c_bus_init(BRIDGE_I2C, I2C_SPEED_FAST);
    return &anx7625_bridge;
 }
+
+void mtk_dsi_override_phy_timing(struct mtk_phy_timing *timing)
+{
+	timing->da_hs_trail += 9;
+}