[XS] Change in coreboot[master]: drivers/mipi: sta_ili9882t: Change TReset-CMD from 1.1 ms to 20 ms

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/76766?usp=email )

(

3 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: drivers/mipi: sta_ili9882t: Change TReset-CMD from 1.1 ms to 20 ms
......................................................................

drivers/mipi: sta_ili9882t: Change TReset-CMD from 1.1 ms to 20 ms

In the datasheet of ILI9882T [1] section 3.11 Power On/Off Sequence,
the TReset-CMD (Reset to First Command in Display Sleep In Mode) should
be larger than 10ms, but it's 1.1ms now. This may cause abnormal
display as some commands may be lost during power on. Fix this and
leave some margins by increasing TReset-CMD to 20ms. Also, to align
with the kernel driver structure starry_ili9882t_init_cmd, add 20ms
delay at the end of command.

[1] ILI9882T_Datasheet_20220428.pdf

BUG=b:293380212
TEST=Boot and display normally

Signed-off-by: Ruihai Zhou 
Change-Id: Ifdcaf0e34753fc906817c763f1c8e7389448d1dc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76766
Reviewed-by: cong yang 
Reviewed-by: Eric Lai 
Reviewed-by: Yidi Lin 
Tested-by: build bot (Jenkins) 
Reviewed-by: Yu-Ping Wu 
---
M src/drivers/mipi/panel-STA_ILI9882T.c
1 file changed, 2 insertions(+), 0 deletions(-)

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

diff --git a/src/drivers/mipi/panel-STA_ILI9882T.c b/src/drivers/mipi/panel-STA_ILI9882T.c
index 51f01e5..2514642 100644
--- a/src/drivers/mipi/panel-STA_ILI9882T.c
+++ b/src/drivers/mipi/panel-STA_ILI9882T.c
@@ -19,6 +19,7 @@
    	},
    },
    .init = {
+		PANEL_DELAY(20),
    	PANEL_DCS(0xFF, 0x98, 0x82, 0x01),
    	PANEL_DCS(0x00, 0x42),
    	PANEL_DCS(0x01, 0x11),
@@ -325,5 +326,6 @@
    	PANEL_DCS(0x11),
    	PANEL_DELAY(120),
    	PANEL_DCS(0x29),
+		PANEL_DELAY(20),
    },
 };