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 <zhouruihai@huaqin.corp-partner.google.com>
Change-Id: Ifdcaf0e34753fc906817c763f1c8e7389448d1dc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76766
Reviewed-by: cong yang <yangcong5@huaqin.corp-partner.google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
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),
},
};