[PATCH 4/5] drm/panel-edp: Add Sharp LQ138P1JX61 (Surface Laptop 8th Ed.)

[Gopikrishna Garmidi]

The internal eDP panel of the Microsoft Surface Laptop 13.8" 8th Edition
is not in edp_panels[], so panel-edp falls back to conservative timings.

EDID, read over the panel's DP AUX DDC bus:

  00 ff ff ff ff ff ff 00 4d 10 72 15 a1 31 05 54
  31 23 01 04 b5 1d 13 78 03 7d 77 ad 50 46 ad 26
  0f 50 53 00 00 00 01 01 01 01 01 01 01 01 01 01
  01 01 01 01 01 01 60 b6 00 a0 90 00 2b 60 30 20
  3a 00 23 c2 10 00 00 18 60 b6 00 a0 90 00 56 66
  30 20 3a 00 23 c2 10 00 00 18 00 00 00 fd 00 18
  78 be be 2f 01 00 00 00 00 00 00 00 00 00 00 fc
  00 4c 51 31 33 38 50 31 4a 58 36 31 0a 20 01 4e

  02 03 0f 00 e3 05 80 00 e6 06 05 01 73 6a 0b 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 aa

  Manufacturer: SHP
  Model: 0x1572
  Made in: week 49 of 2025
  Display Product Name: 'LQ138P1JX61'
  DTD 1: 2304x1536 120.000329 Hz 3:2 (291 mm x 194 mm)
  DTD 2: 2304x1536  60.000164 Hz 3:2 (291 mm x 194 mm)

No datasheet is available, so use delay_200_500_e200: it keeps the
200 ms enable delay of the conservative fallback, but uses the 500 ms
unprepare delay of the real panels in the table. This matches the entry
for the closely related Sharp LQ120P1JX51 (SHP 0x15a7).

Assisted-by: LLM
Signed-off-by: Gopikrishna Garmidi <gopikrishna.garmidi@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/panel/panel-edp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 5d7d696b7725..3d002d75ad73 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -2198,6 +2198,7 @@ static const struct edp_panel_entry edp_panels[] = {
 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x1523, &delay_80_500_e50, "LQ140M1JW46"),
 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x153a, &delay_200_500_e50, "LQ140T1JH01"),
 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x154c, &delay_200_500_p2e100, "LQ116M1JW10"),
+	EDP_PANEL_ENTRY('S', 'H', 'P', 0x1572, &delay_200_500_e200, "LQ138P1JX61"),
 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x158f, &delay_200_500_p2e100, "LQ134Z1"),
 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x1593, &delay_200_500_p2e100, "LQ134N1"),
 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x15a7, &delay_200_500_e200, "LQ120P1JX51"),

-- 
2.34.1