[PATCH 5/5] drm/panel: st7703: Drive XBD599 panel at higher clock rate

Frank Oltmanns
2023-12-18T13:36:21Z

This panel is used in the pinephone that runs on a Allwinner A64 SOC.
Acoording to it's datasheet, the SOC requires PLL-MIPI to run at more
than 500 MHz.

Therefore, change [hv]sync_(start|end) so that we reach a clock rate
that is high enough to drive PLL-MIPI within its limits.

Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
---
drivers/gpu/drm/panel/panel-sitronix-st7703.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
index b55bafd1a8be..6886fd7f765e 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
@@ -320,14 +320,14 @@ static int xbd599_init_sequence(struct st7703 *ctx)

static const struct drm_display_mode xbd599_mode = {
.hdisplay = 720,
- .hsync_start = 720 + 40,
- .hsync_end = 720 + 40 + 40,
- .htotal = 720 + 40 + 40 + 40,
+ .hsync_start = 720 + 65,
+ .hsync_end = 720 + 65 + 65,
+ .htotal = 720 + 65 + 65 + 65,
.vdisplay = 1440,
- .vsync_start = 1440 + 18,
- .vsync_end = 1440 + 18 + 10,
- .vtotal = 1440 + 18 + 10 + 17,
- .clock = 69000,
+ .vsync_start = 1440 + 30,
+ .vsync_end = 1440 + 30 + 22,
+ .vtotal = 1440 + 30 + 22 + 29,
+ .clock = (720 + 65 + 65 + 65) * (1440 + 30 + 22 + 29) * 60 / 1000,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 68,
.height_mm = 136,

--
2.43.0