[PATCH 2/9] drm/panel/panel-sitronix-st7701: Enable DSI burst mode, LPM, non-continuous clock

Marek Vasut marex at denx.de
Sun Jul 10 19:44:30 UTC 2022


The ST7701(S) is capable of DSI burst mode, which is more energy
efficient than the non-burst modes. Make use of it.

The ST7701(S) is capable of DSI non-continuous clock, since it
sources the TFT matrix driver clock from internal clock source.
The DSI non-continuous clock further reduce power utilization.

The ST7701(S) uses DSI LPM for command transmissions, make sure
this is configured correctly in the DSI mode flags.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Guido Günther <agx at sigxcpu.org>
Cc: Jagan Teki <jagan at amarulasolutions.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Linus Walleij <linus.walleij at linaro.org>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Thierry Reding <thierry.reding at gmail.com>
---
 drivers/gpu/drm/panel/panel-sitronix-st7701.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
index 90b0e90eb6e2..fe9f1d2fcf44 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
@@ -334,7 +334,8 @@ static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
 		return -ENOMEM;
 
 	desc = of_device_get_match_data(&dsi->dev);
-	dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+			  MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
 	dsi->format = desc->format;
 	dsi->lanes = desc->lanes;
 
-- 
2.35.1



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