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Subject[PATCH v6 10/13] drm/panel: st7703: Enter sleep after display off
Date
The datasheet suggests to issue sleep in after display off
as a part of the panel's shutdown sequence.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpu/drm/panel/panel-sitronix-st7703.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
index 5cd5503f894f..0c4167994d01 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
@@ -395,8 +395,19 @@ static int st7703_disable(struct drm_panel *panel)
{
struct st7703 *ctx = panel_to_st7703(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ int ret;
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0)
+ DRM_DEV_ERROR(ctx->dev,
+ "Failed to turn off the display: %d\n", ret);

- return mipi_dsi_dcs_set_display_off(dsi);
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0)
+ DRM_DEV_ERROR(ctx->dev,
+ "Failed to enter sleep mode: %d\n", ret);
+
+ return 0;
}

static int st7703_unprepare(struct drm_panel *panel)
--
2.27.0
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