[RFCv1 28/42] drm/dsi: add MIPI_DSI_MODE_ULPS_IDLE

[Sebastian Reichel]

DSI command mode panels are self-refreshing displays, that
can be updated very rarely for static images. For this kind
of scenario some panels support, that the DSI bus switches
into ULPS mode until the panel needs to be refreshed.

This is problematic on some panels, so introduce a flag to
signal the DSI host implementation that the panel allows
going into ULPS mode.

Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
 include/drm/drm_mipi_dsi.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 13cf2ae59f6c..5f2e3e6fb013 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -131,6 +131,8 @@ struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node);
 #define MIPI_DSI_CLOCK_NON_CONTINUOUS	BIT(10)
 /* transmit data in low power */
 #define MIPI_DSI_MODE_LPM		BIT(11)
+/* allow going into ULPS mode while command mode panel is not updated */
+#define MIPI_DSI_MODE_ULPS_IDLE		BIT(12)
 
 enum mipi_dsi_pixel_format {
 	MIPI_DSI_FMT_RGB888,
-- 
2.24.0