In Video Mode, if DSI transcoder is set to transmit packets in LP Escape mode, screen flickering would be obseved when brightness commands are continuously and quickly transmitted to a panel.
The problem may be resolved by changing the mode to transmit packets from Low Power to HS. Cc: Ville Syrjala <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Vandita Kulkarni <[email protected]> Cc: Lee Shawn C <[email protected]> Cc: Cooper Chiou <[email protected]> Signed-off-by: William Tseng <[email protected]> --- drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c b/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c index f61ed82e8867..2f788cb0f597 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c @@ -81,8 +81,10 @@ static void dcs_set_backlight(const struct drm_connector_state *conn_state, u32 for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) { dsi_device = intel_dsi->dsi_hosts[port]->device; + dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM; mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, &data, len); + dsi_device->mode_flags |= MIPI_DSI_MODE_LPM; } } -- 2.17.1
