drm/i915/icl: Power down DSI panel

This patch sends command and executes display off,
assert reset, power off VBT seqeuences to power
down DSI panel. Patch also adds high level function
to wrap all the panel sepcific programming during
DSI disabling.

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/efdafbf6b4d31123738b87b2d8264a9b5553eb32.1540900289.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index 644ad74759207cc63c1c187843e3992b50a80cf2..a7b1a9eae04be578d45b0dacbf328928c5630034 100644 (file)
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -800,6 +800,18 @@ static void gen11_dsi_disable_transcoder(struct intel_encoder *encoder)
        }
 }
 
+static void gen11_dsi_powerdown_panel(struct intel_encoder *encoder)
+{
+       struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+
+       intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF);
+       intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
+       intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
+
+       /* ensure cmds dispatched to panel */
+       wait_for_cmds_dispatched_to_panel(encoder);
+}
+
 static void __attribute__((unused)) gen11_dsi_disable(
                        struct intel_encoder *encoder,
                        const struct intel_crtc_state *old_crtc_state,
@@ -813,4 +825,7 @@ static void __attribute__((unused)) gen11_dsi_disable(
 
        /* step2d,e: disable transcoder and wait */
        gen11_dsi_disable_transcoder(encoder);
+
+       /* step2f,g: powerdown panel */
+       gen11_dsi_powerdown_panel(encoder);
 }