[Intel-gfx] [PATCH 02/14] drm/i915: Add support for TEAR ON Sequence

[Gaurav K Singh]

For command mode panel, panel's fb enabling and tearing configuration
is done as part of TEAR ON sequence. This patch parses and executes
TEAR ON sequence for MIPI command mode.

Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_bios.h          |    2 ++
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c |    9 ++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index 1b7417e..d7fdb10 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -948,6 +948,8 @@ enum mipi_seq {
 	MIPI_SEQ_DISPLAY_ON,
 	MIPI_SEQ_DISPLAY_OFF,
 	MIPI_SEQ_DEASSERT_RESET,
+	MIPI_SEQ_TEAR_ON,
+	MIPI_SEQ_TEAR_OFF,
 	MIPI_SEQ_MAX
 };
 
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index feeca59..cacd5b8 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -251,7 +251,9 @@ static const char * const seq_name[] = {
 	"MIPI_SEQ_INIT_OTP",
 	"MIPI_SEQ_DISPLAY_ON",
 	"MIPI_SEQ_DISPLAY_OFF",
-	"MIPI_SEQ_DEASSERT_RESET"
+	"MIPI_SEQ_DEASSERT_RESET",
+	"MIPI_SEQ_TEAR_ON",
+	"MIPI_SEQ_TEAR_OFF"
 };
 
 static void generic_exec_sequence(struct intel_dsi *intel_dsi, const u8 *data)
@@ -320,6 +322,11 @@ static int vbt_panel_prepare(struct drm_panel *panel)
 	sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
 	generic_exec_sequence(intel_dsi, sequence);
 
+	if (intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE) {
+		sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_TEAR_ON];
+		generic_exec_sequence(intel_dsi, sequence);
+	}
+
 	return 0;
 }
 
-- 
1.7.9.5