[PATCH 9/9] drm/i915/bxt: Fix the DSI enable sequence

[Vidya Srinivas <vidya.srinivas@xxxxxxxxx>]

From: Uma Shankar <uma.shankar@xxxxxxxxx>

Device ready to be done after panel power on and before
sending the OTP commands. Patch fixes the enable sequence
as per this.

Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_dsi.c           | 12 ++++++++++++
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c |  4 +---
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 60ca0b9..ac02fd8 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -568,6 +568,12 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder,
 
 	intel_dsi_prepare(encoder, pipe_config);
 
+	if (IS_BROXTON(dev_priv)) {
+		/* Panel Enable */
+		drm_panel_power_on(intel_dsi->panel);
+		msleep(intel_dsi->panel_on_delay);
+	}
+
 	/* Panel Enable over CRC PMIC */
 	if (intel_dsi->gpio_panel)
 		gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
@@ -586,6 +592,12 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder,
 	/* put device in ready state */
 	intel_dsi_device_ready(encoder);
 
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		/* Panel Enable */
+		drm_panel_power_on(intel_dsi->panel);
+		msleep(intel_dsi->panel_on_delay);
+	}
+
 	drm_panel_prepare(intel_dsi->panel);
 
 	for_each_dsi_port(port, intel_dsi->ports)
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 4279279..aa73d22 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -493,9 +493,6 @@ static void generic_exec_sequence(struct drm_panel *panel, enum mipi_seq seq_id)
 
 static int vbt_panel_prepare(struct drm_panel *panel)
 {
-	generic_exec_sequence(panel, MIPI_SEQ_ASSERT_RESET);
-	generic_exec_sequence(panel, MIPI_SEQ_POWER_ON);
-	generic_exec_sequence(panel, MIPI_SEQ_DEASSERT_RESET);
 	generic_exec_sequence(panel, MIPI_SEQ_INIT_OTP);
 
 	return 0;
@@ -550,6 +547,7 @@ static int vbt_panel_get_modes(struct drm_panel *panel)
 static int vbt_panel_power_on(struct drm_panel *panel)
 {
 	generic_exec_sequence(panel, MIPI_SEQ_POWER_ON);
+	generic_exec_sequence(panel, MIPI_SEQ_ASSERT_RESET);
 	return 0;
 }
 
-- 
1.9.1

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