[PATCH 2/2] drm/i915: Add functions to execute the new sequences from VBT

[Deepak M]

From: Gaurav K Singh <gaurav.k.singh at intel.com>

New sequences are added in the mipi sequence block of the
VBT from version 3 onwards. The sequences are added to
make the code more generic as the panel related info
are placed in the VBT.

Cc: David Airlie <airlied at linux.ie>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
Signed-off-by: Deepak M <m.deepak at intel.com>
---
 drivers/gpu/drm/i915/intel_dsi.c           |  8 ++++++++
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 32 ++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index b928c50..82f6822 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -461,6 +461,8 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
 		intel_dsi_port_enable(encoder);
 	}
 
+	drm_panel_backlight_on(intel_dsi->panel);
+
 	intel_panel_enable_backlight(intel_dsi->attached_connector);
 }
 
@@ -485,6 +487,8 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
 	if (intel_dsi->gpio_panel)
 		gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
 
+	/* Panel Enable */
+	drm_panel_power_on(intel_dsi->panel);
 	msleep(intel_dsi->panel_on_delay);
 
 	if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
@@ -537,6 +541,7 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder)
 	DRM_DEBUG_KMS("\n");
 
 	intel_panel_disable_backlight(intel_dsi->attached_connector);
+	drm_panel_backlight_off(intel_dsi->panel);
 
 	if (is_vid_mode(intel_dsi)) {
 		/* Send Shutdown command to the panel in LP mode */
@@ -651,6 +656,9 @@ static void intel_dsi_post_disable(struct intel_encoder *encoder)
 
 	drm_panel_unprepare(intel_dsi->panel);
 
+	/* Disable Panel */
+	drm_panel_power_off(intel_dsi->panel);
+
 	msleep(intel_dsi->panel_off_delay);
 	msleep(intel_dsi->panel_pwr_cycle_delay);
 
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 787f01c..01a2743 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -404,12 +404,44 @@ static int vbt_panel_get_modes(struct drm_panel *panel)
 	return 1;
 }
 
+static int vbt_panel_power_on(struct drm_panel *panel)
+{
+	generic_exec_sequence(panel, MIPI_SEQ_POWER_ON);
+
+	return 0;
+}
+
+static int vbt_panel_power_off(struct drm_panel *panel)
+{
+	generic_exec_sequence(panel, MIPI_SEQ_POWER_OFF);
+
+	return 0;
+}
+
+static int vbt_panel_backlight_on(struct drm_panel *panel)
+{
+	generic_exec_sequence(panel, MIPI_SEQ_BACKLIGHT_ON);
+
+	return 0;
+}
+
+static int vbt_panel_backlight_off(struct drm_panel *panel)
+{
+	generic_exec_sequence(panel, MIPI_SEQ_BACKLIGHT_OFF);
+
+	return 0;
+}
+
 static const struct drm_panel_funcs vbt_panel_funcs = {
 	.disable = vbt_panel_disable,
 	.unprepare = vbt_panel_unprepare,
 	.prepare = vbt_panel_prepare,
 	.enable = vbt_panel_enable,
 	.get_modes = vbt_panel_get_modes,
+	.power_on = vbt_panel_power_on,
+	.power_off = vbt_panel_power_off,
+	.backlight_on = vbt_panel_backlight_on,
+	.backlight_off = vbt_panel_backlight_off,
 };
 
 struct drm_panel *vbt_panel_init(struct intel_dsi *intel_dsi, u16 panel_id)
-- 
1.9.1