[Intel-gfx] [PATCH 4/9] drm/i915: Add DSI panel power on/off sequence callbacks

[Vidya Srinivas]

From: Uma Shankar <uma.shankar at intel.com>

Panel Power On/Off sequences are part of Panel spec.
These are present in VBT v3 of the Intel VBT spec.
Some DSI controller/panels require making SOC specific
device ready changes in between the panel power ON and
sending the OTP sequences.

This patch introduces panel power on callbacks to decouple
panel power ON and OTP.

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
---
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 8f683b8..4279279 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -547,10 +547,24 @@ 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 const struct drm_panel_funcs vbt_panel_funcs = {
 	.disable = vbt_panel_disable,
 	.unprepare = vbt_panel_unprepare,
 	.prepare = vbt_panel_prepare,
+	.power_on = vbt_panel_power_on,
+	.power_off = vbt_panel_power_off,
 	.enable = vbt_panel_enable,
 	.get_modes = vbt_panel_get_modes,
 };
-- 
1.9.1