[PATCH v3] drm/i915/panel: register drm_panel and call prepare/unprepare for eDP

[Arun R Murthy <arun.r.murthy@intel.com>]

Allocate and register drm_panel to allow the panel_follower framework to
detect the eDP panel and pass drm_connector::kdev device to drm_panel
allocation for matching.
Call drm_panel_prepare/unprepare in ddi_enable for eDP to allow the
followers to get notified of the panel power state changes.

Note: This is for eDP with DDI platforms only.

v2: remove backlight setup from panel_register (Jani)
v3: Updated the commit message (Jani)

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c   | 4 ++++
 drivers/gpu/drm/i915/display/intel_panel.c | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index cbd1060e966431e0884aa9df7b5e6d2f27fde6d5..36aa6d14589d37614fe13ba15baf4c7e60014e2c 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -73,6 +73,7 @@
 #include "intel_lspcon.h"
 #include "intel_mg_phy_regs.h"
 #include "intel_modeset_lock.h"
+#include "intel_panel.h"
 #include "intel_pfit.h"
 #include "intel_pps.h"
 #include "intel_psr.h"
@@ -3355,6 +3356,8 @@ static void intel_ddi_enable_dp(struct intel_atomic_state *state,
 	drm_connector_update_privacy_screen(conn_state);
 	intel_edp_backlight_on(crtc_state, conn_state);
 
+	intel_panel_prepare(crtc_state, conn_state);
+
 	if (!intel_lspcon_active(dig_port) || intel_dp_has_hdmi_sink(&dig_port->dp))
 		intel_dp_set_infoframes(encoder, true, crtc_state, conn_state);
 
@@ -3552,6 +3555,7 @@ static void intel_ddi_disable_dp(struct intel_atomic_state *state,
 
 	intel_dp->link.active = false;
 
+	intel_panel_unprepare(old_conn_state);
 	intel_psr_disable(intel_dp, old_crtc_state);
 	intel_alpm_disable(intel_dp);
 	intel_edp_backlight_off(old_conn_state);
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index e28ad72c4f2b2d777de698e6e8f1b365f6603e92..2a20aaaaac39b788759d604976ebee3635205cea 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -515,7 +515,8 @@ int intel_panel_register(struct intel_connector *connector)
 	if (ret)
 		return ret;
 
-	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) {
+	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI ||
+	    connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
 		struct device *dev = connector->base.kdev;
 		struct drm_panel *base;
 

---
base-commit: da56936fad6f5e1d5f0cef8b50277bfb071eefe7
change-id: 20250624-edp_panel-a87d76bb41bd

Best regards,
-- 
Arun R Murthy <arun.r.murthy@intel.com>