[PATCH] drm/client: Detect when ACPI lid is closed during initialization

[Mario Limonciello]

If the lid on a laptop is closed when eDP connectors are populated
then it remains enabled when the initial framebuffer configuration
is built.

When creating the initial framebuffer configuration detect the ACPI
lid status and if it's closed disable any eDP connectors.

Suggested-by: Alex Deucher <alexander.deucher at amd.com>
Reported-by: Chris Bainbridge <chris.bainbridge at gmail.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3349
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/drm_client_modeset.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
index 31af5cf37a09..b76438c31761 100644
--- a/drivers/gpu/drm/drm_client_modeset.c
+++ b/drivers/gpu/drm/drm_client_modeset.c
@@ -8,6 +8,7 @@
  */
 
 #include "drm/drm_modeset_lock.h"
+#include <acpi/button.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
@@ -257,6 +258,27 @@ static void drm_client_connectors_enabled(struct drm_connector **connectors,
 		enabled[i] = drm_connector_enabled(connectors[i], false);
 }
 
+static void drm_client_match_edp_lid(struct drm_device *dev,
+				     struct drm_connector **connectors,
+				     unsigned int connector_count,
+				     bool *enabled)
+{
+	int i;
+
+	for (i = 0; i < connector_count; i++) {
+		struct drm_connector *connector = connectors[i];
+
+		if (connector->connector_type != DRM_MODE_CONNECTOR_eDP || !enabled[i])
+			continue;
+
+		if (!acpi_lid_open()) {
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] lid is closed, disabling\n",
+				    connector->base.id, connector->name);
+			enabled[i] = false;
+		}
+	}
+}
+
 static bool drm_client_target_cloned(struct drm_device *dev,
 				     struct drm_connector **connectors,
 				     unsigned int connector_count,
@@ -844,6 +866,7 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
 		memset(crtcs, 0, connector_count * sizeof(*crtcs));
 		memset(offsets, 0, connector_count * sizeof(*offsets));
 
+		drm_client_match_edp_lid(dev, connectors, connector_count, enabled);
 		if (!drm_client_target_cloned(dev, connectors, connector_count, modes,
 					      offsets, enabled, width, height) &&
 		    !drm_client_target_preferred(dev, connectors, connector_count, modes,
-- 
2.43.0