diff mbox series

[2/9,SRU,L,OEM-6.1] drm/i915: Do panel VBT init early if the VBT declares an explicit panel type

Message ID 20230110101755.1107104-3-acelan.kao@canonical.com
State New
Headers show
Series Lost display on built-in monitor after suspend | expand

Commit Message

AceLan Kao Jan. 10, 2023, 10:17 a.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

BugLink: https://launchpad.net/bugs/2001599

Lots of ADL machines out there with bogus VBTs that declare
two eDP child devices. In order for those to work we need to
figure out which power sequencer to use before we try the EDID
read. So let's do the panel VBT init early if we can, falling
back to the post-EDID init otherwise.

The post-EDID init panel_type=0xff approach of assuming the
power sequencer should already be enabled doesn't really work
with multiple eDP panels, and currently we just end up using
the same power sequencer for both eDP ports, which at least
confuses the wakeref tracking, and potentially also causes us
to toggle the VDD for the panel when we should not.

Cc: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-3-ville.syrjala@linux.intel.com
(cherry picked from commit 3f9ffce5765d68775163b8b134c4d7f156b48eec drm-tip)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
---
 drivers/gpu/drm/i915/display/icl_dsi.c        |  2 +-
 drivers/gpu/drm/i915/display/intel_bios.c     | 56 ++++++++++++++-----
 drivers/gpu/drm/i915/display/intel_bios.h     | 11 ++--
 .../drm/i915/display/intel_display_types.h    |  2 +-
 drivers/gpu/drm/i915/display/intel_dp.c       |  7 ++-
 drivers/gpu/drm/i915/display/intel_lvds.c     |  4 +-
 drivers/gpu/drm/i915/display/intel_panel.c    |  1 +
 drivers/gpu/drm/i915/display/intel_sdvo.c     |  2 +-
 drivers/gpu/drm/i915/display/vlv_dsi.c        |  2 +-
 9 files changed, 61 insertions(+), 26 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index ed4d93942dbd2..34b3ff967a272 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -2053,7 +2053,7 @@  void icl_dsi_init(struct drm_i915_private *dev_priv)
 	/* attach connector to encoder */
 	intel_connector_attach_encoder(intel_connector, encoder);
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL, NULL);
+	intel_bios_init_panel_late(dev_priv, &intel_connector->panel, NULL, NULL);
 
 	mutex_lock(&dev->mode_config.mutex);
 	intel_panel_add_vbt_lfp_fixed_mode(intel_connector);
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 28bdb936cd1fc..987156276f11b 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -620,14 +620,14 @@  static void dump_pnp_id(struct drm_i915_private *i915,
 
 static int opregion_get_panel_type(struct drm_i915_private *i915,
 				   const struct intel_bios_encoder_data *devdata,
-				   const struct edid *edid)
+				   const struct edid *edid, bool use_fallback)
 {
 	return intel_opregion_get_panel_type(i915);
 }
 
 static int vbt_get_panel_type(struct drm_i915_private *i915,
 			      const struct intel_bios_encoder_data *devdata,
-			      const struct edid *edid)
+			      const struct edid *edid, bool use_fallback)
 {
 	const struct bdb_lvds_options *lvds_options;
 
@@ -652,7 +652,7 @@  static int vbt_get_panel_type(struct drm_i915_private *i915,
 
 static int pnpid_get_panel_type(struct drm_i915_private *i915,
 				const struct intel_bios_encoder_data *devdata,
-				const struct edid *edid)
+				const struct edid *edid, bool use_fallback)
 {
 	const struct bdb_lvds_lfp_data *data;
 	const struct bdb_lvds_lfp_data_ptrs *ptrs;
@@ -701,9 +701,9 @@  static int pnpid_get_panel_type(struct drm_i915_private *i915,
 
 static int fallback_get_panel_type(struct drm_i915_private *i915,
 				   const struct intel_bios_encoder_data *devdata,
-				   const struct edid *edid)
+				   const struct edid *edid, bool use_fallback)
 {
-	return 0;
+	return use_fallback ? 0 : -1;
 }
 
 enum panel_type {
@@ -715,13 +715,13 @@  enum panel_type {
 
 static int get_panel_type(struct drm_i915_private *i915,
 			  const struct intel_bios_encoder_data *devdata,
-			  const struct edid *edid)
+			  const struct edid *edid, bool use_fallback)
 {
 	struct {
 		const char *name;
 		int (*get_panel_type)(struct drm_i915_private *i915,
 				      const struct intel_bios_encoder_data *devdata,
-				      const struct edid *edid);
+				      const struct edid *edid, bool use_fallback);
 		int panel_type;
 	} panel_types[] = {
 		[PANEL_TYPE_OPREGION] = {
@@ -744,7 +744,8 @@  static int get_panel_type(struct drm_i915_private *i915,
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(panel_types); i++) {
-		panel_types[i].panel_type = panel_types[i].get_panel_type(i915, devdata, edid);
+		panel_types[i].panel_type = panel_types[i].get_panel_type(i915, devdata,
+									  edid, use_fallback);
 
 		drm_WARN_ON(&i915->drm, panel_types[i].panel_type > 0xf &&
 			    panel_types[i].panel_type != 0xff);
@@ -3175,14 +3176,26 @@  void intel_bios_init(struct drm_i915_private *i915)
 	kfree(oprom_vbt);
 }
 
-void intel_bios_init_panel(struct drm_i915_private *i915,
-			   struct intel_panel *panel,
-			   const struct intel_bios_encoder_data *devdata,
-			   const struct edid *edid)
+static void intel_bios_init_panel(struct drm_i915_private *i915,
+				  struct intel_panel *panel,
+				  const struct intel_bios_encoder_data *devdata,
+				  const struct edid *edid,
+				  bool use_fallback)
 {
-	init_vbt_panel_defaults(panel);
+	/* already have it? */
+	if (panel->vbt.panel_type >= 0) {
+		drm_WARN_ON(&i915->drm, !use_fallback);
+		return;
+	}
 
-	panel->vbt.panel_type = get_panel_type(i915, devdata, edid);
+	panel->vbt.panel_type = get_panel_type(i915, devdata,
+					       edid, use_fallback);
+	if (panel->vbt.panel_type < 0) {
+		drm_WARN_ON(&i915->drm, use_fallback);
+		return;
+	}
+
+	init_vbt_panel_defaults(panel);
 
 	parse_panel_options(i915, panel);
 	parse_generic_dtd(i915, panel);
@@ -3197,6 +3210,21 @@  void intel_bios_init_panel(struct drm_i915_private *i915,
 	parse_mipi_sequence(i915, panel);
 }
 
+void intel_bios_init_panel_early(struct drm_i915_private *i915,
+				 struct intel_panel *panel,
+				 const struct intel_bios_encoder_data *devdata)
+{
+	intel_bios_init_panel(i915, panel, devdata, NULL, false);
+}
+
+void intel_bios_init_panel_late(struct drm_i915_private *i915,
+				struct intel_panel *panel,
+				const struct intel_bios_encoder_data *devdata,
+				const struct edid *edid)
+{
+	intel_bios_init_panel(i915, panel, devdata, edid, true);
+}
+
 /**
  * intel_bios_driver_remove - Free any resources allocated by intel_bios_init()
  * @i915: i915 device instance
diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h
index e375405a78284..ff1fdd2e0c1c5 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.h
+++ b/drivers/gpu/drm/i915/display/intel_bios.h
@@ -232,10 +232,13 @@  struct mipi_pps_data {
 } __packed;
 
 void intel_bios_init(struct drm_i915_private *dev_priv);
-void intel_bios_init_panel(struct drm_i915_private *dev_priv,
-			   struct intel_panel *panel,
-			   const struct intel_bios_encoder_data *devdata,
-			   const struct edid *edid);
+void intel_bios_init_panel_early(struct drm_i915_private *dev_priv,
+				 struct intel_panel *panel,
+				 const struct intel_bios_encoder_data *devdata);
+void intel_bios_init_panel_late(struct drm_i915_private *dev_priv,
+				struct intel_panel *panel,
+				const struct intel_bios_encoder_data *devdata,
+				const struct edid *edid);
 void intel_bios_fini_panel(struct intel_panel *panel);
 void intel_bios_driver_remove(struct drm_i915_private *dev_priv);
 bool intel_bios_is_valid_vbt(const void *buf, size_t size);
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 298d00a11f473..135dbcab62b28 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -291,7 +291,7 @@  struct intel_vbt_panel_data {
 	struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */
 
 	/* Feature bits */
-	unsigned int panel_type:4;
+	int panel_type;
 	unsigned int lvds_dither:1;
 	unsigned int bios_lvds_val; /* initial [PCH_]LVDS reg val in VBIOS */
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 2b5bc95a8b0df..d0375a964fc14 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5238,6 +5238,9 @@  static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 		return false;
 	}
 
+	intel_bios_init_panel_early(dev_priv, &intel_connector->panel,
+				    encoder->devdata);
+
 	intel_pps_init(intel_dp);
 
 	/* Cache DPCD and EDID for edp. */
@@ -5272,8 +5275,8 @@  static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	}
 	intel_connector->edid = edid;
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel,
-			      encoder->devdata, IS_ERR(edid) ? NULL : edid);
+	intel_bios_init_panel_late(dev_priv, &intel_connector->panel,
+				   encoder->devdata, IS_ERR(edid) ? NULL : edid);
 
 	intel_panel_add_edid_fixed_modes(intel_connector,
 					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE ||
diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c
index e5352239b2a2f..a749a5a66d624 100644
--- a/drivers/gpu/drm/i915/display/intel_lvds.c
+++ b/drivers/gpu/drm/i915/display/intel_lvds.c
@@ -967,8 +967,8 @@  void intel_lvds_init(struct drm_i915_private *dev_priv)
 	}
 	intel_connector->edid = edid;
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL,
-			      IS_ERR(edid) ? NULL : edid);
+	intel_bios_init_panel_late(dev_priv, &intel_connector->panel, NULL,
+				   IS_ERR(edid) ? NULL : edid);
 
 	/* Try EDID first */
 	intel_panel_add_edid_fixed_modes(intel_connector,
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 8d48e3ac44342..2b2d93ebbe40d 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -651,6 +651,7 @@  void intel_panel_init_alloc(struct intel_connector *connector)
 {
 	struct intel_panel *panel = &connector->panel;
 
+	connector->panel.vbt.panel_type = -1;
 	INIT_LIST_HEAD(&panel->fixed_modes);
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c
index 774c1dc31a521..a15e09b551708 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -2891,7 +2891,7 @@  intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 	if (!intel_sdvo_create_enhance_property(intel_sdvo, intel_sdvo_connector))
 		goto err;
 
-	intel_bios_init_panel(i915, &intel_connector->panel, NULL, NULL);
+	intel_bios_init_panel_late(i915, &intel_connector->panel, NULL, NULL);
 
 	/*
 	 * Fetch modes from VBT. For SDVO prefer the VBT mode since some
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c
index b3f5ca280ef26..90e3e41095b34 100644
--- a/drivers/gpu/drm/i915/display/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/display/vlv_dsi.c
@@ -1925,7 +1925,7 @@  void vlv_dsi_init(struct drm_i915_private *dev_priv)
 
 	intel_dsi->panel_power_off_time = ktime_get_boottime();
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL, NULL);
+	intel_bios_init_panel_late(dev_priv, &intel_connector->panel, NULL, NULL);
 
 	if (intel_connector->panel.vbt.dsi.config->dual_link)
 		intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);