Merge tag 'drm-msm-fixes-2023-06-08' of https://gitlab.freedesktop.org/drm/msm into drm-fixes

A few more late fixes for v6.4-rc6

+ Fix max segment size to address splat on newer a6xx
+ Disable PSR by default w/ modparam to re-enable, since there
  still seems to be a lingering issue
+ Fix HPD issue
+ Fix issue with unitialized GMU mutex
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGufjVZRNT6YfQ7YUXFC7Cz95wdLF7QHAYkiGfp+3Xc3DQ@mail.gmail.com

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

@@ -1526,8 +1526,6 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
 	if (!pdev)
 		return -ENODEV;
 
-	mutex_init(&gmu->lock);
-
 	gmu->dev = &pdev->dev;
 
 	of_dma_configure(gmu->dev, node, true);

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -1981,6 +1981,8 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	adreno_gpu = &a6xx_gpu->base;
 	gpu = &adreno_gpu->base;
 
+	mutex_init(&a6xx_gpu->gmu.lock);
+
 	adreno_gpu->registers = NULL;
 
 	/*

drivers/gpu/drm/msm/dp/dp_catalog.c

@@ -620,7 +620,7 @@ void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog,
 				config & DP_DP_HPD_INT_MASK);
 }
 
-void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog)
+void dp_catalog_ctrl_hpd_enable(struct dp_catalog *dp_catalog)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
@@ -635,6 +635,19 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog)
 	dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN);
 }
 
+void dp_catalog_ctrl_hpd_disable(struct dp_catalog *dp_catalog)
+{
+	struct dp_catalog_private *catalog = container_of(dp_catalog,
+				struct dp_catalog_private, dp_catalog);
+
+	u32 reftimer = dp_read_aux(catalog, REG_DP_DP_HPD_REFTIMER);
+
+	reftimer &= ~DP_DP_HPD_REFTIMER_ENABLE;
+	dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer);
+
+	dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, 0);
+}
+
 static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog)
 {
 	/* trigger sdp */

drivers/gpu/drm/msm/dp/dp_catalog.h

@@ -104,7 +104,8 @@ bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable);
 void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog,
 			u32 intr_mask, bool en);
-void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog);
+void dp_catalog_ctrl_hpd_enable(struct dp_catalog *dp_catalog);
+void dp_catalog_ctrl_hpd_disable(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter);
 u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog);

drivers/gpu/drm/msm/dp/dp_display.c

@@ -28,6 +28,10 @@
 #include "dp_audio.h"
 #include "dp_debug.h"
 
+static bool psr_enabled = false;
+module_param(psr_enabled, bool, 0);
+MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays");
+
 #define HPD_STRING_SIZE 30
 
 enum {
@@ -407,7 +411,7 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp)
 
 	edid = dp->panel->edid;
 
-	dp->dp_display.psr_supported = dp->panel->psr_cap.version;
+	dp->dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
 
 	dp->audio_supported = drm_detect_monitor_audio(edid);
 	dp_panel_handle_sink_request(dp->panel);
@@ -616,12 +620,6 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 		dp->hpd_state = ST_MAINLINK_READY;
 	}
 
-	/* enable HDP irq_hpd/replug interrupt */
-	if (dp->dp_display.internal_hpd)
-		dp_catalog_hpd_config_intr(dp->catalog,
-					   DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK,
-					   true);
-
 	drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 			dp->dp_display.connector_type, state);
 	mutex_unlock(&dp->event_mutex);
@@ -659,12 +657,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 	drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 			dp->dp_display.connector_type, state);
 
-	/* disable irq_hpd/replug interrupts */
-	if (dp->dp_display.internal_hpd)
-		dp_catalog_hpd_config_intr(dp->catalog,
-					   DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK,
-					   false);
-
 	/* unplugged, no more irq_hpd handle */
 	dp_del_event(dp, EV_IRQ_HPD_INT);
 
@@ -688,10 +680,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 		return 0;
 	}
 
-	/* disable HPD plug interrupts */
-	if (dp->dp_display.internal_hpd)
-		dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
-
 	/*
 	 * We don't need separate work for disconnect as
 	 * connect/attention interrupts are disabled
@@ -707,10 +695,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 	/* signal the disconnect event early to ensure proper teardown */
 	dp_display_handle_plugged_change(&dp->dp_display, false);
 
-	/* enable HDP plug interrupt to prepare for next plugin */
-	if (dp->dp_display.internal_hpd)
-		dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
-
 	drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 			dp->dp_display.connector_type, state);
 
@@ -1083,26 +1067,6 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
 	mutex_unlock(&dp_display->event_mutex);
 }
 
-static void dp_display_config_hpd(struct dp_display_private *dp)
-{
-
-	dp_display_host_init(dp);
-	dp_catalog_ctrl_hpd_config(dp->catalog);
-
-	/* Enable plug and unplug interrupts only if requested */
-	if (dp->dp_display.internal_hpd)
-		dp_catalog_hpd_config_intr(dp->catalog,
-				DP_DP_HPD_PLUG_INT_MASK |
-				DP_DP_HPD_UNPLUG_INT_MASK,
-				true);
-
-	/* Enable interrupt first time
-	 * we are leaving dp clocks on during disconnect
-	 * and never disable interrupt
-	 */
-	enable_irq(dp->irq);
-}
-
 void dp_display_set_psr(struct msm_dp *dp_display, bool enter)
 {
 	struct dp_display_private *dp;
@@ -1177,7 +1141,7 @@ static int hpd_event_thread(void *data)
 
 		switch (todo->event_id) {
 		case EV_HPD_INIT_SETUP:
-			dp_display_config_hpd(dp_priv);
+			dp_display_host_init(dp_priv);
 			break;
 		case EV_HPD_PLUG_INT:
 			dp_hpd_plug_handle(dp_priv, todo->data);
@@ -1283,7 +1247,6 @@ int dp_display_request_irq(struct msm_dp *dp_display)
 				dp->irq, rc);
 		return rc;
 	}
-	disable_irq(dp->irq);
 
 	return 0;
 }
@@ -1395,13 +1358,8 @@ static int dp_pm_resume(struct device *dev)
 	/* turn on dp ctrl/phy */
 	dp_display_host_init(dp);
 
-	dp_catalog_ctrl_hpd_config(dp->catalog);
-
-	if (dp->dp_display.internal_hpd)
-		dp_catalog_hpd_config_intr(dp->catalog,
-				DP_DP_HPD_PLUG_INT_MASK |
-				DP_DP_HPD_UNPLUG_INT_MASK,
-				true);
+	if (dp_display->is_edp)
+		dp_catalog_ctrl_hpd_enable(dp->catalog);
 
 	if (dp_catalog_link_is_connected(dp->catalog)) {
 		/*
@@ -1569,9 +1527,8 @@ static int dp_display_get_next_bridge(struct msm_dp *dp)
 
 	if (aux_bus && dp->is_edp) {
 		dp_display_host_init(dp_priv);
-		dp_catalog_ctrl_hpd_config(dp_priv->catalog);
+		dp_catalog_ctrl_hpd_enable(dp_priv->catalog);
 		dp_display_host_phy_init(dp_priv);
-		enable_irq(dp_priv->irq);
 
 		/*
 		 * The code below assumes that the panel will finish probing
@@ -1613,7 +1570,6 @@ static int dp_display_get_next_bridge(struct msm_dp *dp)
 
 error:
 	if (dp->is_edp) {
-		disable_irq(dp_priv->irq);
 		dp_display_host_phy_exit(dp_priv);
 		dp_display_host_deinit(dp_priv);
 	}
@@ -1802,16 +1758,31 @@ void dp_bridge_hpd_enable(struct drm_bridge *bridge)
 {
 	struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
 	struct msm_dp *dp_display = dp_bridge->dp_display;
+	struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+	mutex_lock(&dp->event_mutex);
+	dp_catalog_ctrl_hpd_enable(dp->catalog);
+
+	/* enable HDP interrupts */
+	dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true);
 
 	dp_display->internal_hpd = true;
+	mutex_unlock(&dp->event_mutex);
 }
 
 void dp_bridge_hpd_disable(struct drm_bridge *bridge)
 {
 	struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
 	struct msm_dp *dp_display = dp_bridge->dp_display;
+	struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+	mutex_lock(&dp->event_mutex);
+	/* disable HDP interrupts */
+	dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
+	dp_catalog_ctrl_hpd_disable(dp->catalog);
 
 	dp_display->internal_hpd = false;
+	mutex_unlock(&dp->event_mutex);
 }
 
 void dp_bridge_hpd_notify(struct drm_bridge *bridge,

drivers/gpu/drm/msm/msm_drv.c

@@ -449,6 +449,8 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 	if (ret)
 		goto err_cleanup_mode_config;
 
+	dma_set_max_seg_size(dev, UINT_MAX);
+
 	/* Bind all our sub-components: */
 	ret = component_bind_all(dev, ddev);
 	if (ret)
@@ -459,8 +461,6 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 	if (ret)
 		goto err_msm_uninit;
 
-	dma_set_max_seg_size(dev, UINT_MAX);
-
 	msm_gem_shrinker_init(ddev);
 
 	if (priv->kms_init) {