Merge "msm: mdss: enforce bimc smmu gdsc power sequence"

drivers/video/fbdev/msm/mdss.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -281,7 +281,7 @@ struct mdss_data_type {
 	u32 mdp_rev;
 	struct clk *mdp_clk[MDSS_MAX_CLK];
 	struct regulator *fs;
-	struct regulator *venus;
+	struct regulator *core_gdsc;
 	struct regulator *vdd_cx;
 	u32 vdd_cx_min_uv;
 	u32 vdd_cx_max_uv;

drivers/video/fbdev/msm/mdss_mdp.c

@@ -1,7 +1,7 @@
 /*
  * MDSS MDP Interface (used by framebuffer core)
  *
- * Copyright (c) 2007-2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2007-2017, The Linux Foundation. All rights reserved.
  * Copyright (C) 2007 Google Incorporated
  *
  * This software is licensed under the terms of the GNU General Public
@@ -1794,11 +1794,13 @@ static int mdss_mdp_irq_clk_setup(struct mdss_data_type *mdata)
 		return -EINVAL;
 	}
 
-	mdata->venus = devm_regulator_get_optional(&mdata->pdev->dev,
-		"gdsc-venus");
-	if (IS_ERR_OR_NULL(mdata->venus)) {
-		mdata->venus = NULL;
-		pr_debug("unable to get venus gdsc regulator\n");
+	mdata->core_gdsc = devm_regulator_get_optional(&mdata->pdev->dev,
+		"gdsc-core");
+	if (IS_ERR_OR_NULL(mdata->core_gdsc)) {
+		mdata->core_gdsc = NULL;
+		pr_err("unable to get core gdsc regulator\n");
+	} else {
+		pr_debug("core gdsc regulator found\n");
 	}
 
 	mdata->fs_ena = false;
@@ -2370,10 +2372,10 @@ void mdss_mdp_footswitch_ctrl_splash(int on)
 		if (on) {
 			mdata->handoff_pending = true;
 			pr_debug("Enable MDP FS for splash.\n");
-			if (mdata->venus) {
-				ret = regulator_enable(mdata->venus);
+			if (mdata->core_gdsc) {
+				ret = regulator_enable(mdata->core_gdsc);
 				if (ret)
-					pr_err("venus failed to enable\n");
+					pr_err("core_gdsc failed to enable\n");
 			}
 
 			ret = regulator_enable(mdata->fs);
@@ -2387,8 +2389,8 @@ void mdss_mdp_footswitch_ctrl_splash(int on)
 			mdss_bus_bandwidth_ctrl(false);
 			mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_OFF);
 			regulator_disable(mdata->fs);
-			if (mdata->venus)
-				regulator_disable(mdata->venus);
+			if (mdata->core_gdsc)
+				regulator_disable(mdata->core_gdsc);
 			mdata->handoff_pending = false;
 		}
 	} else {
@@ -5059,6 +5061,7 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on)
 {
 	int ret;
 	int active_cnt = 0;
+	bool footswitch_suspend = false;
 
 	if (!mdata->fs)
 		return;
@@ -5069,12 +5072,21 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on)
 	if (on) {
 		if (!mdata->fs_ena) {
 			pr_debug("Enable MDP FS\n");
-			if (mdata->venus) {
-				ret = regulator_enable(mdata->venus);
+			if (mdata->core_gdsc) {
+				ret = regulator_enable(mdata->core_gdsc);
 				if (ret)
-					pr_err("venus failed to enable\n");
+					pr_err("core_gdsc failed to enable\n");
 			}
 
+			/*
+			 * Advise RPM to not turn MMSS GDSC off, this will
+			 * ensure that GDSC off is maintained during Active
+			 * display and during Idle display
+			 */
+			if (mdss_has_quirk(mdata,
+					MDSS_QUIRK_MMSS_GDSC_COLLAPSE))
+				mdss_rpm_set_msg_ram(true);
+
 			ret = regulator_enable(mdata->fs);
 			if (ret)
 				pr_warn("Footswitch failed to enable\n");
@@ -5091,13 +5103,6 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on)
 			pr_debug("Disable MDP FS\n");
 			active_cnt = atomic_read(&mdata->active_intf_cnt);
 			if (active_cnt != 0) {
-				/*
-				 * Advise RPM to not turn MMSS GDSC off during
-				 * idle case.
-				 */
-				if (mdss_has_quirk(mdata,
-						MDSS_QUIRK_MMSS_GDSC_COLLAPSE))
-					mdss_rpm_set_msg_ram(true);
 				/*
 				 * Turning off GDSC while overlays are still
 				 * active.
@@ -5109,14 +5114,8 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on)
 				pr_debug("idle pc. active overlays=%d\n",
 					active_cnt);
 			} else {
-				/*
-				 * Advise RPM to turn MMSS GDSC off during
-				 * suspend case
-				 */
-				if (mdss_has_quirk(mdata,
-						MDSS_QUIRK_MMSS_GDSC_COLLAPSE))
-					mdss_rpm_set_msg_ram(false);
 
+				footswitch_suspend = true;
 				mdss_mdp_cx_ctrl(mdata, false);
 				mdss_mdp_batfet_ctrl(mdata, false);
 				mdss_mdp_memory_retention_ctrl(
@@ -5127,8 +5126,21 @@ static void mdss_mdp_footswitch_ctrl(struct mdss_data_type *mdata, int on)
 			if (mdata->en_svs_high)
 				mdss_mdp_config_cx_voltage(mdata, false);
 			regulator_disable(mdata->fs);
-			if (mdata->venus)
-				regulator_disable(mdata->venus);
+			if (mdata->core_gdsc)
+				regulator_disable(mdata->core_gdsc);
+
+			if (footswitch_suspend) {
+				/*
+				 * Advise RPM to turn MMSS GDSC off during
+				 * suspend case, do this after the MDSS GDSC
+				 * regulator OFF, so we can ensure that MMSS
+				 * GDSC will go OFF after the MDSS GDSC
+				 * regulator
+				 */
+				if (mdss_has_quirk(mdata,
+						MDSS_QUIRK_MMSS_GDSC_COLLAPSE))
+					mdss_rpm_set_msg_ram(false);
+			}
 		}
 		mdata->fs_ena = false;
 	}