From f5749d6181fa7df5ae741788e5d96f593d3a60b6 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Thu, 20 Aug 2020 12:36:22 +0300
Subject: [PATCH] drm/msm/a6xx: fix gmu start on newer firmware
Git-commit: f5749d6181fa7df5ae741788e5d96f593d3a60b6
Patch-mainline: v5.9-rc3
References: git-fixes

New Qualcomm firmware has changed a way it reports back the 'started'
event. Support new register values.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -199,12 +199,22 @@ static int a6xx_gmu_start(struct a6xx_gm
 {
 	int ret;
 	u32 val;
+	u32 mask, reset_val;
+
+	val = gmu_read(gmu, REG_A6XX_GMU_CM3_DTCM_START + 0xff8);
+	if (val <= 0x20010004) {
+		mask = 0xffffffff;
+		reset_val = 0xbabeface;
+	} else {
+		mask = 0x1ff;
+		reset_val = 0x100;
+	}
 
 	gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
 	gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
 
 	ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
-		val == 0xbabeface, 100, 10000);
+		(val & mask) == reset_val, 100, 10000);
 
 	if (ret)
 		DRM_DEV_ERROR(gmu->dev, "GMU firmware initialization timed out\n");