[PATCH 4.19 10/88] drm/msm/a6xx: fix gmu start on newer firmware

Greg Kroah-Hartman
2020-09-08T19:02:49Z

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

[ Upstream commit f5749d6181fa7df5ae741788e5d96f593d3a60b6 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 9cde79a7335c8..739ca9c2081a6 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -117,12 +117,22 @@ static int a6xx_gmu_start(struct a6xx_gmu *gmu)
{
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)
dev_err(gmu->dev, "GMU firmware initialization timed out\n");
--
2.25.1