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From 0dbd7c108352655912dfaca3f9ef04f18dc39110 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 1 Nov 2018 00:00:57 -0500
Subject: [PATCH 1058/2940] drm/amdgpu/soc15: add need_reset_on_init asic
callback for SOC15 (v2)
SOC15 chips require a reset if the driver was previously loaded
because the PSP can only be loaded once between each reset.
v2: rebase, handle multiple asic funcs
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/soc15.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 1db5ed12d450..4e560593859f 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -46,6 +46,7 @@
#include "nbio/nbio_7_0_default.h"
#include "nbio/nbio_7_0_sh_mask.h"
#include "nbio/nbio_7_0_smn.h"
+#include "mp/mp_9_0_offset.h"
#include "soc15.h"
#include "soc15_common.h"
@@ -650,6 +651,23 @@ static void soc15_get_pcie_usage(struct amdgpu_device *adev, uint64_t *count0,
*count1 = RREG32_PCIE(smnPCIE_PERF_COUNT1_TXCLK) | (cnt1_of << 32);
}
+static bool soc15_need_reset_on_init(struct amdgpu_device *adev)
+{
+ u32 sol_reg;
+
+ if (adev->flags & AMD_IS_APU)
+ return false;
+
+ /* Check sOS sign of life register to confirm sys driver and sOS
+ * are already been loaded.
+ */
+ sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
+ if (sol_reg)
+ return true;
+
+ return false;
+}
+
static const struct amdgpu_asic_funcs soc15_asic_funcs =
{
.read_disabled_bios = &soc15_read_disabled_bios,
@@ -666,6 +684,7 @@ static const struct amdgpu_asic_funcs soc15_asic_funcs =
.need_full_reset = &soc15_need_full_reset,
.init_doorbell_index = &vega10_doorbell_index_init,
.get_pcie_usage = &soc15_get_pcie_usage,
+ .need_reset_on_init = &soc15_need_reset_on_init,
};
static const struct amdgpu_asic_funcs vega20_asic_funcs =
@@ -684,6 +703,7 @@ static const struct amdgpu_asic_funcs vega20_asic_funcs =
.need_full_reset = &soc15_need_full_reset,
.init_doorbell_index = &vega20_doorbell_index_init,
.get_pcie_usage = &soc15_get_pcie_usage,
+ .need_reset_on_init = &soc15_need_reset_on_init,
};
static int soc15_common_early_init(void *handle)
--
2.17.1
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