linux-kernel - [PATCH 4.19 101/118] drm/amdgpu/gmc8: always load MC firmware in the driver

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Message-Id: <20181211151648.346347639@linuxfoundation.org>
Date:   Tue, 11 Dec 2018 16:42:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christian König <christian.koenig@....com>,
        Junwei Zhang <Jerry.Zhang@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.19 101/118] drm/amdgpu/gmc8: always load MC firmware in the driver

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@....com>

commit b52b6738cc2d50d2a8f4d0095bcb5a86716008a5 upstream.

Some power features rely on the driver loaded version so always
load the MC firmware from the driver even if the vbios loaded
a version already.

Acked-by: Christian König <christian.koenig@....com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -365,7 +365,7 @@ static int gmc_v8_0_polaris_mc_load_micr
 	const struct mc_firmware_header_v1_0 *hdr;
 	const __le32 *fw_data = NULL;
 	const __le32 *io_mc_regs = NULL;
-	u32 data, vbios_version;
+	u32 data;
 	int i, ucode_size, regs_size;
 
 	/* Skip MC ucode loading on SR-IOV capable boards.
@@ -376,13 +376,6 @@ static int gmc_v8_0_polaris_mc_load_micr
 	if (amdgpu_sriov_bios(adev))
 		return 0;
 
-	WREG32(mmMC_SEQ_IO_DEBUG_INDEX, 0x9F);
-	data = RREG32(mmMC_SEQ_IO_DEBUG_DATA);
-	vbios_version = data & 0xf;
-
-	if (vbios_version == 0)
-		return 0;
-
 	if (!adev->gmc.fw)
 		return -EINVAL;