linux-kernel - [PATCH AUTOSEL 5.19 09/16] drm/amdgpu: add HDP remap functionality to nbio 7.7

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Date:   Wed, 21 Sep 2022 11:53:25 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alex Deucher <alexander.deucher@....com>,
        Lijo Lazar <lijo.lazar@....com>,
        Sasha Levin <sashal@...nel.org>, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        Xiaojian.Du@....com, tim.huang@....com, yifan1.zhang@....com,
        ray.huang@....com, jiapeng.chong@...ux.alibaba.com,
        sonny.jiang@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.19 09/16] drm/amdgpu: add HDP remap functionality to nbio 7.7

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

[ Upstream commit 8c5708d3da37b8c7c3c22c7e945b9a76a7c9539b ]

Was missing before and would have resulted in a write to
a non-existant register. Normally APUs don't use HDP, but
other asics could use this code and APUs do use the HDP
when used in passthrough.

Reviewed-by: Lijo Lazar <lijo.lazar@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c
index cdc0c9779848..6c1fd471a4c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c
@@ -28,6 +28,14 @@
 #include "nbio/nbio_7_7_0_sh_mask.h"
 #include <uapi/linux/kfd_ioctl.h>
 
+static void nbio_v7_7_remap_hdp_registers(struct amdgpu_device *adev)
+{
+	WREG32_SOC15(NBIO, 0, regBIF_BX0_REMAP_HDP_MEM_FLUSH_CNTL,
+		     adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL);
+	WREG32_SOC15(NBIO, 0, regBIF_BX0_REMAP_HDP_REG_FLUSH_CNTL,
+		     adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_REG_FLUSH_CNTL);
+}
+
 static u32 nbio_v7_7_get_rev_id(struct amdgpu_device *adev)
 {
 	u32 tmp;
@@ -237,4 +245,5 @@ const struct amdgpu_nbio_funcs nbio_v7_7_funcs = {
 	.ih_doorbell_range = nbio_v7_7_ih_doorbell_range,
 	.ih_control = nbio_v7_7_ih_control,
 	.init_registers = nbio_v7_7_init_registers,
+	.remap_hdp_registers = nbio_v7_7_remap_hdp_registers,
 };
-- 
2.35.1