+++ /dev/null
-From 1c2c44642f12b5c84c61e60074e9611c759dd16a Mon Sep 17 00:00:00 2001
-From: Sasha Levin <sashal@kernel.org>
-Date: Fri, 28 Feb 2025 23:11:20 -0500
-Subject: drm/amdgpu: add dce_v6_0_soft_reset() to DCE6
-
-From: Alexandre Demers <alexandre.f.demers@gmail.com>
-
-[ Upstream commit ab23db6d08efdda5d13d01a66c593d0e57f8917f ]
-
-DCE6 was missing soft reset, but it was easily identifiable under radeon.
-This should be it, pretty much as it is done under DCE8 and DCE10.
-
-Signed-off-by: Alexandre Demers <alexandre.f.demers@gmail.com>
-Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
-Signed-off-by: Sasha Levin <sashal@kernel.org>
----
- drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 53 ++++++++++++++++++++++++++-
- 1 file changed, 51 insertions(+), 2 deletions(-)
-
-diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
-index 915804a6a1d7d..ed5e06b677df1 100644
---- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
-+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
-@@ -370,13 +370,41 @@ static u32 dce_v6_0_hpd_get_gpio_reg(struct amdgpu_device *adev)
- return mmDC_GPIO_HPD_A;
- }
-
-+static bool dce_v6_0_is_display_hung(struct amdgpu_device *adev)
-+{
-+ u32 crtc_hung = 0;
-+ u32 crtc_status[6];
-+ u32 i, j, tmp;
-+
-+ for (i = 0; i < adev->mode_info.num_crtc; i++) {
-+ if (RREG32(mmCRTC_CONTROL + crtc_offsets[i]) & CRTC_CONTROL__CRTC_MASTER_EN_MASK) {
-+ crtc_status[i] = RREG32(mmCRTC_STATUS_HV_COUNT + crtc_offsets[i]);
-+ crtc_hung |= (1 << i);
-+ }
-+ }
-+
-+ for (j = 0; j < 10; j++) {
-+ for (i = 0; i < adev->mode_info.num_crtc; i++) {
-+ if (crtc_hung & (1 << i)) {
-+ tmp = RREG32(mmCRTC_STATUS_HV_COUNT + crtc_offsets[i]);
-+ if (tmp != crtc_status[i])
-+ crtc_hung &= ~(1 << i);
-+ }
-+ }
-+ if (crtc_hung == 0)
-+ return false;
-+ udelay(100);
-+ }
-+
-+ return true;
-+}
-+
- static void dce_v6_0_set_vga_render_state(struct amdgpu_device *adev,
- bool render)
- {
- if (!render)
- WREG32(mmVGA_RENDER_CONTROL,
- RREG32(mmVGA_RENDER_CONTROL) & VGA_VSTATUS_CNTL);
--
- }
-
- static int dce_v6_0_get_num_crtc(struct amdgpu_device *adev)
-@@ -2872,7 +2900,28 @@ static bool dce_v6_0_is_idle(void *handle)
-
- static int dce_v6_0_soft_reset(struct amdgpu_ip_block *ip_block)
- {
-- DRM_INFO("xxxx: dce_v6_0_soft_reset --- no impl!!\n");
-+ u32 srbm_soft_reset = 0, tmp;
-+ struct amdgpu_device *adev = ip_block->adev;
-+
-+ if (dce_v6_0_is_display_hung(adev))
-+ srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_DC_MASK;
-+
-+ if (srbm_soft_reset) {
-+ tmp = RREG32(mmSRBM_SOFT_RESET);
-+ tmp |= srbm_soft_reset;
-+ dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
-+ WREG32(mmSRBM_SOFT_RESET, tmp);
-+ tmp = RREG32(mmSRBM_SOFT_RESET);
-+
-+ udelay(50);
-+
-+ tmp &= ~srbm_soft_reset;
-+ WREG32(mmSRBM_SOFT_RESET, tmp);
-+ tmp = RREG32(mmSRBM_SOFT_RESET);
-+
-+ /* Wait a little for things to settle down */
-+ udelay(50);
-+ }
- return 0;
- }
-
---
-2.39.5
-