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; }