On sm8450 a register block was removed from MDP TOP. Accessing it during snapshotting results in NoC errors / immediate reboot. Skip accessing these registers during snapshot.
Tested-by: Vinod Koul <vk...@kernel.org> Reviewed-by: Vinod Koul <vk...@kernel.org> Reviewed-by: Konrad Dybcio <konrad.dyb...@linaro.org> Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 3 +++ drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 11 +++++++++-- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h index 38aa38ab1568..8da4c5ba6dc3 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h @@ -82,6 +82,8 @@ enum { * @DPU_MDP_UBWC_1_0, This chipsets supports Universal Bandwidth * compression initial revision * @DPU_MDP_UBWC_1_5, Universal Bandwidth compression version 1.5 + * @DPU_MDP_PERIPH_0_REMOVED Indicates that access to periph top0 block results + * in a failure * @DPU_MDP_MAX Maximum value */ @@ -92,6 +94,7 @@ enum { DPU_MDP_UBWC_1_0, DPU_MDP_UBWC_1_5, DPU_MDP_AUDIO_SELECT, + DPU_MDP_PERIPH_0_REMOVED, DPU_MDP_MAX }; diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index f3660cd14f4f..4ac14de55139 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -927,8 +927,15 @@ static void dpu_kms_mdp_snapshot(struct msm_disp_state *disp_state, struct msm_k msm_disp_snapshot_add_block(disp_state, cat->wb[i].len, dpu_kms->mmio + cat->wb[i].base, "wb_%d", i); - msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len, - dpu_kms->mmio + cat->mdp[0].base, "top"); + if (cat->mdp[0].features & BIT(DPU_MDP_PERIPH_0_REMOVED)) { + msm_disp_snapshot_add_block(disp_state, 0x380, + dpu_kms->mmio + cat->mdp[0].base, "top"); + msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len - 0x3a8, + dpu_kms->mmio + cat->mdp[0].base + 0x3a8, "top_2"); + } else { + msm_disp_snapshot_add_block(disp_state, cat->mdp[0].len, + dpu_kms->mmio + cat->mdp[0].base, "top"); + } pm_runtime_put_sync(&dpu_kms->pdev->dev); } -- 2.35.1