From 537ef0f8889761ffe3a6cb4a7bda4de47fe2d69b Mon Sep 17 00:00:00 2001
From: Hamza Mahfooz <hamza.mahfooz@amd.com>
Date: Thu, 15 Aug 2024 14:37:27 -0400
Subject: [PATCH] drm/amd/display: use new vblank enable policy for DCN35+
Hook up drm_crtc_vblank_on_config() in amdgpu_dm. So, that we can enable
PSR and other static screen optimizations more quickly, while avoiding
stuttering issues that are accompanied by the following dmesg error:
[drm:dc_dmub_srv_wait_idle [amdgpu]] *ERROR* Error waiting for DMUB idle: status=3
This also allows us to mimic how vblanking is handled by the Windows
amdgpu driver. Specifically, we wait two idle frames before disabling
the vblank timer there.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240822161856.174600-2-hamza.mahfooz@amd.com
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 35 +++++++++++++------
1 file changed, 24 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 7e7929f24ae44..032a0ea4b0668 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4934,12 +4934,6 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
if (psr_feature_enabled)
amdgpu_dm_set_psr_caps(link);
-
- /* TODO: Fix vblank control helpers to delay PSR entry to allow this when
- * PSR is also supported.
- */
- if (link->psr_settings.psr_feature_enabled)
- adev_to_drm(adev)->vblank_disable_immediate = false;
}
}
amdgpu_set_panel_orientation(&aconnector->base);
@@ -8232,7 +8226,7 @@ static int amdgpu_dm_encoder_init(struct drm_device *dev,
static void manage_dm_interrupts(struct amdgpu_device *adev,
struct amdgpu_crtc *acrtc,
- bool enable)
+ struct dm_crtc_state *acrtc_state)
{
/*
* We have no guarantee that the frontend index maps to the same
@@ -8244,9 +8238,28 @@ static void manage_dm_interrupts(struct amdgpu_device *adev,
amdgpu_display_crtc_idx_to_irq_type(
adev,
acrtc->crtc_id);
+ struct drm_vblank_crtc_config config = {0};
+ struct dc_crtc_timing *timing;
+ int offdelay;
+
+ if (acrtc_state) {
+ if (amdgpu_ip_version(adev, DCE_HWIP, 0) <
+ IP_VERSION(3, 5, 0)) {
+ drm_crtc_vblank_on(&acrtc->base);
+ } else {
+ timing = &acrtc_state->stream->timing;
+
+ /* at least 2 frames */
+ offdelay = DIV64_U64_ROUND_UP((u64)20 *
+ timing->v_total *
+ timing->h_total,
+ timing->pix_clk_100hz);
+
+ config.offdelay_ms = offdelay ?: 30;
+ drm_crtc_vblank_on_config(&acrtc->base,
+ &config);
+ }
- if (enable) {
- drm_crtc_vblank_on(&acrtc->base);
amdgpu_irq_get(
adev,
&adev->pageflip_irq,
@@ -9320,7 +9333,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
if (old_crtc_state->active &&
(!new_crtc_state->active ||
drm_atomic_crtc_needs_modeset(new_crtc_state))) {
- manage_dm_interrupts(adev, acrtc, false);
+ manage_dm_interrupts(adev, acrtc, NULL);
dc_stream_release(dm_old_crtc_state->stream);
}
}
@@ -9835,7 +9848,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
drm_atomic_crtc_needs_modeset(new_crtc_state))) {
dc_stream_retain(dm_new_crtc_state->stream);
acrtc->dm_irq_params.stream = dm_new_crtc_state->stream;
- manage_dm_interrupts(adev, acrtc, true);
+ manage_dm_interrupts(adev, acrtc, dm_new_crtc_state);
}
/* Handle vrr on->off / off->on transitions */
amdgpu_dm_handle_vrr_transition(dm_old_crtc_state, dm_new_crtc_state);
--
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