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drm/amd/display: Add below the range support for FreeSync 

[Why]
When the flip-rate is below the minimum supported variable refresh rate
range for the monitor the front porch wait will timeout and be
frequently misaligned resulting in stuttering and/or flickering.

The FreeSync module can still maintain a smooth and flicker free
image when the monitor has a refresh rate range such that the maximum
refresh > 2 * minimum refresh by utilizing low framerate compensation,
"below the range".

[How]
Hook up the pre-flip and post-flip handlers from the FreeSync module.
These adjust the minimum/maximum vrr range to duplicate frames
when appropriate by tracking flip timestamps.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2018-12-05 12:08:56 -05:00 committed by Alex Deucher
parent 8cd61c313d
commit 180db303ff
2 changed files with 63 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -331,12 +331,29 @@ static void dm_crtc_high_irq(void *interrupt_params)
struct common_irq_params *irq_params = interrupt_params;
struct amdgpu_device *adev = irq_params->adev;
struct amdgpu_crtc *acrtc;
struct dm_crtc_state *acrtc_state;
acrtc = get_crtc_by_otg_inst(adev, irq_params->irq_src - IRQ_TYPE_VBLANK);
if (acrtc) {
drm_crtc_handle_vblank(&acrtc->base);
amdgpu_dm_crtc_handle_crc_irq(&acrtc->base);
acrtc_state = to_dm_crtc_state(acrtc->base.state);
if (acrtc_state->stream &&
acrtc_state->vrr_params.supported &&
acrtc_state->freesync_config.state == VRR_STATE_ACTIVE_VARIABLE) {
mod_freesync_handle_v_update(
adev->dm.freesync_module,
acrtc_state->stream,
&acrtc_state->vrr_params);
dc_stream_adjust_vmin_vmax(
adev->dm.dc,
acrtc_state->stream,
&acrtc_state->vrr_params.adjust);
}
}
}
@ -3009,7 +3026,7 @@ dm_crtc_duplicate_state(struct drm_crtc *crtc)
dc_stream_retain(state->stream);
}
state->adjust = cur->adjust;
state->vrr_params = cur->vrr_params;
state->vrr_infopacket = cur->vrr_infopacket;
state->abm_level = cur->abm_level;
state->vrr_supported = cur->vrr_supported;
@ -4455,9 +4472,11 @@ struct dc_stream_status *dc_state_get_stream_status(
static void update_freesync_state_on_stream(
struct amdgpu_display_manager *dm,
struct dm_crtc_state *new_crtc_state,
struct dc_stream_state *new_stream)
struct dc_stream_state *new_stream,
struct dc_plane_state *surface,
u32 flip_timestamp_in_us)
{
struct mod_vrr_params vrr = {0};
struct mod_vrr_params vrr_params = new_crtc_state->vrr_params;
struct dc_info_packet vrr_infopacket = {0};
struct mod_freesync_config config = new_crtc_state->freesync_config;
@ -4484,43 +4503,52 @@ static void update_freesync_state_on_stream(
mod_freesync_build_vrr_params(dm->freesync_module,
new_stream,
&config, &vrr);
&config, &vrr_params);
if (surface) {
mod_freesync_handle_preflip(
dm->freesync_module,
surface,
new_stream,
flip_timestamp_in_us,
&vrr_params);
}
mod_freesync_build_vrr_infopacket(
dm->freesync_module,
new_stream,
&vrr,
&vrr_params,
PACKET_TYPE_VRR,
TRANSFER_FUNC_UNKNOWN,
&vrr_infopacket);
new_crtc_state->freesync_timing_changed =
(memcmp(&new_crtc_state->adjust,
&vrr.adjust,
sizeof(vrr.adjust)) != 0);
(memcmp(&new_crtc_state->vrr_params.adjust,
&vrr_params.adjust,
sizeof(vrr_params.adjust)) != 0);
new_crtc_state->freesync_vrr_info_changed =
(memcmp(&new_crtc_state->vrr_infopacket,
&vrr_infopacket,
sizeof(vrr_infopacket)) != 0);
new_crtc_state->adjust = vrr.adjust;
new_crtc_state->vrr_params = vrr_params;
new_crtc_state->vrr_infopacket = vrr_infopacket;
new_stream->adjust = new_crtc_state->adjust;
new_stream->adjust = new_crtc_state->vrr_params.adjust;
new_stream->vrr_infopacket = vrr_infopacket;
if (new_crtc_state->freesync_vrr_info_changed)
DRM_DEBUG_KMS("VRR packet update: crtc=%u enabled=%d state=%d",
new_crtc_state->base.crtc->base.id,
(int)new_crtc_state->base.vrr_enabled,
(int)vrr.state);
(int)vrr_params.state);
if (new_crtc_state->freesync_timing_changed)
DRM_DEBUG_KMS("VRR timing update: crtc=%u min=%u max=%u\n",
new_crtc_state->base.crtc->base.id,
vrr.adjust.v_total_min,
vrr.adjust.v_total_max);
vrr_params.adjust.v_total_min,
vrr_params.adjust.v_total_max);
}
/*
@ -4547,6 +4575,7 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
struct dc_stream_update stream_update = {0};
struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
struct dc_stream_status *stream_status;
struct dc_plane_state *surface;
/* Prepare wait for target vblank early - before the fence-waits */
@ -4595,6 +4624,7 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
addr.address.grph.addr.low_part = lower_32_bits(afb->address);
addr.address.grph.addr.high_part = upper_32_bits(afb->address);
addr.flip_immediate = async_flip;
addr.flip_timestamp_in_us = ktime_get_ns() / 1000;
if (acrtc->base.state->event)
@ -4609,8 +4639,10 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
return;
}
surface_updates->surface = stream_status->plane_states[0];
if (!surface_updates->surface) {
surface = stream_status->plane_states[0];
surface_updates->surface = surface;
if (!surface) {
DRM_ERROR("No surface for CRTC: id=%d\n",
acrtc->crtc_id);
return;
@ -4621,7 +4653,9 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
update_freesync_state_on_stream(
&adev->dm,
acrtc_state,
acrtc_state->stream);
acrtc_state->stream,
surface,
addr.flip_timestamp_in_us);
if (acrtc_state->freesync_timing_changed)
stream_update.adjust =
@ -4632,7 +4666,16 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
&acrtc_state->stream->vrr_infopacket;
}
/* Update surface timing information. */
surface->time.time_elapsed_in_us[surface->time.index] =
addr.flip_timestamp_in_us - surface->time.prev_update_time_in_us;
surface->time.prev_update_time_in_us = addr.flip_timestamp_in_us;
surface->time.index++;
if (surface->time.index >= DC_PLANE_UPDATE_TIMES_MAX)
surface->time.index = 0;
mutex_lock(&adev->dm.dc_lock);
dc_commit_updates_for_stream(adev->dm.dc,
surface_updates,
1,
@ -5324,6 +5367,7 @@ static void get_freesync_config_for_crtc(
config.max_refresh_in_uhz =
aconnector->max_vfreq * 1000000;
config.vsif_supported = true;
config.btr = true;
}
new_crtc_state->freesync_config = config;
@ -5334,8 +5378,8 @@ static void reset_freesync_config_for_crtc(
{
new_crtc_state->vrr_supported = false;
memset(&new_crtc_state->adjust, 0,
sizeof(new_crtc_state->adjust));
memset(&new_crtc_state->vrr_params, 0,
sizeof(new_crtc_state->vrr_params));
memset(&new_crtc_state->vrr_infopacket, 0,
sizeof(new_crtc_state->vrr_infopacket));
}

2
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
View File

@ -268,7 +268,7 @@ struct dm_crtc_state {
bool vrr_supported;
struct mod_freesync_config freesync_config;
struct dc_crtc_timing_adjust adjust;
struct mod_vrr_params vrr_params;
struct dc_info_packet vrr_infopacket;
int abm_level;