[PATCH 10/18] drm/amd/display: Hande writeback request from userspace
Alex Hung
alex.hung at amd.com
Wed Aug 16 21:26:18 UTC 2023
[WHAT]
Handle writeback requests and fill in the required information for DWB
programming and setup.
Signed-off-by: Alex Hung <alex.hung at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 3 +
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 159 ++++++++++++++++++
2 files changed, 162 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 32fe05c810c6..a166d7684719 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -416,6 +416,9 @@ struct amdgpu_crtc {
int otg_inst;
struct drm_pending_vblank_event *event;
+
+ bool wb_pending;
+ struct drm_writeback_connector *wb_conn;
};
struct amdgpu_encoder_atom_dig {
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 82f00af14ada..fdfcafbaa668 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -572,6 +572,7 @@ 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 drm_writeback_job *job;
struct amdgpu_crtc *acrtc;
unsigned long flags;
int vrr_active;
@@ -580,6 +581,21 @@ static void dm_crtc_high_irq(void *interrupt_params)
if (!acrtc)
return;
+ if (acrtc->wb_pending) {
+ if (acrtc->wb_conn) {
+ spin_lock_irqsave(&acrtc->wb_conn->job_lock, flags);
+ job = list_first_entry_or_null(&acrtc->wb_conn->job_queue,
+ struct drm_writeback_job,
+ list_entry);
+ spin_unlock_irqrestore(&acrtc->wb_conn->job_lock, flags);
+
+ if (job)
+ drm_writeback_signal_completion(acrtc->wb_conn, 0);
+ } else
+ DRM_ERROR("%s: no amdgpu_crtc wb_conn\n", __func__);
+ acrtc->wb_pending = false;
+ }
+
vrr_active = amdgpu_dm_crtc_vrr_active_irq(acrtc);
DC_LOG_VBLANK("crtc:%d, vupdate-vrr:%d, planes:%d\n", acrtc->crtc_id,
@@ -8515,6 +8531,12 @@ static void amdgpu_dm_crtc_copy_transient_flags(struct drm_crtc_state *crtc_stat
stream_state->mode_changed = drm_atomic_crtc_needs_modeset(crtc_state);
}
+static void dm_clear_writeback(struct amdgpu_display_manager *dm,
+ struct dm_crtc_state *crtc_state)
+{
+ dc_stream_remove_writeback(dm->dc, crtc_state->stream, 0);
+}
+
static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
struct dc_state *dc_state)
{
@@ -8524,9 +8546,34 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
struct drm_crtc *crtc;
struct drm_crtc_state *old_crtc_state, *new_crtc_state;
struct dm_crtc_state *dm_old_crtc_state, *dm_new_crtc_state;
+ struct drm_connector_state *old_con_state;
+ struct drm_connector *connector;
bool mode_set_reset_required = false;
u32 i;
+ /* Disable writeback */
+ for_each_old_connector_in_state(state, connector, old_con_state, i) {
+ struct dm_connector_state *dm_old_con_state;
+ struct amdgpu_crtc *acrtc;
+
+ if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
+ continue;
+
+ old_crtc_state = NULL;
+
+ dm_old_con_state = to_dm_connector_state(old_con_state);
+ if (!dm_old_con_state->base.crtc)
+ continue;
+
+ acrtc = to_amdgpu_crtc(dm_old_con_state->base.crtc);
+ if (acrtc)
+ old_crtc_state = drm_atomic_get_old_crtc_state(state, &acrtc->base);
+
+ dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);
+
+ dm_clear_writeback(dm, dm_old_crtc_state);
+ }
+
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
@@ -8661,6 +8708,97 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
}
}
+static void dm_set_writeback(struct amdgpu_display_manager *dm,
+ struct dm_crtc_state *crtc_state,
+ struct drm_connector *connector,
+ struct drm_connector_state *new_con_state)
+{
+ struct drm_writeback_connector *wb_conn = drm_connector_to_writeback(connector);
+ struct amdgpu_crtc *acrtc;
+ struct dc_writeback_info *wb_info;
+ struct pipe_ctx *pipe = NULL;
+ struct amdgpu_framebuffer *afb;
+ int i = 0;
+
+ wb_info = kzalloc(sizeof(*wb_info), GFP_KERNEL);
+ if (!wb_info) {
+ DRM_ERROR("Failed to allocate wb_info\n");
+ return;
+ }
+
+ acrtc = to_amdgpu_crtc(wb_conn->encoder.crtc);
+ if (!acrtc) {
+ DRM_ERROR("no amdgpu_crtc found\n");
+ return;
+ }
+
+ afb = to_amdgpu_framebuffer(new_con_state->writeback_job->fb);
+ if (!afb) {
+ DRM_ERROR("No amdgpu_framebuffer found\n");
+ return;
+ }
+
+ for (i = 0; i < MAX_PIPES; i++) {
+ if (dm->dc->current_state->res_ctx.pipe_ctx[i].stream == crtc_state->stream) {
+ pipe = &dm->dc->current_state->res_ctx.pipe_ctx[i];
+ break;
+ }
+ }
+
+ /* fill in wb_info */
+ wb_info->wb_enabled = true;
+
+ wb_info->dwb_pipe_inst = 0;
+ wb_info->dwb_params.dwbscl_black_color = 0;
+ wb_info->dwb_params.hdr_mult = 0x1F000;
+ wb_info->dwb_params.csc_params.gamut_adjust_type = CM_GAMUT_ADJUST_TYPE_BYPASS;
+ wb_info->dwb_params.csc_params.gamut_coef_format = CM_GAMUT_REMAP_COEF_FORMAT_S2_13;
+ wb_info->dwb_params.output_depth = DWB_OUTPUT_PIXEL_DEPTH_10BPC;
+ wb_info->dwb_params.cnv_params.cnv_out_bpc = DWB_CNV_OUT_BPC_10BPC;
+
+ /* width & height from crtc */
+ wb_info->dwb_params.cnv_params.src_width = acrtc->base.mode.crtc_hdisplay;
+ wb_info->dwb_params.cnv_params.src_height = acrtc->base.mode.crtc_vdisplay;
+ wb_info->dwb_params.dest_width = acrtc->base.mode.crtc_hdisplay;
+ wb_info->dwb_params.dest_height = acrtc->base.mode.crtc_vdisplay;
+
+ wb_info->dwb_params.cnv_params.crop_en = false;
+ wb_info->dwb_params.stereo_params.stereo_enabled = false;
+
+ wb_info->dwb_params.cnv_params.out_max_pix_val = 0x3ff; // 10 bits
+ wb_info->dwb_params.cnv_params.out_min_pix_val = 0;
+ wb_info->dwb_params.cnv_params.fc_out_format = DWB_OUT_FORMAT_32BPP_ARGB;
+ wb_info->dwb_params.cnv_params.out_denorm_mode = DWB_OUT_DENORM_BYPASS;
+
+ wb_info->dwb_params.out_format = dwb_scaler_mode_bypass444;
+
+ wb_info->dwb_params.capture_rate = dwb_capture_rate_0;
+
+ wb_info->dwb_params.scaler_taps.h_taps = 4;
+ wb_info->dwb_params.scaler_taps.v_taps = 4;
+ wb_info->dwb_params.scaler_taps.h_taps_c = 2;
+ wb_info->dwb_params.scaler_taps.v_taps_c = 2;
+ wb_info->dwb_params.subsample_position = DWB_INTERSTITIAL_SUBSAMPLING;
+
+ wb_info->mcif_buf_params.luma_pitch = afb->base.pitches[0];
+ wb_info->mcif_buf_params.chroma_pitch = afb->base.pitches[1];
+
+ for (i = 0; i < DWB_MCIF_BUF_COUNT; i++) {
+ wb_info->mcif_buf_params.luma_address[i] = afb->address;
+ wb_info->mcif_buf_params.chroma_address[i] = 0;
+ }
+
+ wb_info->mcif_buf_params.p_vmid = 1;
+ wb_info->mcif_warmup_params.p_vmid = 1;
+ wb_info->writeback_source_plane = pipe->plane_state;
+
+ dc_stream_add_writeback(dm->dc, crtc_state->stream, wb_info);
+
+ acrtc->wb_pending = true;
+ acrtc->wb_conn = wb_conn;
+ drm_writeback_queue_job(wb_conn, new_con_state);
+}
+
/**
* amdgpu_dm_atomic_commit_tail() - AMDgpu DM's commit tail implementation.
* @state: The atomic state to commit
@@ -8982,6 +9120,27 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
amdgpu_dm_commit_planes(state, dev, dm, crtc, wait_for_vblank);
}
+ /* Enable writeback */
+ for_each_new_connector_in_state(state, connector, new_con_state, i) {
+ struct dm_connector_state *dm_new_con_state = to_dm_connector_state(new_con_state);
+ struct amdgpu_crtc *acrtc = to_amdgpu_crtc(dm_new_con_state->base.crtc);
+
+ if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
+ continue;
+
+ if (!new_con_state->writeback_job)
+ continue;
+
+ new_crtc_state = NULL;
+
+ if (acrtc)
+ new_crtc_state = drm_atomic_get_new_crtc_state(state, &acrtc->base);
+
+ dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
+
+ dm_set_writeback(dm, dm_new_crtc_state, connector, new_con_state);
+ }
+
/* Update audio instances for each connector. */
amdgpu_dm_commit_audio(dev, state);
--
2.41.0
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