From: Rafal Ostrowski <[email protected]>

[Why]
The dc_fast_update intermediate struct created code duplication and
complexity with multiple classification paths (populate_fast_updates,
fast_nonaddr_updates_exist, full_update_required). This refactoring
simplifies the update classification system by consolidating to a
single path.

[How]
Remove entire dc_fast_update struct and associated helper functions:
- populate_fast_updates
- fast_nonaddr_updates_exist
- full_update_required

Refactor check_update_surfaces_for_stream as the
single classification path with explicit handling for func_shaper,
lut3d_func, cursor_csc_color_matrix_change, and
scaler_sharpener_update. Add reserved bitfields to
surface_update_flags and stream_update_flags unions for completeness
guards. Extract dc_check_address_only_update and
dc_check_update_surfaces_for_stream as public.
Add comprehensive test coverage with parameterized tests
for all FAST flags, update classification tests
for MED/FULL paths, and completeness guard tests.

Reviewed-by: Alvin Lee <[email protected]>
Signed-off-by: Rafal Ostrowski <[email protected]>
Signed-off-by: Tom Chung <[email protected]>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c      | 246 ++----------------
 drivers/gpu/drm/amd/display/dc/dc.h           |  31 ---
 drivers/gpu/drm/amd/display/dc/dc_stream.h    |   3 +
 .../amd/display/dc/hwss/dcn35/dcn35_hwseq.c   |  17 +-
 .../amd/display/dc/hwss/dcn35/dcn35_hwseq.h   |   2 +-
 .../amd/display/dc/hwss/dcn401/dcn401_hwseq.c |  12 +-
 .../amd/display/dc/hwss/dcn401/dcn401_hwseq.h |   2 +-
 .../amd/display/dc/hwss/dcn42/dcn42_hwseq.c   |  13 +-
 .../amd/display/dc/hwss/dcn42/dcn42_hwseq.h   |   2 +-
 .../drm/amd/display/dc/hwss/hw_sequencer.h    |   2 +-
 10 files changed, 58 insertions(+), 272 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c 
b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 68f228014305..f0f9f6e8de06 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2273,6 +2273,7 @@ static enum dc_status dc_commit_state_no_check(struct dc 
*dc, struct dc_state *c
        struct dc_stream_state *dc_streams[MAX_STREAMS] = {0};
        struct dc_state *old_state;
        bool subvp_prev_use = false;
+       bool dmub_locked = false;
 
        dc_z10_restore(dc);
        dc_allow_idle_optimizations(dc, false);
@@ -2324,7 +2325,7 @@ static enum dc_status dc_commit_state_no_check(struct dc 
*dc, struct dc_state *c
        if (dc->hwss.subvp_pipe_control_lock)
                dc->hwss.subvp_pipe_control_lock(dc, context, true, true, NULL, 
subvp_prev_use);
        if (dc->hwss.dmub_hw_control_lock)
-               dc->hwss.dmub_hw_control_lock(dc, context, true);
+               dmub_locked = dc->hwss.dmub_hw_control_lock(dc, context, true);
 
        if (dc->hwss.update_dsc_pg)
                dc->hwss.update_dsc_pg(dc, context, false);
@@ -2400,7 +2401,7 @@ static enum dc_status dc_commit_state_no_check(struct dc 
*dc, struct dc_state *c
                dc->hwss.commit_subvp_config(dc, context);
        if (dc->hwss.subvp_pipe_control_lock)
                dc->hwss.subvp_pipe_control_lock(dc, context, false, true, 
NULL, subvp_prev_use);
-       if (dc->hwss.dmub_hw_control_lock)
+       if (dc->hwss.dmub_hw_control_lock && dmub_locked)
                dc->hwss.dmub_hw_control_lock(dc, context, false);
 
        for (i = 0; i < context->stream_count; i++) {
@@ -3178,8 +3179,10 @@ static struct dc_update_descriptor 
check_update_surfaces_for_stream(
                                stream_update->vrr_active_variable || 
stream_update->vrr_active_fixed))
                        su_flags->bits.fams_changed = 1;
 
-               if (stream_update->scaler_sharpener_update)
+               if (stream_update->scaler_sharpener_update) {
                        su_flags->bits.scaler_sharpener = 1;
+                       elevate_update_type(&overall_type, UPDATE_TYPE_FULL, 
LOCK_DESCRIPTOR_STREAM);
+               }
 
                if (stream_update->sharpening_required)
                        su_flags->bits.sharpening_required = 1;
@@ -3244,6 +3247,16 @@ static struct dc_update_descriptor 
check_update_surfaces_for_stream(
                        su_flags->bits.cursor_pos = 1;
                        elevate_update_type(&overall_type, UPDATE_TYPE_FAST, 
LOCK_DESCRIPTOR_STREAM);
                }
+
+               if (stream_update->func_shaper) {
+                       su_flags->bits.func_shaper = 1;
+                       elevate_update_type(&overall_type, UPDATE_TYPE_FULL, 
LOCK_DESCRIPTOR_STREAM);
+               }
+
+               if (stream_update->lut3d_func) {
+                       su_flags->bits.lut3d_func = 1;
+                       elevate_update_type(&overall_type, UPDATE_TYPE_FULL, 
LOCK_DESCRIPTOR_STREAM);
+               }
        }
 
        for (int i = 0 ; i < surface_count; i++) {
@@ -4872,6 +4885,7 @@ static void commit_planes_for_stream(struct dc *dc,
        bool should_lock_all_pipes = (update_type != UPDATE_TYPE_FAST);
        bool subvp_prev_use = false;
        bool subvp_curr_use = false;
+       bool dmub_locked = false;
        uint8_t current_stream_mask = 0;
 
        if (should_lock_all_pipes)
@@ -4979,7 +4993,7 @@ static void commit_planes_for_stream(struct dc *dc,
                        dc->hwss.subvp_pipe_control_lock(dc, context, true, 
should_lock_all_pipes, NULL, subvp_prev_use);
 
                if (dc->hwss.dmub_hw_control_lock)
-                       dc->hwss.dmub_hw_control_lock(dc, context, true);
+                       dmub_locked = dc->hwss.dmub_hw_control_lock(dc, 
context, true);
 
                dc->hwss.interdependent_update_lock(dc, context, true);
        } else {
@@ -4987,7 +5001,7 @@ static void commit_planes_for_stream(struct dc *dc,
                        dc->hwss.subvp_pipe_control_lock(dc, context, true, 
should_lock_all_pipes, top_pipe_to_program, subvp_prev_use);
 
                if (dc->hwss.dmub_hw_control_lock)
-                       dc->hwss.dmub_hw_control_lock(dc, context, true);
+                       dmub_locked = dc->hwss.dmub_hw_control_lock(dc, 
context, true);
 
                /* Lock the top pipe while updating plane addrs, since freesync 
requires
                 *  plane addr update event triggers to be synchronized.
@@ -5030,7 +5044,7 @@ static void commit_planes_for_stream(struct dc *dc,
                        dc->hwss.subvp_pipe_control_lock(dc, context, false, 
should_lock_all_pipes,
                                                         NULL, subvp_prev_use);
 
-               if (dc->hwss.dmub_hw_control_lock)
+               if (dc->hwss.dmub_hw_control_lock && dmub_locked)
                        dc->hwss.dmub_hw_control_lock(dc, context, false);
                return;
        }
@@ -5266,12 +5280,12 @@ static void commit_planes_for_stream(struct dc *dc,
        if (should_lock_all_pipes && dc->hwss.interdependent_update_lock) {
                if (dc->hwss.subvp_pipe_control_lock)
                        dc->hwss.subvp_pipe_control_lock(dc, context, false, 
should_lock_all_pipes, NULL, subvp_prev_use);
-               if (dc->hwss.dmub_hw_control_lock)
+               if (dc->hwss.dmub_hw_control_lock && dmub_locked)
                        dc->hwss.dmub_hw_control_lock(dc, context, false);
        } else {
                if (dc->hwss.subvp_pipe_control_lock)
                        dc->hwss.subvp_pipe_control_lock(dc, context, false, 
should_lock_all_pipes, top_pipe_to_program, subvp_prev_use);
-               if (dc->hwss.dmub_hw_control_lock)
+               if (dc->hwss.dmub_hw_control_lock && dmub_locked)
                        dc->hwss.dmub_hw_control_lock(dc, context, false);
        }
 
@@ -5730,127 +5744,6 @@ static bool commit_minimal_transition_state(struct dc 
*dc,
        return true;
 }
 
-void populate_fast_updates(struct dc_fast_update *fast_update,
-               struct dc_surface_update *srf_updates,
-               int surface_count,
-               struct dc_stream_update *stream_update)
-{
-       int i = 0;
-
-       if (stream_update) {
-               fast_update[0].out_transfer_func = 
stream_update->out_transfer_func;
-               fast_update[0].output_csc_transform = 
stream_update->output_csc_transform;
-               fast_update[0].cursor_attributes = 
stream_update->cursor_attributes;
-               fast_update[0].cursor_position = stream_update->cursor_position;
-               fast_update[0].periodic_interrupt = 
stream_update->periodic_interrupt;
-               fast_update[0].dither_option = stream_update->dither_option;
-               fast_update[0].gamut_remap = stream_update->gamut_remap;
-               fast_update[0].vrr_infopacket = stream_update->vrr_infopacket;
-               fast_update[0].vsc_infopacket = stream_update->vsc_infopacket;
-               fast_update[0].vsp_infopacket = stream_update->vsp_infopacket;
-               fast_update[0].hfvsif_infopacket = 
stream_update->hfvsif_infopacket;
-               fast_update[0].vtem_infopacket = stream_update->vtem_infopacket;
-               fast_update[0].adaptive_sync_infopacket = 
stream_update->adaptive_sync_infopacket;
-               fast_update[0].avi_infopacket = stream_update->avi_infopacket;
-               fast_update[0].hdr_static_metadata = 
stream_update->hdr_static_metadata;
-       } else {
-               fast_update[0].out_transfer_func = NULL;
-               fast_update[0].output_csc_transform = NULL;
-               fast_update[0].cursor_attributes = NULL;
-               fast_update[0].cursor_position = NULL;
-               fast_update[0].periodic_interrupt = NULL;
-               fast_update[0].dither_option = NULL;
-               fast_update[0].gamut_remap = NULL;
-               fast_update[0].vrr_infopacket = NULL;
-               fast_update[0].vsc_infopacket = NULL;
-               fast_update[0].vsp_infopacket = NULL;
-               fast_update[0].hfvsif_infopacket = NULL;
-               fast_update[0].vtem_infopacket = NULL;
-               fast_update[0].adaptive_sync_infopacket = NULL;
-               fast_update[0].avi_infopacket = NULL;
-               fast_update[0].hdr_static_metadata = NULL;
-       }
-
-       for (i = 0; i < surface_count; i++) {
-               fast_update[i].flip_addr = srf_updates[i].flip_addr;
-               fast_update[i].gamma = srf_updates[i].gamma;
-               fast_update[i].gamut_remap_matrix = 
srf_updates[i].gamut_remap_matrix;
-               fast_update[i].input_csc_color_matrix = 
srf_updates[i].input_csc_color_matrix;
-               fast_update[i].coeff_reduction_factor = 
srf_updates[i].coeff_reduction_factor;
-               fast_update[i].cursor_csc_color_matrix = 
srf_updates[i].cursor_csc_color_matrix;
-               fast_update[i].cm_hist_control = srf_updates[i].cm_hist_control;
-       }
-}
-
-static bool fast_updates_exist(const struct dc_fast_update *fast_update, int 
surface_count)
-{
-       int i;
-
-       if (fast_update[0].out_transfer_func ||
-               fast_update[0].output_csc_transform ||
-               fast_update[0].cursor_attributes ||
-               fast_update[0].cursor_position ||
-               fast_update[0].periodic_interrupt ||
-               fast_update[0].dither_option ||
-               fast_update[0].gamut_remap ||
-               fast_update[0].vrr_infopacket ||
-               fast_update[0].vsc_infopacket ||
-               fast_update[0].vsp_infopacket ||
-               fast_update[0].hfvsif_infopacket ||
-               fast_update[0].vtem_infopacket ||
-               fast_update[0].adaptive_sync_infopacket ||
-               fast_update[0].avi_infopacket ||
-               fast_update[0].hdr_static_metadata)
-               return true;
-
-       for (i = 0; i < surface_count; i++) {
-               if (fast_update[i].flip_addr ||
-                               fast_update[i].gamma ||
-                               fast_update[i].gamut_remap_matrix ||
-                               fast_update[i].input_csc_color_matrix ||
-                               fast_update[i].cursor_csc_color_matrix ||
-                               fast_update[i].cm_hist_control ||
-                               fast_update[i].coeff_reduction_factor)
-                       return true;
-       }
-
-       return false;
-}
-
-bool fast_nonaddr_updates_exist(struct dc_fast_update *fast_update, int 
surface_count)
-{
-       int i;
-
-       if (fast_update[0].out_transfer_func ||
-               fast_update[0].output_csc_transform ||
-               fast_update[0].gamut_remap ||
-               fast_update[0].cursor_attributes ||
-               fast_update[0].cursor_position ||
-               fast_update[0].periodic_interrupt ||
-               fast_update[0].dither_option ||
-               fast_update[0].vrr_infopacket ||
-               fast_update[0].vsc_infopacket ||
-               fast_update[0].vsp_infopacket ||
-               fast_update[0].hfvsif_infopacket ||
-               fast_update[0].vtem_infopacket ||
-               fast_update[0].adaptive_sync_infopacket ||
-               fast_update[0].avi_infopacket ||
-               fast_update[0].hdr_static_metadata)
-               return true;
-
-       for (i = 0; i < surface_count; i++) {
-               if (fast_update[i].input_csc_color_matrix ||
-                               fast_update[i].gamma ||
-                               fast_update[i].gamut_remap_matrix ||
-                               fast_update[i].coeff_reduction_factor ||
-                               fast_update[i].cm_hist_control ||
-                               fast_update[i].cursor_csc_color_matrix)
-                       return true;
-       }
-
-       return false;
-}
-
 static bool full_update_required_weak(
                const struct dc *dc,
                const struct dc_surface_update *srf_updates,
@@ -5879,67 +5772,6 @@ static bool full_update_required_weak(
        return false;
 }
 
-static bool full_update_required(
-               const struct dc *dc,
-               const struct dc_surface_update *srf_updates,
-               int surface_count,
-               const struct dc_stream_update *stream_update,
-               const struct dc_stream_state *stream)
-{
-       if (full_update_required_weak(dc, srf_updates, surface_count, 
stream_update, stream))
-               return true;
-
-       for (int i = 0; i < surface_count; i++) {
-               if (srf_updates &&
-                               (srf_updates[i].plane_info ||
-                               srf_updates[i].scaling_info ||
-                               (srf_updates[i].hdr_mult.value &&
-                               srf_updates[i].hdr_mult.value != 
srf_updates->surface->hdr_mult.value) ||
-                               (srf_updates[i].sdr_white_level_nits &&
-                               srf_updates[i].sdr_white_level_nits != 
srf_updates->surface->sdr_white_level_nits) ||
-                               srf_updates[i].in_transfer_func ||
-                               srf_updates[i].surface->force_full_update ||
-                               (srf_updates[i].flip_addr &&
-                               srf_updates[i].flip_addr->address.tmz_surface 
!= srf_updates[i].surface->address.tmz_surface)))
-                       return true;
-       }
-
-       if (stream_update &&
-                       (((stream_update->src.height != 0 && 
stream_update->src.width != 0) ||
-                       (stream_update->dst.height != 0 && 
stream_update->dst.width != 0) ||
-                       stream_update->integer_scaling_update) ||
-                       stream_update->abm_level ||
-                       stream_update->dpms_off ||
-                       stream_update->allow_freesync ||
-                       stream_update->vrr_active_variable ||
-                       stream_update->vrr_active_fixed ||
-                       stream_update->output_color_space ||
-                       stream_update->wb_update ||
-                       stream_update->dsc_config ||
-                       stream_update->mst_bw_update ||
-                       stream_update->func_shaper ||
-                       stream_update->lut3d_func ||
-                       stream_update->pending_test_pattern ||
-                       stream_update->crtc_timing_adjust ||
-                       stream_update->scaler_sharpener_update ||
-                       stream_update->hw_cursor_req))
-               return true;
-
-       return false;
-}
-
-static bool fast_update_only(
-               const struct dc *dc,
-               const struct dc_fast_update *fast_update,
-               const struct dc_surface_update *srf_updates,
-               int surface_count,
-               const struct dc_stream_update *stream_update,
-               const struct dc_stream_state *stream)
-{
-       return fast_updates_exist(fast_update, surface_count)
-                       && !full_update_required(dc, srf_updates, 
surface_count, stream_update, stream);
-}
-
 static bool update_planes_and_stream_v2(struct dc *dc,
                struct dc_surface_update *srf_updates, int surface_count,
                struct dc_stream_state *stream,
@@ -5947,7 +5779,6 @@ static bool update_planes_and_stream_v2(struct dc *dc,
 {
        struct dc_state *context;
        enum dc_update_type update_type;
-       struct dc_fast_update fast_update[MAX_SURFACES] = {0};
 
        /* In cases where MPO and split or ODM are used transitions can
         * cause underflow. Apply stream configuration with minimal pipe
@@ -5955,11 +5786,7 @@ static bool update_planes_and_stream_v2(struct dc *dc,
         */
        bool force_minimal_pipe_splitting = 0;
        bool is_plane_addition = 0;
-       bool is_fast_update_only;
 
-       populate_fast_updates(fast_update, srf_updates, surface_count, 
stream_update);
-       is_fast_update_only = fast_update_only(dc, fast_update, srf_updates,
-                       surface_count, stream_update, stream);
        force_minimal_pipe_splitting = could_mpcc_tree_change_for_active_pipes(
                        dc,
                        stream,
@@ -5997,7 +5824,7 @@ static bool update_planes_and_stream_v2(struct dc *dc,
                commit_minimal_transition_state_in_dc_update(dc, context, 
stream,
                                srf_updates, surface_count);
 
-       if (is_fast_update_only && !dc->check_config.enable_legacy_fast_update) 
{
+       if (update_type == UPDATE_TYPE_FAST && 
!dc->check_config.enable_legacy_fast_update) {
                commit_planes_for_stream_fast(dc,
                                srf_updates,
                                surface_count,
@@ -6033,13 +5860,8 @@ static void 
commit_planes_and_stream_update_on_current_context(struct dc *dc,
                struct dc_stream_update *stream_update,
                enum dc_update_type update_type)
 {
-       struct dc_fast_update fast_update[MAX_SURFACES] = {0};
-
        ASSERT(update_type < UPDATE_TYPE_FULL);
-       populate_fast_updates(fast_update, srf_updates, surface_count,
-                       stream_update);
-       if (fast_update_only(dc, fast_update, srf_updates, surface_count,
-                       stream_update, stream) &&
+       if (update_type == UPDATE_TYPE_FAST &&
                        !dc->check_config.enable_legacy_fast_update)
                commit_planes_for_stream_fast(dc,
                                srf_updates,
@@ -8235,23 +8057,6 @@ static bool update_planes_and_stream_prepare_v3(
        ASSERT(scratch->flow == UPDATE_V3_FLOW_INVALID);
        dc_exit_ips_for_hw_access(scratch->dc);
 
-       /* HWSS path determination needs to be done prior to updating the 
surface and stream states. */
-       struct dc_fast_update fast_update[MAX_SURFACES] = { 0 };
-
-       populate_fast_updates(fast_update,
-                             scratch->surface_updates,
-                             scratch->surface_count,
-                             scratch->stream_update);
-
-       const bool is_hwss_fast_path_only =
-               fast_update_only(scratch->dc,
-                                fast_update,
-                                scratch->surface_updates,
-                                scratch->surface_count,
-                                scratch->stream_update,
-                                scratch->stream) &&
-               !scratch->dc->check_config.enable_legacy_fast_update;
-
        if (!update_planes_and_stream_state(
                        scratch->dc,
                        scratch->surface_updates,
@@ -8267,7 +8072,8 @@ static bool update_planes_and_stream_prepare_v3(
        if (scratch->new_context == scratch->dc->current_state) {
                ASSERT(scratch->update_type < UPDATE_TYPE_FULL);
 
-               scratch->flow = is_hwss_fast_path_only
+               scratch->flow = (scratch->update_type == UPDATE_TYPE_FAST &&
+                               
!scratch->dc->check_config.enable_legacy_fast_update)
                                ? UPDATE_V3_FLOW_NO_NEW_CONTEXT_CONTEXT_FAST
                                : UPDATE_V3_FLOW_NO_NEW_CONTEXT_CONTEXT_FULL;
                return true;
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h 
b/drivers/gpu/drm/amd/display/dc/dc.h
index 34d4ede12e79..71d3604b020c 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -2089,32 +2089,6 @@ struct dc_scaling_info {
        struct scaling_taps scaling_quality;
 };
 
-struct dc_fast_update {
-       const struct dc_flip_addrs *flip_addr;
-       const struct dc_gamma *gamma;
-       const struct colorspace_transform *gamut_remap_matrix;
-       const struct dc_csc_transform *input_csc_color_matrix;
-       const struct fixed31_32 *coeff_reduction_factor;
-       struct dc_transfer_func *out_transfer_func;
-       struct dc_csc_transform *output_csc_transform;
-       const struct dc_csc_transform *cursor_csc_color_matrix;
-       struct cm_hist_control *cm_hist_control;
-       /* stream-level fast updates */
-       const struct colorspace_transform *gamut_remap;
-       const struct dc_cursor_attributes *cursor_attributes;
-       const struct dc_cursor_position *cursor_position;
-       const struct periodic_interrupt_config *periodic_interrupt;
-       const enum dc_dither_option *dither_option;
-       struct dc_info_packet *vrr_infopacket;
-       struct dc_info_packet *vsc_infopacket;
-       struct dc_info_packet *vsp_infopacket;
-       struct dc_info_packet *hfvsif_infopacket;
-       struct dc_info_packet *vtem_infopacket;
-       struct dc_info_packet *adaptive_sync_infopacket;
-       struct dc_info_packet *avi_infopacket;
-       struct dc_info_packet *hdr_static_metadata;
-};
-
 struct dc_surface_update {
        struct dc_plane_state *surface;
 
@@ -2418,11 +2392,6 @@ bool dc_resource_is_dsc_encoding_supported(const struct 
dc *dc);
 void get_audio_check(struct audio_info *aud_modes,
        struct audio_check *aud_chk);
 
-bool fast_nonaddr_updates_exist(struct dc_fast_update *fast_update, int 
surface_count);
-void populate_fast_updates(struct dc_fast_update *fast_update,
-               struct dc_surface_update *srf_updates,
-               int surface_count,
-               struct dc_stream_update *stream_update);
 /*
  * Set up streams and links associated to drive sinks
  * The streams parameter is an absolute set of all active streams.
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h 
b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 934ae381e730..e0b2224f043a 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -123,6 +123,9 @@ union stream_update_flags {
                uint32_t info_frame : 1;
                uint32_t dmdata : 1;
                uint32_t dither : 1;
+               uint32_t func_shaper : 1;
+               uint32_t lut3d_func : 1;
+               uint32_t reserved : 11; /* adjust when adding new flags */
        } bits;
 
        uint32_t raw;
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
index 09b59466ae7a..29f7c6d49bf0 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
@@ -1836,27 +1836,30 @@ void dcn35_disable_link_output(struct dc_link *link,
        dc->link_srv->dp_trace_source_sequence(link, 
DPCD_SOURCE_SEQ_AFTER_DISABLE_LINK_PHY);
 }
 
-void dcn35_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock)
+bool dcn35_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock)
 {
-       /* use always for now */
        union dmub_inbox0_cmd_lock_hw hw_lock_cmd = { 0 };
 
        if (!dc->ctx || !dc->ctx->dmub_srv)
-               return;
+               return false;
 
        /* if not support inbox0 lock, would not use inbox0 lock mechanism  */
        if 
(!dc->ctx->dmub_srv->dmub->meta_info.feature_bits.bits.inbox0_lock_support)
-               return;
+               return false;
 
-       if (!dc_dmub_srv_is_cursor_offload_enabled(dc) &&
-               !dmub_hw_lock_mgr_does_context_require_lock(dc, context))
-               return;
+       if (lock) {
+               if (!dc_dmub_srv_is_cursor_offload_enabled(dc) &&
+                       !dmub_hw_lock_mgr_does_context_require_lock(dc, 
context))
+                       return false;
+       }
 
        hw_lock_cmd.bits.command_code = DMUB_INBOX0_CMD__HW_LOCK;
        hw_lock_cmd.bits.hw_lock_client = HW_LOCK_CLIENT_DRIVER;
        hw_lock_cmd.bits.lock = lock;
        hw_lock_cmd.bits.should_release = !lock;
        dmub_hw_lock_mgr_inbox0_cmd(dc->ctx->dmub_srv, hw_lock_cmd);
+
+       return true;
 }
 
 void dcn35_dmub_hw_control_lock_fast(union block_sequence_params *params)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h
index e402e30f755d..761922e2dade 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h
@@ -115,7 +115,7 @@ void dcn35_program_cursor_offload_now(struct dc *dc, const 
struct pipe_ctx *pipe
 void dcn35_disable_link_output(struct dc_link *link,
                const struct link_resource *link_res,
                enum signal_type signal);
-void dcn35_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock);
+bool dcn35_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock);
 void dcn35_dmub_hw_control_lock_fast(union block_sequence_params *params);
 
 #endif /* __DC_HWSS_DCN35_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
index f20a7b99d20c..8982ef773832 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
@@ -1567,25 +1567,27 @@ void dcn401_optimize_bandwidth_sequence(struct dc *dc,
                                dc->clk_mgr, context, true, seq_state);
 }
 
-void dcn401_dmub_hw_control_lock(struct dc *dc,
+bool dcn401_dmub_hw_control_lock(struct dc *dc,
                struct dc_state *context,
                bool lock)
 {
        (void)context;
-       /* use always for now */
        union dmub_inbox0_cmd_lock_hw hw_lock_cmd = { 0 };
 
        if (!dc->ctx || !dc->ctx->dmub_srv)
-               return;
+               return false;
 
-       if (!dc->debug.fams2_config.bits.enable && 
!dc_dmub_srv_is_cursor_offload_enabled(dc))
-               return;
+       if (lock) {
+               if (!dc->debug.fams2_config.bits.enable && 
!dc_dmub_srv_is_cursor_offload_enabled(dc))
+                       return false;
+       }
 
        hw_lock_cmd.bits.command_code = DMUB_INBOX0_CMD__HW_LOCK;
        hw_lock_cmd.bits.hw_lock_client = HW_LOCK_CLIENT_DRIVER;
        hw_lock_cmd.bits.lock = lock;
        hw_lock_cmd.bits.should_release = !lock;
        dmub_hw_lock_mgr_inbox0_cmd(dc->ctx->dmub_srv, hw_lock_cmd);
+       return true;
 }
 
 void dcn401_dmub_hw_control_lock_fast(union block_sequence_params *params)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h
index 69c7dc73a29a..6d5770c5e377 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h
@@ -77,7 +77,7 @@ void dcn401_optimize_bandwidth_sequence(struct dc *dc,
                struct dc_state *context,
                struct block_sequence_state *seq_state);
 
-void dcn401_dmub_hw_control_lock(struct dc *dc,
+bool dcn401_dmub_hw_control_lock(struct dc *dc,
                struct dc_state *context,
                bool lock);
 void dcn401_fams2_update_config(struct dc *dc, struct dc_state *context, bool 
enable);
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.c
index 13580d9f9303..8582b123c7fe 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.c
@@ -1091,25 +1091,28 @@ void dcn42_setup_stereo(struct pipe_ctx *pipe_ctx, 
struct dc *dc)
 
        return;
 }
-void dcn42_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock)
+bool dcn42_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock)
 {
 
        union dmub_inbox0_cmd_lock_hw hw_lock_cmd = { 0 };
 
        if (!dc->ctx || !dc->ctx->dmub_srv)
-               return;
+               return false;
 
        /* Use helper to check PSR/Replay for all streams in context */
 
-       if (!dc->debug.fams2_config.bits.enable && 
!dc_dmub_srv_is_cursor_offload_enabled(dc)
-               && !dmub_hw_lock_mgr_does_context_require_lock(dc, context))
-               return;
+       if (lock) {
+               if (!dc->debug.fams2_config.bits.enable && 
!dc_dmub_srv_is_cursor_offload_enabled(dc)
+                       && !dmub_hw_lock_mgr_does_context_require_lock(dc, 
context))
+                       return false;
+       }
 
        hw_lock_cmd.bits.command_code = DMUB_INBOX0_CMD__HW_LOCK;
        hw_lock_cmd.bits.hw_lock_client = HW_LOCK_CLIENT_DRIVER;
        hw_lock_cmd.bits.lock = lock;
        hw_lock_cmd.bits.should_release = !lock;
        dmub_hw_lock_mgr_inbox0_cmd(dc->ctx->dmub_srv, hw_lock_cmd);
+       return true;
 }
 
 void dcn42_dmub_hw_control_lock_fast(union block_sequence_params *params)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.h 
b/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.h
index c4cfeed45b19..cf8766f032ac 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.h
@@ -40,7 +40,7 @@ void dcn42_hw_block_power_up(struct dc *dc,
                struct pg_block_update *update_state);
 void dcn42_root_clock_control(struct dc *dc,
                struct pg_block_update *update_state, bool power_on);
-void dcn42_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock);
+bool dcn42_dmub_hw_control_lock(struct dc *dc, struct dc_state *context, bool 
lock);
 void dcn42_dmub_hw_control_lock_fast(union block_sequence_params *params);
 void dcn42_setup_stereo(struct pipe_ctx *pipe_ctx, struct dc *dc);
 void dcn42_power_down_on_boot(struct dc *dc);
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h 
b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
index cdf2562a9a40..c739b3ab716b 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
@@ -1654,7 +1654,7 @@ struct hw_sequencer_funcs {
                        const struct dc_state *new_ctx);
        void (*wait_for_dcc_meta_propagation)(const struct dc *dc,
                const struct pipe_ctx *top_pipe_to_program);
-       void (*dmub_hw_control_lock)(struct dc *dc,
+       bool (*dmub_hw_control_lock)(struct dc *dc,
                        struct dc_state *context,
                        bool lock);
        void (*fams2_update_config)(struct dc *dc,
-- 
2.43.0

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