drm/amd/display: Update phantom pipe enable / disable sequence

Previously we would call apply_ctx_to_hw to enable and disable
phantom pipes. However, apply_ctx_to_hw can potentially update
non-phantom pipes as well which is undesired. Instead of calling
apply_ctx_to_hw as a whole, call the relevant helpers for each
phantom pipe when enabling / disabling which will avoid us modifying
hardware state for non-phantom pipes unknowingly.

The use case is for an FRL display where FRL_Update is requested
by the display. In this case link_state_valid flag is cleared in
a passive callback thread and should be handled in the next stream /
link update. However, due to the call to apply_ctx_to_hw for the
phantom pipes during a flip, the main pipes were modified outside
of the desired sequence (driver does not handle link_state_valid = 0
on flips).

Cc: stable@vger.kernel.org # 6.6+
Reviewed-by: Samson Tam <samson.tam@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index c81f8af..7251290 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -3851,7 +3851,9 @@ static void commit_planes_for_stream(struct dc *dc,
                 * programming has completed (we turn on phantom OTG in order
                 * to complete the plane disable for phantom pipes).
                 */
-               dc->hwss.apply_ctx_to_hw(dc, context);
+
+               if (dc->hwss.disable_phantom_streams)
+                       dc->hwss.disable_phantom_streams(dc, context);
        }
 
        if (update_type != UPDATE_TYPE_FAST)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
index 3255034..9d5df4c 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
@@ -1529,7 +1529,7 @@ static enum dc_status dce110_enable_stream_timing(
        return DC_OK;
 }
 
-static enum dc_status apply_single_controller_ctx_to_hw(
+enum dc_status dce110_apply_single_controller_ctx_to_hw(
                struct pipe_ctx *pipe_ctx,
                struct dc_state *context,
                struct dc *dc)
@@ -2356,7 +2356,7 @@ enum dc_status dce110_apply_ctx_to_hw(
                if (pipe_ctx->top_pipe || pipe_ctx->prev_odm_pipe)
                        continue;
 
-               status = apply_single_controller_ctx_to_hw(
+               status = dce110_apply_single_controller_ctx_to_hw(
                                pipe_ctx,
                                context,
                                dc);

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.h b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.h
index 08028a1..ed3cc36 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.h
@@ -39,6 +39,10 @@ enum dc_status dce110_apply_ctx_to_hw(
                struct dc *dc,
                struct dc_state *context);
 
+enum dc_status dce110_apply_single_controller_ctx_to_hw(
+               struct pipe_ctx *pipe_ctx,
+               struct dc_state *context,
+               struct dc *dc);
 
 void dce110_enable_stream(struct pipe_ctx *pipe_ctx);
 

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
index 7557e58..bc0a219 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
@@ -2671,7 +2671,7 @@ void dcn20_setup_vupdate_interrupt(struct dc *dc, struct pipe_ctx *pipe_ctx)
                tg->funcs->setup_vertical_interrupt2(tg, start_line);
 }
 
-static void dcn20_reset_back_end_for_pipe(
+void dcn20_reset_back_end_for_pipe(
                struct dc *dc,
                struct pipe_ctx *pipe_ctx,
                struct dc_state *context)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.h b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.h
index 9031632..5c874f7 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.h
@@ -86,6 +86,10 @@ enum dc_status dcn20_enable_stream_timing(
 void dcn20_disable_stream_gating(struct dc *dc, struct pipe_ctx *pipe_ctx);
 void dcn20_enable_stream_gating(struct dc *dc, struct pipe_ctx *pipe_ctx);
 void dcn20_setup_vupdate_interrupt(struct dc *dc, struct pipe_ctx *pipe_ctx);
+void dcn20_reset_back_end_for_pipe(
+               struct dc *dc,
+               struct pipe_ctx *pipe_ctx,
+               struct dc_state *context);
 void dcn20_init_blank(
                struct dc *dc,
                struct timing_generator *tg);

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
index 6c9299c..aa36d7a 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
@@ -1474,9 +1474,44 @@ void dcn32_update_dsc_pg(struct dc *dc,
        }
 }
 
+void dcn32_disable_phantom_streams(struct dc *dc, struct dc_state *context)
+{
+       struct dce_hwseq *hws = dc->hwseq;
+       int i;
+
+       for (i = dc->res_pool->pipe_count - 1; i >= 0 ; i--) {
+               struct pipe_ctx *pipe_ctx_old =
+                       &dc->current_state->res_ctx.pipe_ctx[i];
+               struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
+
+               if (!pipe_ctx_old->stream)
+                       continue;
+
+               if (dc_state_get_pipe_subvp_type(dc->current_state, pipe_ctx_old) != SUBVP_PHANTOM)
+                       continue;
+
+               if (pipe_ctx_old->top_pipe || pipe_ctx_old->prev_odm_pipe)
+                       continue;
+
+               if (!pipe_ctx->stream || pipe_need_reprogram(pipe_ctx_old, pipe_ctx) ||
+                               (pipe_ctx->stream && dc_state_get_pipe_subvp_type(context, pipe_ctx) != SUBVP_PHANTOM)) {
+                       struct clock_source *old_clk = pipe_ctx_old->clock_source;
+
+                       if (hws->funcs.reset_back_end_for_pipe)
+                               hws->funcs.reset_back_end_for_pipe(dc, pipe_ctx_old, dc->current_state);
+                       if (hws->funcs.enable_stream_gating)
+                               hws->funcs.enable_stream_gating(dc, pipe_ctx_old);
+                       if (old_clk)
+                               old_clk->funcs->cs_power_down(old_clk);
+               }
+       }
+}
+
 void dcn32_enable_phantom_streams(struct dc *dc, struct dc_state *context)
 {
        unsigned int i;
+       enum dc_status status = DC_OK;
+       struct dce_hwseq *hws = dc->hwseq;
 
        for (i = 0; i < dc->res_pool->pipe_count; i++) {
                struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
@@ -1497,16 +1532,39 @@ void dcn32_enable_phantom_streams(struct dc *dc, struct dc_state *context)
                }
        }
        for (i = 0; i < dc->res_pool->pipe_count; i++) {
-               struct pipe_ctx *new_pipe = &context->res_ctx.pipe_ctx[i];
-
-               if (new_pipe->stream && dc_state_get_pipe_subvp_type(context, new_pipe) == SUBVP_PHANTOM) {
-                       // If old context or new context has phantom pipes, apply
-                       // the phantom timings now. We can't change the phantom
-                       // pipe configuration safely without driver acquiring
-                       // the DMCUB lock first.
-                       dc->hwss.apply_ctx_to_hw(dc, context);
-                       break;
+               struct pipe_ctx *pipe_ctx_old =
+                                       &dc->current_state->res_ctx.pipe_ctx[i];
+               struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
+
+               if (pipe_ctx->stream == NULL)
+                       continue;
+
+               if (dc_state_get_pipe_subvp_type(context, pipe_ctx) != SUBVP_PHANTOM)
+                       continue;
+
+               if (pipe_ctx->stream == pipe_ctx_old->stream &&
+                       pipe_ctx->stream->link->link_state_valid) {
+                       continue;
                }
+
+               if (pipe_ctx_old->stream && !pipe_need_reprogram(pipe_ctx_old, pipe_ctx))
+                       continue;
+
+               if (pipe_ctx->top_pipe || pipe_ctx->prev_odm_pipe)
+                       continue;
+
+               if (hws->funcs.apply_single_controller_ctx_to_hw)
+                       status = hws->funcs.apply_single_controller_ctx_to_hw(
+                                       pipe_ctx,
+                                       context,
+                                       dc);
+
+               ASSERT(status == DC_OK);
+
+#ifdef CONFIG_DRM_AMD_DC_FP
+               if (hws->funcs.resync_fifo_dccg_dio)
+                       hws->funcs.resync_fifo_dccg_dio(hws, dc, context);
+#endif
        }
 }
 

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h
index cecf7f0..069e20b 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h
@@ -111,6 +111,8 @@ void dcn32_update_dsc_pg(struct dc *dc,
 
 void dcn32_enable_phantom_streams(struct dc *dc, struct dc_state *context);
 
+void dcn32_disable_phantom_streams(struct dc *dc, struct dc_state *context);
+
 void dcn32_init_blank(
                struct dc *dc,
                struct timing_generator *tg);

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c
index 0980df6..2b07312 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c
@@ -109,6 +109,7 @@ static const struct hw_sequencer_funcs dcn32_funcs = {
        .get_dcc_en_bits = dcn10_get_dcc_en_bits,
        .commit_subvp_config = dcn32_commit_subvp_config,
        .enable_phantom_streams = dcn32_enable_phantom_streams,
+       .disable_phantom_streams = dcn32_disable_phantom_streams,
        .subvp_pipe_control_lock = dcn32_subvp_pipe_control_lock,
        .update_visual_confirm_color = dcn10_update_visual_confirm_color,
        .subvp_pipe_control_lock_fast = dcn32_subvp_pipe_control_lock_fast,
@@ -159,6 +160,8 @@ static const struct hwseq_private_funcs dcn32_private_funcs = {
        .set_pixels_per_cycle = dcn32_set_pixels_per_cycle,
        .resync_fifo_dccg_dio = dcn32_resync_fifo_dccg_dio,
        .is_dp_dig_pixel_rate_div_policy = dcn32_is_dp_dig_pixel_rate_div_policy,
+       .apply_single_controller_ctx_to_hw = dce110_apply_single_controller_ctx_to_hw,
+       .reset_back_end_for_pipe = dcn20_reset_back_end_for_pipe,
 };
 
 void dcn32_hw_sequencer_init_functions(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 91b1b43..f89f205 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
@@ -381,6 +381,7 @@ struct hw_sequencer_funcs {
                        struct dc_cursor_attributes *cursor_attr);
        void (*commit_subvp_config)(struct dc *dc, struct dc_state *context);
        void (*enable_phantom_streams)(struct dc *dc, struct dc_state *context);
+       void (*disable_phantom_streams)(struct dc *dc, struct dc_state *context);
        void (*subvp_pipe_control_lock)(struct dc *dc,
                        struct dc_state *context,
                        bool lock,

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer_private.h b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer_private.h
index 6137cf0..b3c62a8 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer_private.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer_private.h
@@ -165,8 +165,15 @@ struct hwseq_private_funcs {
        void (*set_pixels_per_cycle)(struct pipe_ctx *pipe_ctx);
        void (*resync_fifo_dccg_dio)(struct dce_hwseq *hws, struct dc *dc,
                        struct dc_state *context);
+       enum dc_status (*apply_single_controller_ctx_to_hw)(
+                       struct pipe_ctx *pipe_ctx,
+                       struct dc_state *context,
+                       struct dc *dc);
        bool (*is_dp_dig_pixel_rate_div_policy)(struct pipe_ctx *pipe_ctx);
 #endif
+       void (*reset_back_end_for_pipe)(struct dc *dc,
+                       struct pipe_ctx *pipe_ctx,
+                       struct dc_state *context);
 };
 
 struct dce_hwseq {