6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Austin Zheng Austin.Zheng@amd.com
[ Upstream commit 4af0d8ebf74ccbb60d33fdd410891283dd6cb109 ]
[Why] DML21 does not allocate DET evenly between pipes. May result in underflow when unlocking the pipes as DET could be overallocated.
[How] 1. Unlock pipes that have a decreased amount of DET allocation 2. Wait for the double buffer to be updated. 3. Unlock the remaining pipes.
Reviewed-by: Alvin Lee alvin.lee2@amd.com Signed-off-by: Austin Zheng Austin.Zheng@amd.com Signed-off-by: Tom Chung chiahsuan.chung@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/amd/display/dc/core/dc_resource.c | 28 ++++++ .../display/dc/hubbub/dcn401/dcn401_hubbub.c | 23 +++++ .../amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 91 +++++++++++++++++++ .../amd/display/dc/hwss/dcn401/dcn401_hwseq.h | 2 + .../amd/display/dc/hwss/dcn401/dcn401_init.c | 2 +- .../gpu/drm/amd/display/dc/inc/hw/dchubbub.h | 1 + drivers/gpu/drm/amd/display/dc/inc/resource.h | 5 + 7 files changed, 151 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index 913adca531fc4..5ab5866dc73af 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -5275,3 +5275,31 @@ void resource_init_common_dml2_callbacks(struct dc *dc, struct dml2_configuratio dml2_options->svp_pstate.callbacks.remove_phantom_streams_and_planes = &dc_state_remove_phantom_streams_and_planes; dml2_options->svp_pstate.callbacks.release_phantom_streams_and_planes = &dc_state_release_phantom_streams_and_planes; } + +/* Returns number of DET segments allocated for a given OTG_MASTER pipe */ +int resource_calculate_det_for_stream(struct dc_state *state, struct pipe_ctx *otg_master) +{ + struct pipe_ctx *opp_heads[MAX_PIPES]; + struct pipe_ctx *dpp_pipes[MAX_PIPES]; + + int dpp_count = 0; + int det_segments = 0; + + if (!otg_master->stream) + return 0; + + int slice_count = resource_get_opp_heads_for_otg_master(otg_master, + &state->res_ctx, opp_heads); + + for (int slice_idx = 0; slice_idx < slice_count; slice_idx++) { + if (opp_heads[slice_idx]->plane_state) { + dpp_count = resource_get_dpp_pipes_for_opp_head( + opp_heads[slice_idx], + &state->res_ctx, + dpp_pipes); + for (int dpp_idx = 0; dpp_idx < dpp_count; dpp_idx++) + det_segments += dpp_pipes[dpp_idx]->hubp_regs.det_size; + } + } + return det_segments; +} diff --git a/drivers/gpu/drm/amd/display/dc/hubbub/dcn401/dcn401_hubbub.c b/drivers/gpu/drm/amd/display/dc/hubbub/dcn401/dcn401_hubbub.c index 181041d6d177c..70ddc0392a5b6 100644 --- a/drivers/gpu/drm/amd/display/dc/hubbub/dcn401/dcn401_hubbub.c +++ b/drivers/gpu/drm/amd/display/dc/hubbub/dcn401/dcn401_hubbub.c @@ -1170,6 +1170,28 @@ static void dcn401_program_compbuf_segments(struct hubbub *hubbub, unsigned comp } }
+static void dcn401_wait_for_det_update(struct hubbub *hubbub, int hubp_inst) +{ + struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub); + + switch (hubp_inst) { + case 0: + REG_WAIT(DCHUBBUB_DET0_CTRL, DET0_SIZE_CURRENT, hubbub2->det0_size, 1, 100000); /* 1 vupdate at 10hz */ + break; + case 1: + REG_WAIT(DCHUBBUB_DET1_CTRL, DET1_SIZE_CURRENT, hubbub2->det1_size, 1, 100000); + break; + case 2: + REG_WAIT(DCHUBBUB_DET2_CTRL, DET2_SIZE_CURRENT, hubbub2->det2_size, 1, 100000); + break; + case 3: + REG_WAIT(DCHUBBUB_DET3_CTRL, DET3_SIZE_CURRENT, hubbub2->det3_size, 1, 100000); + break; + default: + break; + } +} + static const struct hubbub_funcs hubbub4_01_funcs = { .update_dchub = hubbub2_update_dchub, .init_dchub_sys_ctx = hubbub3_init_dchub_sys_ctx, @@ -1192,6 +1214,7 @@ static const struct hubbub_funcs hubbub4_01_funcs = { .set_request_limit = hubbub32_set_request_limit, .program_det_segments = dcn401_program_det_segments, .program_compbuf_segments = dcn401_program_compbuf_segments, + .wait_for_det_update = dcn401_wait_for_det_update, };
void hubbub401_construct(struct dcn20_hubbub *hubbub2, 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 7c724cf682840..edd302ebbdfcf 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 @@ -1677,3 +1677,94 @@ void dcn401_hardware_release(struct dc *dc) } }
+void dcn401_wait_for_det_buffer_update(struct dc *dc, struct dc_state *context, struct pipe_ctx *otg_master) +{ + struct pipe_ctx *opp_heads[MAX_PIPES]; + struct pipe_ctx *dpp_pipes[MAX_PIPES]; + struct hubbub *hubbub = dc->res_pool->hubbub; + int dpp_count = 0; + + if (!otg_master->stream) + return; + + int slice_count = resource_get_opp_heads_for_otg_master(otg_master, + &context->res_ctx, opp_heads); + + for (int slice_idx = 0; slice_idx < slice_count; slice_idx++) { + if (opp_heads[slice_idx]->plane_state) { + dpp_count = resource_get_dpp_pipes_for_opp_head( + opp_heads[slice_idx], + &context->res_ctx, + dpp_pipes); + for (int dpp_idx = 0; dpp_idx < dpp_count; dpp_idx++) { + struct pipe_ctx *dpp_pipe = dpp_pipes[dpp_idx]; + if (dpp_pipe && hubbub && + dpp_pipe->plane_res.hubp && + hubbub->funcs->wait_for_det_update) + hubbub->funcs->wait_for_det_update(hubbub, dpp_pipe->plane_res.hubp->inst); + } + } + } +} + +void dcn401_interdependent_update_lock(struct dc *dc, + struct dc_state *context, bool lock) +{ + unsigned int i = 0; + struct pipe_ctx *pipe = NULL; + struct timing_generator *tg = NULL; + bool pipe_unlocked[MAX_PIPES] = {0}; + + if (lock) { + for (i = 0; i < dc->res_pool->pipe_count; i++) { + pipe = &context->res_ctx.pipe_ctx[i]; + tg = pipe->stream_res.tg; + + if (!resource_is_pipe_type(pipe, OTG_MASTER) || + !tg->funcs->is_tg_enabled(tg) || + dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_PHANTOM) + continue; + dc->hwss.pipe_control_lock(dc, pipe, true); + } + } else { + /* Unlock pipes based on the change in DET allocation instead of pipe index + * Prevents over allocation of DET during unlock process + * e.g. 2 pipe config with different streams with a max of 20 DET segments + * Before: After: + * - Pipe0: 10 DET segments - Pipe0: 12 DET segments + * - Pipe1: 10 DET segments - Pipe1: 8 DET segments + * If Pipe0 gets updated first, 22 DET segments will be allocated + */ + for (i = 0; i < dc->res_pool->pipe_count; i++) { + pipe = &context->res_ctx.pipe_ctx[i]; + tg = pipe->stream_res.tg; + int current_pipe_idx = i; + + if (!resource_is_pipe_type(pipe, OTG_MASTER) || + !tg->funcs->is_tg_enabled(tg) || + dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_PHANTOM) { + pipe_unlocked[i] = true; + continue; + } + + // If the same stream exists in old context, ensure the OTG_MASTER pipes for the same stream get compared + struct pipe_ctx *old_otg_master = resource_get_otg_master_for_stream(&dc->current_state->res_ctx, pipe->stream); + + if (old_otg_master) + current_pipe_idx = old_otg_master->pipe_idx; + if (resource_calculate_det_for_stream(context, pipe) < + resource_calculate_det_for_stream(dc->current_state, &dc->current_state->res_ctx.pipe_ctx[current_pipe_idx])) { + dc->hwss.pipe_control_lock(dc, pipe, false); + pipe_unlocked[i] = true; + dcn401_wait_for_det_buffer_update(dc, context, pipe); + } + } + + for (i = 0; i < dc->res_pool->pipe_count; i++) { + if (pipe_unlocked[i]) + continue; + pipe = &context->res_ctx.pipe_ctx[i]; + dc->hwss.pipe_control_lock(dc, pipe, false); + } + } +} 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 8e9c1c17aa662..3ecb1ebffcee8 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 @@ -81,4 +81,6 @@ void dcn401_hardware_release(struct dc *dc); void dcn401_update_odm(struct dc *dc, struct dc_state *context, struct pipe_ctx *otg_master); void adjust_hotspot_between_slices_for_2x_magnify(uint32_t cursor_width, struct dc_cursor_position *pos_cpy); +void dcn401_wait_for_det_buffer_update(struct dc *dc, struct dc_state *context, struct pipe_ctx *otg_master); +void dcn401_interdependent_update_lock(struct dc *dc, struct dc_state *context, bool lock); #endif /* __DC_HWSS_DCN401_H__ */ diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c index 6a768702c7bde..28f3eb8f4b2d8 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_init.c @@ -38,7 +38,7 @@ static const struct hw_sequencer_funcs dcn401_funcs = { .disable_audio_stream = dce110_disable_audio_stream, .disable_plane = dcn20_disable_plane, .pipe_control_lock = dcn20_pipe_control_lock, - .interdependent_update_lock = dcn32_interdependent_update_lock, + .interdependent_update_lock = dcn401_interdependent_update_lock, .cursor_lock = dcn10_cursor_lock, .prepare_bandwidth = dcn401_prepare_bandwidth, .optimize_bandwidth = dcn401_optimize_bandwidth, diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h index dd2b2864876c7..67c32401893e8 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h @@ -227,6 +227,7 @@ struct hubbub_funcs { void (*get_mall_en)(struct hubbub *hubbub, unsigned int *mall_in_use); void (*program_det_segments)(struct hubbub *hubbub, int hubp_inst, unsigned det_buffer_size_seg); void (*program_compbuf_segments)(struct hubbub *hubbub, unsigned compbuf_size_seg, bool safe_to_increase); + void (*wait_for_det_update)(struct hubbub *hubbub, int hubp_inst); };
struct hubbub { diff --git a/drivers/gpu/drm/amd/display/dc/inc/resource.h b/drivers/gpu/drm/amd/display/dc/inc/resource.h index 96d40d33a1f99..9cd80d3864c7b 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/resource.h +++ b/drivers/gpu/drm/amd/display/dc/inc/resource.h @@ -639,4 +639,9 @@ struct dscl_prog_data *resource_get_dscl_prog_data(struct pipe_ctx *pipe_ctx); * @dml2_options: struct to hold callbacks */ void resource_init_common_dml2_callbacks(struct dc *dc, struct dml2_configuration_options *dml2_options); + +/* + *Calculate total DET allocated for all pipes for a given OTG_MASTER pipe + */ +int resource_calculate_det_for_stream(struct dc_state *state, struct pipe_ctx *otg_master); #endif /* DRIVERS_GPU_DRM_AMD_DC_DEV_DC_INC_RESOURCE_H_ */