The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
Thanks, Sasha
------------------ original commit in Linus's tree ------------------
From 2d7f3d1a5866705be2393150e1ffdf67030ab88d Mon Sep 17 00:00:00 2001 From: Wenjing Liu wenjing.liu@amd.com Date: Fri, 23 Feb 2024 15:38:40 -0500 Subject: [PATCH] drm/amd/display: Implement wait_for_odm_update_pending_complete
[WHY] Odm update is doubled buffered. We need to wait for ODM update to be completed before optimizing bandwidth or programming new udpates.
[HOW] implement wait_for_odm_update_pending_complete function to wait for: 1. odm configuration update is no longer pending in timing generator. 2. no pending dpg pattern update for each active OPP.
Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Reviewed-by: Alvin Lee alvin.lee2@amd.com Acked-by: Alex Hung alex.hung@amd.com Signed-off-by: Wenjing Liu wenjing.liu@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/amd/display/dc/core/dc.c | 56 ++++++++++++++++++- .../gpu/drm/amd/display/dc/dcn10/dcn10_opp.c | 1 + .../gpu/drm/amd/display/dc/dcn20/dcn20_opp.c | 14 +++++ .../gpu/drm/amd/display/dc/dcn20/dcn20_opp.h | 2 + .../drm/amd/display/dc/dcn201/dcn201_opp.c | 1 + .../amd/display/dc/hwss/dcn20/dcn20_hwseq.c | 4 +- drivers/gpu/drm/amd/display/dc/inc/hw/opp.h | 3 + .../amd/display/dc/inc/hw/timing_generator.h | 1 + .../amd/display/dc/optc/dcn10/dcn10_optc.h | 3 +- .../amd/display/dc/optc/dcn32/dcn32_optc.c | 8 +++ .../amd/display/dc/optc/dcn32/dcn32_optc.h | 1 + 11 files changed, 90 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 958552a8605ff..e7dc128f6284b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1302,6 +1302,54 @@ static void disable_vbios_mode_if_required( } }
+/** + * wait_for_blank_complete - wait for all active OPPs to finish pending blank + * pattern updates + * + * @dc: [in] dc reference + * @context: [in] hardware context in use + */ +static void wait_for_blank_complete(struct dc *dc, + struct dc_state *context) +{ + struct pipe_ctx *opp_head; + struct dce_hwseq *hws = dc->hwseq; + int i; + + if (!hws->funcs.wait_for_blank_complete) + return; + + for (i = 0; i < MAX_PIPES; i++) { + opp_head = &context->res_ctx.pipe_ctx[i]; + + if (!resource_is_pipe_type(opp_head, OPP_HEAD) || + dc_state_get_pipe_subvp_type(context, opp_head) == SUBVP_PHANTOM) + continue; + + hws->funcs.wait_for_blank_complete(opp_head->stream_res.opp); + } +} + +static void wait_for_odm_update_pending_complete(struct dc *dc, struct dc_state *context) +{ + struct pipe_ctx *otg_master; + struct timing_generator *tg; + int i; + + for (i = 0; i < MAX_PIPES; i++) { + otg_master = &context->res_ctx.pipe_ctx[i]; + if (!resource_is_pipe_type(otg_master, OTG_MASTER) || + dc_state_get_pipe_subvp_type(context, otg_master) == SUBVP_PHANTOM) + continue; + tg = otg_master->stream_res.tg; + if (tg->funcs->wait_odm_doublebuffer_pending_clear) + tg->funcs->wait_odm_doublebuffer_pending_clear(tg); + } + + /* ODM update may require to reprogram blank pattern for each OPP */ + wait_for_blank_complete(dc, context); +} + static void wait_for_no_pipes_pending(struct dc *dc, struct dc_state *context) { int i; @@ -1993,6 +2041,11 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c context->stream_count == 0) { /* Must wait for no flips to be pending before doing optimize bw */ wait_for_no_pipes_pending(dc, context); + /* + * optimized dispclk depends on ODM setup. Need to wait for ODM + * update pending complete before optimizing bandwidth. + */ + wait_for_odm_update_pending_complete(dc, context); /* pplib is notified if disp_num changed */ dc->hwss.optimize_bandwidth(dc, context); /* Need to do otg sync again as otg could be out of sync due to otg @@ -3496,7 +3549,7 @@ static void commit_planes_for_stream_fast(struct dc *dc, top_pipe_to_program->stream->update_flags.raw = 0; }
-static void wait_for_outstanding_hw_updates(struct dc *dc, const struct dc_state *dc_context) +static void wait_for_outstanding_hw_updates(struct dc *dc, struct dc_state *dc_context) { /* * This function calls HWSS to wait for any potentially double buffered @@ -3534,6 +3587,7 @@ static void wait_for_outstanding_hw_updates(struct dc *dc, const struct dc_state } } } + wait_for_odm_update_pending_complete(dc, dc_context); }
static void commit_planes_for_stream(struct dc *dc, diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c index 48a40dcc7050b..5838a11efd00c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c @@ -384,6 +384,7 @@ static const struct opp_funcs dcn10_opp_funcs = { .opp_set_disp_pattern_generator = NULL, .opp_program_dpg_dimensions = NULL, .dpg_is_blanked = NULL, + .dpg_is_pending = NULL, .opp_destroy = opp1_destroy };
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.c index 0784d01986610..fbf1b6370eb23 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.c @@ -337,6 +337,19 @@ bool opp2_dpg_is_blanked(struct output_pixel_processor *opp) (double_buffer_pending == 0); }
+bool opp2_dpg_is_pending(struct output_pixel_processor *opp) +{ + struct dcn20_opp *oppn20 = TO_DCN20_OPP(opp); + uint32_t double_buffer_pending; + uint32_t dpg_en; + + REG_GET(DPG_CONTROL, DPG_EN, &dpg_en); + + REG_GET(DPG_STATUS, DPG_DOUBLE_BUFFER_PENDING, &double_buffer_pending); + + return (dpg_en == 1 && double_buffer_pending == 1); +} + void opp2_program_left_edge_extra_pixel ( struct output_pixel_processor *opp, bool count) @@ -363,6 +376,7 @@ static struct opp_funcs dcn20_opp_funcs = { .opp_set_disp_pattern_generator = opp2_set_disp_pattern_generator, .opp_program_dpg_dimensions = opp2_program_dpg_dimensions, .dpg_is_blanked = opp2_dpg_is_blanked, + .dpg_is_pending = opp2_dpg_is_pending, .opp_dpg_set_blank_color = opp2_dpg_set_blank_color, .opp_destroy = opp1_destroy, .opp_program_left_edge_extra_pixel = opp2_program_left_edge_extra_pixel, diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.h index 3ab221bdd27dd..8f186abd558db 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.h +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_opp.h @@ -159,6 +159,8 @@ void opp2_program_dpg_dimensions(
bool opp2_dpg_is_blanked(struct output_pixel_processor *opp);
+bool opp2_dpg_is_pending(struct output_pixel_processor *opp); + void opp2_dpg_set_blank_color( struct output_pixel_processor *opp, const struct tg_color *color); diff --git a/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_opp.c b/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_opp.c index 8e77db46a4090..6a71ba3dfc632 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_opp.c +++ b/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_opp.c @@ -50,6 +50,7 @@ static struct opp_funcs dcn201_opp_funcs = { .opp_set_disp_pattern_generator = opp2_set_disp_pattern_generator, .opp_program_dpg_dimensions = opp2_program_dpg_dimensions, .dpg_is_blanked = opp2_dpg_is_blanked, + .dpg_is_pending = opp2_dpg_is_pending, .opp_dpg_set_blank_color = opp2_dpg_set_blank_color, .opp_destroy = opp1_destroy, .opp_program_left_edge_extra_pixel = opp2_program_left_edge_extra_pixel, 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 40098d9f70cbc..8b3536c380b8d 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c @@ -2452,7 +2452,7 @@ bool dcn20_wait_for_blank_complete( int counter;
for (counter = 0; counter < 1000; counter++) { - if (opp->funcs->dpg_is_blanked(opp)) + if (!opp->funcs->dpg_is_pending(opp)) break;
udelay(100); @@ -2463,7 +2463,7 @@ bool dcn20_wait_for_blank_complete( return false; }
- return true; + return opp->funcs->dpg_is_blanked(opp); }
bool dcn20_dmdata_status_done(struct pipe_ctx *pipe_ctx) diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h b/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h index aee5372e292c5..d89c92370d5b3 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h @@ -337,6 +337,9 @@ struct opp_funcs { bool (*dpg_is_blanked)( struct output_pixel_processor *opp);
+ bool (*dpg_is_pending)(struct output_pixel_processor *opp); + + void (*opp_dpg_set_blank_color)( struct output_pixel_processor *opp, const struct tg_color *color); diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h b/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h index d98d72f35be5b..ffad8fe16c54d 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h @@ -331,6 +331,7 @@ struct timing_generator_funcs {
void (*init_odm)(struct timing_generator *tg); void (*wait_drr_doublebuffer_pending_clear)(struct timing_generator *tg); + void (*wait_odm_doublebuffer_pending_clear)(struct timing_generator *tg); };
#endif diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h b/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h index ab81594a7fadc..6c2e84d3967fc 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.h @@ -557,7 +557,8 @@ struct dcn_optc_registers { type OTG_CRC_DATA_STREAM_SPLIT_MODE;\ type OTG_CRC_DATA_FORMAT;\ type OTG_V_TOTAL_LAST_USED_BY_DRR;\ - type OTG_DRR_TIMING_DBUF_UPDATE_PENDING; + type OTG_DRR_TIMING_DBUF_UPDATE_PENDING;\ + type OTG_H_TIMING_DIV_MODE_DB_UPDATE_PENDING;
#define TG_REG_FIELD_LIST_DCN3_2(type) \ type OTG_H_TIMING_DIV_MODE_MANUAL; diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c index 8234935433254..f07a4c7e48bc2 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c @@ -122,6 +122,13 @@ void optc32_get_odm_combine_segments(struct timing_generator *tg, int *odm_combi } }
+void optc32_wait_odm_doublebuffer_pending_clear(struct timing_generator *tg) +{ + struct optc *optc1 = DCN10TG_FROM_TG(tg); + + REG_WAIT(OTG_DOUBLE_BUFFER_CONTROL, OTG_H_TIMING_DIV_MODE_DB_UPDATE_PENDING, 0, 2, 50000); +} + void optc32_set_h_timing_div_manual_mode(struct timing_generator *optc, bool manual_mode) { struct optc *optc1 = DCN10TG_FROM_TG(optc); @@ -345,6 +352,7 @@ static struct timing_generator_funcs dcn32_tg_funcs = { .set_odm_bypass = optc32_set_odm_bypass, .set_odm_combine = optc32_set_odm_combine, .get_odm_combine_segments = optc32_get_odm_combine_segments, + .wait_odm_doublebuffer_pending_clear = optc32_wait_odm_doublebuffer_pending_clear, .set_h_timing_div_manual_mode = optc32_set_h_timing_div_manual_mode, .get_optc_source = optc2_get_optc_source, .set_out_mux = optc3_set_out_mux, diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h index 8ce3b178cab06..0c2c146955619 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h @@ -183,5 +183,6 @@ void optc32_set_h_timing_div_manual_mode(struct timing_generator *optc, bool man void optc32_get_odm_combine_segments(struct timing_generator *tg, int *odm_combine_segments); void optc32_set_odm_bypass(struct timing_generator *optc, const struct dc_crtc_timing *dc_crtc_timing); +void optc32_wait_odm_doublebuffer_pending_clear(struct timing_generator *tg);
#endif /* __DC_OPTC_DCN32_H__ */