This is a note to let you know that I've just added the patch titled
drm/amd/display: Implement wait_for_odm_update_pending_complete
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-implement-wait_for_odm_update_pendin.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8b429b10c275d291b583dc663d633acad232f71c
Author: Wenjing Liu <wenjing.liu@xxxxxxx>
Date: Fri Feb 23 15:38:40 2024 -0500
drm/amd/display: Implement wait_for_odm_update_pending_complete
[ Upstream commit 2d7f3d1a5866705be2393150e1ffdf67030ab88d ]
[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@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Alvin Lee <alvin.lee2@xxxxxxx>
Acked-by: Alex Hung <alex.hung@xxxxxxx>
Signed-off-by: Wenjing Liu <wenjing.liu@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index fdff99a1dff7a..02e85b832a7d3 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1282,6 +1282,54 @@ 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;
@@ -1969,6 +2017,11 @@ 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
@@ -3447,7 +3500,7 @@ 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
@@ -3485,6 +3538,7 @@ 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 0dec57679269b..86bfed5dea2e2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c
@@ -377,6 +377,7 @@ 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 eb0480aee859d..c29c7eb017c37 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
@@ -2345,7 +2345,7 @@ 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);
@@ -2356,7 +2356,7 @@ 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 7617fabbd16ee..0717920812d86 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h
@@ -321,6 +321,9 @@ 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 9a00a99317b29..cad3e5f148cf5 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
@@ -333,6 +333,7 @@ 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__ */
