[PATCH 5.6 125/177] drm/amd/display: Split program front end part that occur outside lock

From: Greg Kroah-Hartman
Date: Mon Jun 01 2020 - 14:16:14 EST

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From: Anthony Koo <Anthony.Koo@xxxxxxx>

[ Upstream commit bbf5f6c3f83bedd71006473849138a446ad4d9a3 ]

[Why]
Eventually want to lock at a higher level in stack.
To do this, we need to be able to isolate the parts that need to be done
after pipe unlock.

[How]
Split out programming that is done post unlock.

Signed-off-by: Anthony Koo <Anthony.Koo@xxxxxxx>
Reviewed-by: Aric Cyr <Aric.Cyr@xxxxxxx>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 24 +++++++++---
.../display/dc/dce110/dce110_hw_sequencer.c | 6 +++
.../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 39 ++++++++++++++++---
.../amd/display/dc/dcn10/dcn10_hw_sequencer.h | 3 ++
.../gpu/drm/amd/display/dc/dcn10/dcn10_init.c | 1 +
.../drm/amd/display/dc/dcn20/dcn20_hwseq.c | 11 +++++-
.../drm/amd/display/dc/dcn20/dcn20_hwseq.h | 3 ++
.../gpu/drm/amd/display/dc/dcn20/dcn20_init.c | 1 +
.../gpu/drm/amd/display/dc/dcn21/dcn21_init.c | 1 +
.../gpu/drm/amd/display/dc/inc/hw_sequencer.h | 2 +
10 files changed, 79 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index b3987124183a..66be2920fab0 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -788,11 +788,15 @@ static void disable_dangling_plane(struct dc *dc, struct dc_state *context)
if (should_disable && old_stream) {
dc_rem_all_planes_for_stream(dc, old_stream, dangling_context);
disable_all_writeback_pipes_for_stream(dc, old_stream, dangling_context);
- if (dc->hwss.apply_ctx_for_surface)
+ if (dc->hwss.apply_ctx_for_surface) {
dc->hwss.apply_ctx_for_surface(dc, old_stream, 0, dangling_context);
+ dc->hwss.post_unlock_program_front_end(dc, dangling_context);
+ }
+ if (dc->hwss.program_front_end_for_ctx) {
+ dc->hwss.program_front_end_for_ctx(dc, dangling_context);
+ dc->hwss.post_unlock_program_front_end(dc, dangling_context);
+ }
}
- if (dc->hwss.program_front_end_for_ctx)
- dc->hwss.program_front_end_for_ctx(dc, dangling_context);
}

current_ctx = dc->current_state;
@@ -1220,6 +1224,7 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
dc, context->streams[i],
context->stream_status[i].plane_count,
context); /* use new pipe config in new context */
+ dc->hwss.post_unlock_program_front_end(dc, context);
}

/* Program hardware */
@@ -1239,19 +1244,24 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
}

/* Program all planes within new context*/
- if (dc->hwss.program_front_end_for_ctx)
+ if (dc->hwss.program_front_end_for_ctx) {
dc->hwss.program_front_end_for_ctx(dc, context);
+ dc->hwss.post_unlock_program_front_end(dc, context);
+ }
+
for (i = 0; i < context->stream_count; i++) {
const struct dc_link *link = context->streams[i]->link;

if (!context->streams[i]->mode_changed)
continue;

- if (dc->hwss.apply_ctx_for_surface)
+ if (dc->hwss.apply_ctx_for_surface) {
dc->hwss.apply_ctx_for_surface(
dc, context->streams[i],
context->stream_status[i].plane_count,
context);
+ dc->hwss.post_unlock_program_front_end(dc, context);
+ }

/*
* enable stereo
@@ -2190,6 +2200,7 @@ static void commit_planes_for_stream(struct dc *dc,
if (dc->hwss.program_front_end_for_ctx)
dc->hwss.program_front_end_for_ctx(dc, context);

+ dc->hwss.post_unlock_program_front_end(dc, context);
return;
}

@@ -2322,6 +2333,9 @@ static void commit_planes_for_stream(struct dc *dc,
dc->hwss.pipe_control_lock(dc, top_pipe_to_program, false);
}

+ if (update_type != UPDATE_TYPE_FAST)
+ dc->hwss.post_unlock_program_front_end(dc, context);
+
// Fire manual trigger only when bottom plane is flipped
for (j = 0; j < dc->res_pool->pipe_count; j++) {
struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 5b689273ff44..a961b94aefd9 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -2621,6 +2621,11 @@ static void dce110_apply_ctx_for_surface(
enable_fbc(dc, context);
}

+static void dce110_post_unlock_program_front_end(
+ struct dc *dc,
+ struct dc_state *context)
+{
+}
static void dce110_power_down_fe(struct dc *dc, struct pipe_ctx *pipe_ctx)
{
struct dce_hwseq *hws = dc->hwseq;
@@ -2722,6 +2727,7 @@ static const struct hw_sequencer_funcs dce110_funcs = {
.init_hw = init_hw,
.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
.apply_ctx_for_surface = dce110_apply_ctx_for_surface,
+ .post_unlock_program_front_end = dce110_post_unlock_program_front_end,
.update_plane_addr = update_plane_addr,
.update_pending_status = dce110_update_pending_status,
.enable_accelerated_mode = dce110_enable_accelerated_mode,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 1008ac8a0f2a..a9a5a13d5edf 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2512,7 +2512,6 @@ void dcn10_apply_ctx_for_surface(
int i;
struct timing_generator *tg;
uint32_t underflow_check_delay_us;
- bool removed_pipe[4] = { false };
bool interdependent_update = false;
struct pipe_ctx *top_pipe_to_program =
dcn10_find_top_pipe_for_stream(dc, context, stream);
@@ -2552,6 +2551,9 @@ void dcn10_apply_ctx_for_surface(
struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
struct pipe_ctx *old_pipe_ctx =
&dc->current_state->res_ctx.pipe_ctx[i];
+
+ pipe_ctx->update_flags.raw = 0;
+
/*
* Powergate reused pipes that are not powergated
* fairly hacky right now, using opp_id as indicator
@@ -2571,7 +2573,7 @@ void dcn10_apply_ctx_for_surface(
old_pipe_ctx->stream_res.tg == tg) {

hws->funcs.plane_atomic_disconnect(dc, old_pipe_ctx);
- removed_pipe[i] = true;
+ pipe_ctx->update_flags.bits.disable = 1;

DC_LOG_DC("Reset mpcc for pipe %d\n",
old_pipe_ctx->pipe_idx);
@@ -2602,16 +2604,41 @@ void dcn10_apply_ctx_for_surface(
dcn10_lock_all_pipes(dc, context, false);
else
dcn10_pipe_control_lock(dc, top_pipe_to_program, false);
+}
+
+void dcn10_post_unlock_program_front_end(
+ struct dc *dc,
+ struct dc_state *context)
+{
+ int i, j;
+
+ DC_LOGGER_INIT(dc->ctx->logger);

- if (num_planes == 0)
- false_optc_underflow_wa(dc, stream, tg);
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
+
+ if (!pipe_ctx->top_pipe &&
+ !pipe_ctx->prev_odm_pipe &&
+ pipe_ctx->stream) {
+ struct dc_stream_status *stream_status = NULL;
+ struct timing_generator *tg = pipe_ctx->stream_res.tg;
+
+ for (j = 0; j < context->stream_count; j++) {
+ if (pipe_ctx->stream == context->streams[j])
+ stream_status = &context->stream_status[j];
+ }
+
+ if (context->stream_status[i].plane_count == 0)
+ false_optc_underflow_wa(dc, pipe_ctx->stream, tg);
+ }
+ }

for (i = 0; i < dc->res_pool->pipe_count; i++)
- if (removed_pipe[i])
+ if (context->res_ctx.pipe_ctx[i].update_flags.bits.disable)
dc->hwss.disable_plane(dc, &dc->current_state->res_ctx.pipe_ctx[i]);

for (i = 0; i < dc->res_pool->pipe_count; i++)
- if (removed_pipe[i]) {
+ if (context->res_ctx.pipe_ctx[i].update_flags.bits.disable) {
dc->hwss.optimize_bandwidth(dc, context);
break;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h
index 4d20f6586bb5..b523f0b8dc23 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h
@@ -75,6 +75,9 @@ void dcn10_apply_ctx_for_surface(
const struct dc_stream_state *stream,
int num_planes,
struct dc_state *context);
+void dcn10_post_unlock_program_front_end(
+ struct dc *dc,
+ struct dc_state *context);
void dcn10_hubp_pg_control(
struct dce_hwseq *hws,
unsigned int hubp_inst,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c
index e7e5352ec424..681db997a532 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c
@@ -32,6 +32,7 @@ static const struct hw_sequencer_funcs dcn10_funcs = {
.init_hw = dcn10_init_hw,
.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
.apply_ctx_for_surface = dcn10_apply_ctx_for_surface,
+ .post_unlock_program_front_end = dcn10_post_unlock_program_front_end,
.update_plane_addr = dcn10_update_plane_addr,
.update_dchub = dcn10_update_dchub,
.update_pending_status = dcn10_update_pending_status,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index ad422e00f9fe..0c4a8c37ce84 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1551,7 +1551,6 @@ void dcn20_program_front_end_for_ctx(
struct dc *dc,
struct dc_state *context)
{
- const unsigned int TIMEOUT_FOR_PIPE_ENABLE_MS = 100;
int i;
struct dce_hwseq *hws = dc->hwseq;
bool pipe_locked[MAX_PIPES] = {false};
@@ -1626,6 +1625,16 @@ void dcn20_program_front_end_for_ctx(
if (!pipe_ctx->update_flags.bits.enable)
dc->hwss.pipe_control_lock(dc, &dc->current_state->res_ctx.pipe_ctx[i], false);
}
+}
+
+void dcn20_post_unlock_program_front_end(
+ struct dc *dc,
+ struct dc_state *context)
+{
+ int i;
+ const unsigned int TIMEOUT_FOR_PIPE_ENABLE_MS = 100;
+
+ DC_LOGGER_INIT(dc->ctx->logger);

for (i = 0; i < dc->res_pool->pipe_count; i++)
if (context->res_ctx.pipe_ctx[i].update_flags.bits.disable)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.h
index 02c9be5ebd47..80f192b8b3a2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.h
@@ -35,6 +35,9 @@ bool dcn20_set_shaper_3dlut(
void dcn20_program_front_end_for_ctx(
struct dc *dc,
struct dc_state *context);
+void dcn20_post_unlock_program_front_end(
+ struct dc *dc,
+ struct dc_state *context);
void dcn20_update_plane_addr(const struct dc *dc, struct pipe_ctx *pipe_ctx);
void dcn20_update_mpcc(struct dc *dc, struct pipe_ctx *pipe_ctx);
bool dcn20_set_input_transfer_func(struct dc *dc, struct pipe_ctx *pipe_ctx,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c
index 5e640f17d3d4..c0a7cf1ba3a0 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c
@@ -33,6 +33,7 @@ static const struct hw_sequencer_funcs dcn20_funcs = {
.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
.apply_ctx_for_surface = NULL,
.program_front_end_for_ctx = dcn20_program_front_end_for_ctx,
+ .post_unlock_program_front_end = dcn20_post_unlock_program_front_end,
.update_plane_addr = dcn20_update_plane_addr,
.update_dchub = dcn10_update_dchub,
.update_pending_status = dcn10_update_pending_status,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c
index fddbd59bf4f9..bb8309513964 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c
@@ -34,6 +34,7 @@ static const struct hw_sequencer_funcs dcn21_funcs = {
.apply_ctx_to_hw = dce110_apply_ctx_to_hw,
.apply_ctx_for_surface = NULL,
.program_front_end_for_ctx = dcn20_program_front_end_for_ctx,
+ .post_unlock_program_front_end = dcn20_post_unlock_program_front_end,
.update_plane_addr = dcn20_update_plane_addr,
.update_dchub = dcn10_update_dchub,
.update_pending_status = dcn10_update_pending_status,
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
index 209118f9f193..63919866ba38 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
@@ -66,6 +66,8 @@ struct hw_sequencer_funcs {
int num_planes, struct dc_state *context);
void (*program_front_end_for_ctx)(struct dc *dc,
struct dc_state *context);
+ void (*post_unlock_program_front_end)(struct dc *dc,
+ struct dc_state *context);
void (*update_plane_addr)(const struct dc *dc,
struct pipe_ctx *pipe_ctx);
void (*update_dchub)(struct dce_hwseq *hws,
--
2.25.1

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