From: Tony Cheng <tony.cheng@amd.com>
Date: Fri, 14 Jul 2017 14:07:16 -0400
Subject: drm/amd/display: mpo debug sanity checks
Git-commit: 2b13d7d380d50811fd4fc022d135c3c5bb70a418
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Signed-off-by: Tony Cheng <tony.cheng@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/dc.h | 1
drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h | 6
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 152 +++++++++++++-
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c | 21 +
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c | 1
5 files changed, 179 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -160,6 +160,7 @@ struct dc_config {
struct dc_debug {
bool surface_visual_confirm;
+ bool sanity_checks;
bool max_disp_clk;
bool surface_trace;
bool timing_trace;
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h
@@ -147,6 +147,9 @@
SRII(OPP_PIPE_CONTROL, OPP_PIPE, 3), \
SR(REFCLK_CNTL), \
SR(DCHUBBUB_GLOBAL_TIMER_CNTL), \
+ SR(DCHUBBUB_ARB_DRAM_STATE_CNTL), \
+ SR(DCHUBBUB_TEST_DEBUG_INDEX), \
+ SR(DCHUBBUB_TEST_DEBUG_DATA), \
SR(DC_IP_REQUEST_CNTL), \
SR(DOMAIN0_PG_CONFIG), \
SR(DOMAIN1_PG_CONFIG), \
@@ -195,6 +198,9 @@ struct dce_hwseq_registers {
uint32_t OPP_PIPE_CONTROL[4];
uint32_t REFCLK_CNTL;
uint32_t DCHUBBUB_GLOBAL_TIMER_CNTL;
+ uint32_t DCHUBBUB_ARB_DRAM_STATE_CNTL;
+ uint32_t DCHUBBUB_TEST_DEBUG_INDEX;
+ uint32_t DCHUBBUB_TEST_DEBUG_DATA;
uint32_t DC_IP_REQUEST_CNTL;
uint32_t DOMAIN0_PG_CONFIG;
uint32_t DOMAIN1_PG_CONFIG;
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -52,6 +52,75 @@
#define FN(reg_name, field_name) \
hws->shifts->field_name, hws->masks->field_name
+
+static void verify_allow_pstate_change_high(
+ struct dce_hwseq *hws)
+{
+ /* pstate latency is ~20us so if we wait over 40us and pstate allow
+ * still not asserted, we are probably stuck and going to hang
+ */
+ static unsigned int pstate_wait_timeout_us = 40;
+ static unsigned int max_sampled_pstate_wait_us; /* data collection */
+ static bool forced_pstate_allow; /* help with revert wa */
+
+ unsigned int debug_index = 0x7;
+ unsigned int debug_data;
+ unsigned int force_allow_pstate = 0x30;
+ unsigned int i;
+
+ if (forced_pstate_allow) {
+ /* we hacked to force pstate allow to prevent hang last time
+ * we verify_allow_pstate_change_high. so disable force
+ * here so we can check status
+ */
+ REG_WRITE(DCHUBBUB_ARB_DRAM_STATE_CNTL, 0);
+ forced_pstate_allow = false;
+ }
+
+ /* description "3-0: Pipe0 cursor0 QOS
+ * 7-4: Pipe1 cursor0 QOS
+ * 11-8: Pipe2 cursor0 QOS
+ * 15-12: Pipe3 cursor0 QOS
+ * 16: Pipe0 Plane0 Allow Pstate Change
+ * 17: Pipe1 Plane0 Allow Pstate Change
+ * 18: Pipe2 Plane0 Allow Pstate Change
+ * 19: Pipe3 Plane0 Allow Pstate Change
+ * 20: Pipe0 Plane1 Allow Pstate Change
+ * 21: Pipe1 Plane1 Allow Pstate Change
+ * 22: Pipe2 Plane1 Allow Pstate Change
+ * 23: Pipe3 Plane1 Allow Pstate Change
+ * 24: Pipe0 cursor0 Allow Pstate Change
+ * 25: Pipe1 cursor0 Allow Pstate Change
+ * 26: Pipe2 cursor0 Allow Pstate Change
+ * 27: Pipe3 cursor0 Allow Pstate Change
+ * 28: WB0 Allow Pstate Change
+ * 29: WB1 Allow Pstate Change
+ * 30: Arbiter's allow_pstate_change
+ * 31: SOC pstate change request
+ */
+
+ REG_WRITE(DCHUBBUB_TEST_DEBUG_INDEX, debug_index);
+
+ for (i = 0; i < pstate_wait_timeout_us; i++) {
+ debug_data = REG_READ(DCHUBBUB_TEST_DEBUG_DATA);
+
+ if (debug_data & (1 << 30))
+ return;
+
+ if (max_sampled_pstate_wait_us < i)
+ max_sampled_pstate_wait_us = i;
+
+ udelay(1);
+ }
+
+ /* force pstate allow to prevent system hang
+ * and break to debugger to investigate
+ */
+ REG_WRITE(DCHUBBUB_ARB_DRAM_STATE_CNTL, force_allow_pstate);
+ forced_pstate_allow = true;
+ BREAK_TO_DEBUGGER();
+}
+
static void enable_dppclk(
struct dce_hwseq *hws,
uint8_t plane_id,
@@ -477,12 +546,19 @@ static void reset_front_end(
REG_UPDATE(OTG_GLOBAL_SYNC_STATUS[tg->inst], VUPDATE_NO_LOCK_EVENT_CLEAR, 1);
tg->funcs->unlock(tg);
+
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
+
REG_WAIT(OTG_GLOBAL_SYNC_STATUS[tg->inst], VUPDATE_NO_LOCK_EVENT_OCCURRED, 1, 20000, 200000);
mpcc->funcs->wait_for_idle(mpcc);
mi->funcs->set_blank(mi, true);
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
+
REG_UPDATE(HUBP_CLK_CNTL[fe_idx],
HUBP_CLOCK_ENABLE, 0);
REG_UPDATE(DPP_CONTROL[fe_idx],
@@ -495,6 +571,9 @@ static void reset_front_end(
dm_logger_write(dc->ctx->logger, LOG_DC,
"Reset front end %d\n",
fe_idx);
+
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
}
static void dcn10_power_down_fe(struct core_dc *dc, int fe_idx)
@@ -511,6 +590,9 @@ static void dcn10_power_down_fe(struct c
IP_REQUEST_EN, 0);
dm_logger_write(dc->ctx->logger, LOG_DC,
"Power gated front end %d\n", fe_idx);
+
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
}
static void reset_hw_ctx_wrap(
@@ -995,10 +1077,16 @@ static void dcn10_pipe_control_lock(
if (pipe->top_pipe)
return;
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
+
if (lock)
pipe->tg->funcs->lock(pipe->tg);
else
pipe->tg->funcs->unlock(pipe->tg);
+
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
}
static bool wait_for_reset_trigger_to_occur(
@@ -1516,6 +1604,12 @@ static void program_all_pipe_in_tree(
/* watermark is for all pipes */
pipe_ctx->mi->funcs->program_watermarks(
pipe_ctx->mi, &context->bw.dcn.watermarks, ref_clk_mhz);
+
+ if (dc->public.debug.sanity_checks) {
+ /* pstate stuck check after watermark update */
+ verify_allow_pstate_change_high(dc->hwseq);
+ }
+
pipe_ctx->tg->funcs->lock(pipe_ctx->tg);
pipe_ctx->tg->dlg_otg_param.vready_offset = pipe_ctx->pipe_dlg_param.vready_offset;
@@ -1534,6 +1628,11 @@ static void program_all_pipe_in_tree(
update_dchubp_dpp(dc, pipe_ctx, context);
}
+ if (dc->public.debug.sanity_checks) {
+ /* pstate stuck check after each pipe is programmed */
+ verify_allow_pstate_change_high(dc->hwseq);
+ }
+
if (pipe_ctx->bottom_pipe != NULL)
program_all_pipe_in_tree(dc, pipe_ctx->bottom_pipe, context);
}
@@ -1572,6 +1671,9 @@ static void dcn10_apply_ctx_for_surface(
{
int i;
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
+
/* reset unused mpcc */
for (i = 0; i < dc->res_pool->pipe_count; i++) {
struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
@@ -1602,6 +1704,10 @@ static void dcn10_apply_ctx_for_surface(
mpcc_cfg.bot_mpcc_id = 0xf;
mpcc_cfg.top_of_tree = !old_pipe_ctx->top_pipe;
old_pipe_ctx->mpcc->funcs->set(old_pipe_ctx->mpcc, &mpcc_cfg);
+
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
+
/*
* the mpcc is the only thing that keeps track of the mpcc
* mapping for reset front end right now. Might need some
@@ -1679,6 +1785,9 @@ static void dcn10_apply_ctx_for_surface(
context->bw.dcn.watermarks.d.cstate_pstate.pstate_change_ns,
context->bw.dcn.watermarks.d.pte_meta_urgent_ns
);
+
+ if (dc->public.debug.sanity_checks)
+ verify_allow_pstate_change_high(dc->hwseq);
}
static void dcn10_set_bandwidth(
@@ -1738,6 +1847,8 @@ static void dcn10_set_bandwidth(
context->bw.dcn.calc_clk.min_active_dram_ccm_us;
}
dcn10_pplib_apply_display_requirements(dc, context);
+
+ /* need to fix this function. not doing the right thing here */
}
static void set_drr(struct pipe_ctx **pipe_ctx,
@@ -1866,7 +1977,44 @@ static bool dcn10_dummy_display_power_ga
struct core_dc *dc,
uint8_t controller_id,
struct dc_bios *dcb,
- enum pipe_gating_control power_gating) {return true; }
+ enum pipe_gating_control power_gating)
+{
+ return true;
+}
+
+void dcn10_update_pending_status(struct pipe_ctx *pipe_ctx)
+{
+ struct core_surface *surface = pipe_ctx->surface;
+ struct timing_generator *tg = pipe_ctx->tg;
+
+ if (surface->ctx->dc->debug.sanity_checks) {
+ struct core_dc *dc = DC_TO_CORE(surface->ctx->dc);
+
+ verify_allow_pstate_change_high(dc->hwseq);
+ }
+
+ if (surface == NULL)
+ return;
+
+ surface->status.is_flip_pending =
+ pipe_ctx->mi->funcs->mem_input_is_flip_pending(
+ pipe_ctx->mi);
+
+ /* DCN we read INUSE address in MI, do we still need this wa? */
+ if (surface->status.is_flip_pending &&
+ !surface->public.visible) {
+ pipe_ctx->mi->current_address =
+ pipe_ctx->mi->request_address;
+ BREAK_TO_DEBUGGER();
+ }
+
+ surface->status.current_address = pipe_ctx->mi->current_address;
+ if (pipe_ctx->mi->current_address.type == PLN_ADDR_TYPE_GRPH_STEREO &&
+ tg->funcs->is_stereo_left_eye) {
+ surface->status.is_right_eye =
+ !tg->funcs->is_stereo_left_eye(pipe_ctx->tg);
+ }
+}
static const struct hw_sequencer_funcs dcn10_funcs = {
.program_gamut_remap = program_gamut_remap,
@@ -1876,7 +2024,7 @@ static const struct hw_sequencer_funcs d
.apply_ctx_for_surface = dcn10_apply_ctx_for_surface,
.set_plane_config = set_plane_config,
.update_plane_addr = update_plane_addr,
- .update_pending_status = dce110_update_pending_status,
+ .update_pending_status = dcn10_update_pending_status,
.set_input_transfer_func = dcn10_set_input_transfer_func,
.set_output_transfer_func = dcn10_set_output_transfer_func,
.power_down = dce110_power_down,
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
@@ -77,6 +77,24 @@ static void reset_output_mux(struct dcn1
mpcc10->base.opp_id = 0xf;
}
+static void assert_mpcc_idle_before_connect(struct dcn10_mpcc *mpcc10)
+{
+ unsigned int top_sel;
+ unsigned int mpcc_busy, mpcc_idle, mpcc_status;
+
+ REG_GET(MPCC_TOP_SEL,
+ MPCC_TOP_SEL, &top_sel);
+
+ if (top_sel == 0xf) {
+ mpcc_status = REG_GET_2(MPCC_STATUS,
+ MPCC_BUSY, &mpcc_busy,
+ MPCC_IDLE, &mpcc_idle);
+
+ ASSERT(mpcc_busy == 0);
+ ASSERT(mpcc_idle == 1);
+ }
+}
+
static void dcn10_mpcc_set(struct mpcc *mpcc, struct mpcc_cfg *cfg)
{
struct dcn10_mpcc *mpcc10 = TO_DCN10_MPCC(mpcc);
@@ -87,6 +105,9 @@ static void dcn10_mpcc_set(struct mpcc *
bool blend_active_only = cfg->top_of_tree &&
!mpcc->ctx->dc->debug.surface_visual_confirm;
+ if (mpcc->ctx->dc->debug.sanity_checks)
+ assert_mpcc_idle_before_connect(mpcc10);
+
REG_SET(MPCC_OPP_ID, 0,
MPCC_OPP_ID, cfg->opp_id);
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
@@ -424,6 +424,7 @@ static const struct resource_caps res_ca
static const struct dc_debug debug_defaults_drv = {
.disable_dcc = false,
+ .sanity_checks = true,
.disable_dmcu = true,
.force_abm_enable = false,
.timing_trace = false,