[PATCH 07/25] drm/amd/display: underflow/blankscreen recovery
Harry Wentland
harry.wentland at amd.com
Tue May 8 17:10:23 UTC 2018
From: Charlene Liu <charlene.liu at amd.com>
[Description]
for any reason, if driver detects HUBP underflow,
if a debug option enabled to enable recovery.
it will kick in a sequence of recovery.
Signed-off-by: Charlene Liu <charlene.liu at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <harry.wentland at amd.com>
---
drivers/gpu/drm/amd/display/dc/dc.h | 2 +
.../drm/amd/display/dc/dcn10/dcn10_hubbub.c | 8 ++
.../drm/amd/display/dc/dcn10/dcn10_hubbub.h | 7 +-
.../gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c | 24 +++++
.../gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h | 3 +
.../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 90 ++++++++++++++++++-
.../drm/amd/display/dc/dcn10/dcn10_resource.c | 1 +
drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h | 2 +
8 files changed, 135 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index cd4f4341cb53..1c39c9996a04 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -239,6 +239,8 @@ struct dc_debug {
bool az_endpoint_mute_only;
bool always_use_regamma;
bool p010_mpo_support;
+ bool recovery_enabled;
+
};
struct dc_state;
struct resource_pool;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
index b9fb14a3224b..943143efbb82 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
@@ -476,6 +476,14 @@ void hubbub1_toggle_watermark_change_req(struct hubbub *hubbub)
DCHUBBUB_ARB_WATERMARK_CHANGE_REQUEST, watermark_change_req);
}
+void hubbub1_soft_reset(struct hubbub *hubbub, bool reset)
+{
+ uint32_t reset_en = reset ? 1 : 0;
+
+ REG_UPDATE(DCHUBBUB_SOFT_RESET,
+ DCHUBBUB_GLOBAL_SOFT_RESET, reset_en);
+}
+
static bool hubbub1_dcc_support_swizzle(
enum swizzle_mode_values swizzle,
unsigned int bytes_per_element,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h
index f479f54e5bb2..6315a0e6b0d6 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h
@@ -48,7 +48,8 @@
SR(DCHUBBUB_ARB_DF_REQ_OUTSTAND),\
SR(DCHUBBUB_GLOBAL_TIMER_CNTL), \
SR(DCHUBBUB_TEST_DEBUG_INDEX), \
- SR(DCHUBBUB_TEST_DEBUG_DATA)
+ SR(DCHUBBUB_TEST_DEBUG_DATA),\
+ SR(DCHUBBUB_SOFT_RESET)
#define HUBBUB_SR_WATERMARK_REG_LIST()\
SR(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A),\
@@ -105,6 +106,7 @@ struct dcn_hubbub_registers {
uint32_t DCHUBBUB_SDPIF_AGP_BOT;
uint32_t DCHUBBUB_SDPIF_AGP_TOP;
uint32_t DCHUBBUB_CRC_CTRL;
+ uint32_t DCHUBBUB_SOFT_RESET;
};
/* set field name */
@@ -114,6 +116,7 @@ struct dcn_hubbub_registers {
#define HUBBUB_MASK_SH_LIST_DCN(mask_sh)\
HUBBUB_SF(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_ENABLE, mask_sh), \
+ HUBBUB_SF(DCHUBBUB_SOFT_RESET, DCHUBBUB_GLOBAL_SOFT_RESET, mask_sh), \
HUBBUB_SF(DCHUBBUB_ARB_WATERMARK_CHANGE_CNTL, DCHUBBUB_ARB_WATERMARK_CHANGE_REQUEST, mask_sh), \
HUBBUB_SF(DCHUBBUB_ARB_WATERMARK_CHANGE_CNTL, DCHUBBUB_ARB_WATERMARK_CHANGE_DONE_INTERRUPT_DISABLE, mask_sh), \
HUBBUB_SF(DCHUBBUB_ARB_DRAM_STATE_CNTL, DCHUBBUB_ARB_ALLOW_SELF_REFRESH_FORCE_VALUE, mask_sh), \
@@ -143,6 +146,7 @@ struct dcn_hubbub_registers {
type DCHUBBUB_ARB_SAT_LEVEL;\
type DCHUBBUB_ARB_MIN_REQ_OUTSTAND;\
type DCHUBBUB_GLOBAL_TIMER_REFDIV;\
+ type DCHUBBUB_GLOBAL_SOFT_RESET; \
type SDPIF_FB_TOP;\
type SDPIF_FB_BASE;\
type SDPIF_FB_OFFSET;\
@@ -201,6 +205,7 @@ void hubbub1_toggle_watermark_change_req(
void hubbub1_wm_read_state(struct hubbub *hubbub,
struct dcn_hubbub_wm *wm);
+void hubbub1_soft_reset(struct hubbub *hubbub, bool reset);
void hubbub1_construct(struct hubbub *hubbub,
struct dc_context *ctx,
const struct dcn_hubbub_registers *hubbub_regs,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
index 185f93bda41b..d2ab78b35a7a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
@@ -78,6 +78,27 @@ static void hubp1_disconnect(struct hubp *hubp)
CURSOR_ENABLE, 0);
}
+static void hubp1_disable_control(struct hubp *hubp, bool disable_hubp)
+{
+ struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
+ uint32_t disable = disable_hubp ? 1 : 0;
+
+ REG_UPDATE(DCHUBP_CNTL,
+ HUBP_DISABLE, disable);
+}
+
+static unsigned int hubp1_get_underflow_status(struct hubp *hubp)
+{
+ uint32_t hubp_underflow = 0;
+ struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
+
+ REG_GET(DCHUBP_CNTL,
+ HUBP_UNDERFLOW_STATUS,
+ &hubp_underflow);
+
+ return hubp_underflow;
+}
+
static void hubp1_set_hubp_blank_en(struct hubp *hubp, bool blank)
{
struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
@@ -1117,6 +1138,9 @@ static struct hubp_funcs dcn10_hubp_funcs = {
.hubp_clk_cntl = hubp1_clk_cntl,
.hubp_vtg_sel = hubp1_vtg_sel,
.hubp_read_state = hubp1_read_state,
+ .hubp_disable_control = hubp1_disable_control,
+ .hubp_get_underflow_status = hubp1_get_underflow_status,
+
};
/*****************************************/
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h
index fe9b8c4a91ca..af384034398f 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h
@@ -253,6 +253,7 @@
HUBP_SF(HUBP0_DCHUBP_CNTL, HUBP_UNDERFLOW_STATUS, mask_sh),\
HUBP_SF(HUBP0_DCHUBP_CNTL, HUBP_NO_OUTSTANDING_REQ, mask_sh),\
HUBP_SF(HUBP0_DCHUBP_CNTL, HUBP_VTG_SEL, mask_sh),\
+ HUBP_SF(HUBP0_DCHUBP_CNTL, HUBP_DISABLE, mask_sh),\
HUBP_SF(HUBP0_DCSURF_ADDR_CONFIG, NUM_PIPES, mask_sh),\
HUBP_SF(HUBP0_DCSURF_ADDR_CONFIG, NUM_BANKS, mask_sh),\
HUBP_SF(HUBP0_DCSURF_ADDR_CONFIG, PIPE_INTERLEAVE, mask_sh),\
@@ -421,6 +422,7 @@
#define DCN_HUBP_REG_FIELD_LIST(type) \
type HUBP_BLANK_EN;\
+ type HUBP_DISABLE;\
type HUBP_TTU_DISABLE;\
type HUBP_NO_OUTSTANDING_REQ;\
type HUBP_VTG_SEL;\
@@ -723,4 +725,5 @@ void hubp1_read_state(struct hubp *hubp);
enum cursor_pitch hubp1_get_cursor_pitch(unsigned int pitch);
+
#endif
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 d3fc1a23d92c..ada55a920d93 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
@@ -762,6 +762,90 @@ static void reset_back_end_for_pipe(
pipe_ctx->pipe_idx, pipe_ctx->stream_res.tg->inst);
}
+static bool dcn10_hw_wa_force_recovery(struct dc *dc)
+{
+ struct hubp *hubp ;
+ unsigned int i;
+ bool need_recover = true;
+
+ if (!dc->debug.recovery_enabled)
+ return false;
+
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx =
+ &dc->current_state->res_ctx.pipe_ctx[i];
+ if (pipe_ctx != NULL) {
+ hubp = pipe_ctx->plane_res.hubp;
+ if (hubp != NULL) {
+ if (hubp->funcs->hubp_get_underflow_status(hubp) != 0) {
+ /* one pipe underflow, we will reset all the pipes*/
+ need_recover = true;
+ }
+ }
+ }
+ }
+ if (!need_recover)
+ return false;
+ /*
+ DCHUBP_CNTL:HUBP_BLANK_EN=1
+ DCHUBBUB_SOFT_RESET:DCHUBBUB_GLOBAL_SOFT_RESET=1
+ DCHUBP_CNTL:HUBP_DISABLE=1
+ DCHUBP_CNTL:HUBP_DISABLE=0
+ DCHUBBUB_SOFT_RESET:DCHUBBUB_GLOBAL_SOFT_RESET=0
+ DCSURF_PRIMARY_SURFACE_ADDRESS
+ DCHUBP_CNTL:HUBP_BLANK_EN=0
+ */
+
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx =
+ &dc->current_state->res_ctx.pipe_ctx[i];
+ if (pipe_ctx != NULL) {
+ hubp = pipe_ctx->plane_res.hubp;
+ /*DCHUBP_CNTL:HUBP_BLANK_EN=1*/
+ if (hubp != NULL)
+ hubp->funcs->set_hubp_blank_en(hubp, true);
+ }
+ }
+ /*DCHUBBUB_SOFT_RESET:DCHUBBUB_GLOBAL_SOFT_RESET=1*/
+ hubbub1_soft_reset(dc->res_pool->hubbub, true);
+
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx =
+ &dc->current_state->res_ctx.pipe_ctx[i];
+ if (pipe_ctx != NULL) {
+ hubp = pipe_ctx->plane_res.hubp;
+ /*DCHUBP_CNTL:HUBP_DISABLE=1*/
+ if (hubp != NULL)
+ hubp->funcs->hubp_disable_control(hubp, true);
+ }
+ }
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx =
+ &dc->current_state->res_ctx.pipe_ctx[i];
+ if (pipe_ctx != NULL) {
+ hubp = pipe_ctx->plane_res.hubp;
+ /*DCHUBP_CNTL:HUBP_DISABLE=0*/
+ if (hubp != NULL)
+ hubp->funcs->hubp_disable_control(hubp, true);
+ }
+ }
+ /*DCHUBBUB_SOFT_RESET:DCHUBBUB_GLOBAL_SOFT_RESET=0*/
+ hubbub1_soft_reset(dc->res_pool->hubbub, false);
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx =
+ &dc->current_state->res_ctx.pipe_ctx[i];
+ if (pipe_ctx != NULL) {
+ hubp = pipe_ctx->plane_res.hubp;
+ /*DCHUBP_CNTL:HUBP_BLANK_EN=0*/
+ if (hubp != NULL)
+ hubp->funcs->set_hubp_blank_en(hubp, true);
+ }
+ }
+ return true;
+
+}
+
+
static void dcn10_verify_allow_pstate_change_high(struct dc *dc)
{
static bool should_log_hw_state; /* prevent hw state log by default */
@@ -770,8 +854,12 @@ static void dcn10_verify_allow_pstate_change_high(struct dc *dc)
if (should_log_hw_state) {
dcn10_log_hw_state(dc);
}
-
BREAK_TO_DEBUGGER();
+ if (dcn10_hw_wa_force_recovery(dc)) {
+ /*check again*/
+ if (!hubbub1_verify_allow_pstate_change_high(dc->res_pool->hubbub))
+ BREAK_TO_DEBUGGER();
+ }
}
}
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
index 2c0a3150bf2d..16c84e9ee33b 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
@@ -446,6 +446,7 @@ static const struct dc_debug debug_defaults_drv = {
.vsr_support = true,
.performance_trace = false,
.az_endpoint_mute_only = true,
+ .recovery_enabled = false, /*enable this by default after testing.*/
};
static const struct dc_debug debug_defaults_diags = {
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h b/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
index 331f8ff57ed7..97df82cddf82 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
@@ -121,6 +121,8 @@ struct hubp_funcs {
void (*hubp_clk_cntl)(struct hubp *hubp, bool enable);
void (*hubp_vtg_sel)(struct hubp *hubp, uint32_t otg_inst);
void (*hubp_read_state)(struct hubp *hubp);
+ void (*hubp_disable_control)(struct hubp *hubp, bool disable_hubp);
+ unsigned int (*hubp_get_underflow_status)(struct hubp *hubp);
};
--
2.17.0
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