bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: Add tracing to dc

Browse Source 
[Why]
Tracing is a useful and cheap debug functionality

[How]
This creates a new trace system amdgpu_dm, currently with
three trace events

amdgpu_dc_rreg and amdgpu_dc_wreg report the address and value
of any dc register reads and writes

amdgpu_dc_performance requires at least one of those two to be
enabled.  It counts the register reads and writes since the
last entry

v2: Don't check for NULL before kfree

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis
2018-11-30 09:57:06 -05:00
committed by Alex Deucher
parent 5d66ef38bc
commit 0cf5eb76e2
6 changed files with 146 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/amd/display/dc/dm_services.h
View File

@@ -31,6 +31,8 @@
#define __DM_SERVICES_H__
#include "amdgpu_dm_trace.h"
/* TODO: remove when DC is complete. */
#include "dm_services_types.h"
#include "logger_interface.h"
@@ -70,6 +72,7 @@ static inline uint32_t dm_read_reg_func(
}
#endif
value = cgs_read_register(ctx->cgs_device, address);
trace_amdgpu_dc_rreg(&ctx->perf_trace->read_count, address, value);
return value;
}
@@ -90,6 +93,7 @@ static inline void dm_write_reg_func(
}
#endif
cgs_write_register(ctx->cgs_device, address, value);
trace_amdgpu_dc_wreg(&ctx->perf_trace->write_count, address, value);
}
static inline uint32_t dm_read_index_reg(
@@ -351,8 +355,12 @@ unsigned long long dm_get_elapse_time_in_ns(struct dc_context *ctx,
/*
* performance tracing
*/
void dm_perf_trace_timestamp(const char *func_name, unsigned int line);
#define PERF_TRACE() dm_perf_trace_timestamp(__func__, __LINE__)
#define PERF_TRACE() trace_amdgpu_dc_performance(CTX->perf_trace->read_count,\
CTX->perf_trace->write_count, &CTX->perf_trace->last_entry_read,\
&CTX->perf_trace->last_entry_write, __func__, __LINE__)
#define PERF_TRACE_CTX(__CTX) trace_amdgpu_dc_performance(__CTX->perf_trace->read_count,\
__CTX->perf_trace->write_count, &__CTX->perf_trace->last_entry_read,\
&__CTX->perf_trace->last_entry_write, __func__, __LINE__)
/*