Re: [PATCH] drm/amdgpu/pm: fix powerplay OD interface

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Am 23.11.21 um 21:01 schrieb Alex Deucher:

The overclocking interface currently appends data to a
string.  Revert back to using sprintf().

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1774
Fixes: 6db0c87a0a8ee1 ("amdgpu/pm: Replace hwmgr smu usage of sprintf with sysfs_emit")
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>


Acked-by: Christian König <christian.koenig@xxxxxxx>


---
  .../drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c  | 20 +++----
  .../drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c   | 24 ++++----
  .../drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c   |  6 +-
  .../drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c | 28 +++++----
  .../drm/amd/pm/powerplay/hwmgr/vega12_hwmgr.c | 10 ++--
  .../drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c | 58 +++++++++----------
  6 files changed, 67 insertions(+), 79 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c
index 258c573acc97..1f406f21b452 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c
@@ -1024,8 +1024,6 @@ static int smu10_print_clock_levels(struct pp_hwmgr *hwmgr,
  	uint32_t min_freq, max_freq = 0;
  	uint32_t ret = 0;
- phm_get_sysfs_buf(&buf, &size); 
-
  	switch (type) {
  	case PP_SCLK:
  		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_GetGfxclkFrequency, &now);
@@ -1038,13 +1036,13 @@ static int smu10_print_clock_levels(struct pp_hwmgr *hwmgr,
  		else
  			i = 1;
- size += sysfs_emit_at(buf, size, "0: %uMhz %s\n", 
+		size += sprintf(buf + size, "0: %uMhz %s\n",
  					data->gfx_min_freq_limit/100,
  					i == 0 ? "*" : "");
-		size += sysfs_emit_at(buf, size, "1: %uMhz %s\n",
+		size += sprintf(buf + size, "1: %uMhz %s\n",
  					i == 1 ? now : SMU10_UMD_PSTATE_GFXCLK,
  					i == 1 ? "*" : "");
-		size += sysfs_emit_at(buf, size, "2: %uMhz %s\n",
+		size += sprintf(buf + size, "2: %uMhz %s\n",
  					data->gfx_max_freq_limit/100,
  					i == 2 ? "*" : "");
  		break;
@@ -1052,7 +1050,7 @@ static int smu10_print_clock_levels(struct pp_hwmgr *hwmgr,
  		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_GetFclkFrequency, &now);
for (i = 0; i < mclk_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i,
  					mclk_table->entries[i].clk / 100,
  					((mclk_table->entries[i].clk / 100)
@@ -1067,10 +1065,10 @@ static int smu10_print_clock_levels(struct pp_hwmgr *hwmgr,
  			if (ret)
  				return ret;
- size += sysfs_emit_at(buf, size, "%s:\n", "OD_SCLK"); 
-			size += sysfs_emit_at(buf, size, "0: %10uMhz\n",
+			size += sprintf(buf + size, "%s:\n", "OD_SCLK");
+			size += sprintf(buf + size, "0: %10uMhz\n",
  			(data->gfx_actual_soft_min_freq > 0) ? data->gfx_actual_soft_min_freq : min_freq);
-			size += sysfs_emit_at(buf, size, "1: %10uMhz\n",
+			size += sprintf(buf + size, "1: %10uMhz\n",
  			(data->gfx_actual_soft_max_freq > 0) ? data->gfx_actual_soft_max_freq : max_freq);
  		}
  		break;
@@ -1083,8 +1081,8 @@ static int smu10_print_clock_levels(struct pp_hwmgr *hwmgr,
  			if (ret)
  				return ret;
- size += sysfs_emit_at(buf, size, "%s:\n", "OD_RANGE"); 
-			size += sysfs_emit_at(buf, size, "SCLK: %7uMHz %10uMHz\n",
+			size += sprintf(buf + size, "%s:\n", "OD_RANGE");
+			size += sprintf(buf + size, "SCLK: %7uMHz %10uMHz\n",
  				min_freq, max_freq);
  		}
  		break;
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
index aceebf584225..611969bf4520 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
@@ -4914,8 +4914,6 @@ static int smu7_print_clock_levels(struct pp_hwmgr *hwmgr,
  	int size = 0;
  	uint32_t i, now, clock, pcie_speed;
- phm_get_sysfs_buf(&buf, &size); 
-
  	switch (type) {
  	case PP_SCLK:
  		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_API_GetSclkFrequency, &clock);
@@ -4928,7 +4926,7 @@ static int smu7_print_clock_levels(struct pp_hwmgr *hwmgr,
  		now = i;
for (i = 0; i < sclk_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, sclk_table->dpm_levels[i].value / 100,
  					(i == now) ? "*" : "");
  		break;
@@ -4943,7 +4941,7 @@ static int smu7_print_clock_levels(struct pp_hwmgr *hwmgr,
  		now = i;
for (i = 0; i < mclk_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, mclk_table->dpm_levels[i].value / 100,
  					(i == now) ? "*" : "");
  		break;
@@ -4957,7 +4955,7 @@ static int smu7_print_clock_levels(struct pp_hwmgr *hwmgr,
  		now = i;
for (i = 0; i < pcie_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %s %s\n", i,
+			size += sprintf(buf + size, "%d: %s %s\n", i,
  					(pcie_table->dpm_levels[i].value == 0) ? "2.5GT/s, x8" :
  					(pcie_table->dpm_levels[i].value == 1) ? "5.0GT/s, x16" :
  					(pcie_table->dpm_levels[i].value == 2) ? "8.0GT/s, x16" : "",
@@ -4965,32 +4963,32 @@ static int smu7_print_clock_levels(struct pp_hwmgr *hwmgr,
  		break;
  	case OD_SCLK:
  		if (hwmgr->od_enabled) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_SCLK");
+			size += sprintf(buf + size, "%s:\n", "OD_SCLK");
  			for (i = 0; i < odn_sclk_table->num_of_pl; i++)
-				size += sysfs_emit_at(buf, size, "%d: %10uMHz %10umV\n",
+				size += sprintf(buf + size, "%d: %10uMHz %10umV\n",
  					i, odn_sclk_table->entries[i].clock/100,
  					odn_sclk_table->entries[i].vddc);
  		}
  		break;
  	case OD_MCLK:
  		if (hwmgr->od_enabled) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_MCLK");
+			size += sprintf(buf + size, "%s:\n", "OD_MCLK");
  			for (i = 0; i < odn_mclk_table->num_of_pl; i++)
-				size += sysfs_emit_at(buf, size, "%d: %10uMHz %10umV\n",
+				size += sprintf(buf + size, "%d: %10uMHz %10umV\n",
  					i, odn_mclk_table->entries[i].clock/100,
  					odn_mclk_table->entries[i].vddc);
  		}
  		break;
  	case OD_RANGE:
  		if (hwmgr->od_enabled) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_RANGE");
-			size += sysfs_emit_at(buf, size, "SCLK: %7uMHz %10uMHz\n",
+			size += sprintf(buf + size, "%s:\n", "OD_RANGE");
+			size += sprintf(buf + size, "SCLK: %7uMHz %10uMHz\n",
  				data->golden_dpm_table.sclk_table.dpm_levels[0].value/100,
  				hwmgr->platform_descriptor.overdriveLimit.engineClock/100);
-			size += sysfs_emit_at(buf, size, "MCLK: %7uMHz %10uMHz\n",
+			size += sprintf(buf + size, "MCLK: %7uMHz %10uMHz\n",
  				data->golden_dpm_table.mclk_table.dpm_levels[0].value/100,
  				hwmgr->platform_descriptor.overdriveLimit.memoryClock/100);
-			size += sysfs_emit_at(buf, size, "VDDC: %7umV %11umV\n",
+			size += sprintf(buf + size, "VDDC: %7umV %11umV\n",
  				data->odn_dpm_table.min_vddc,
  				data->odn_dpm_table.max_vddc);
  		}
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c
index 8e28a8eecefc..03bf8f069222 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c
@@ -1550,8 +1550,6 @@ static int smu8_print_clock_levels(struct pp_hwmgr *hwmgr,
  	uint32_t i, now;
  	int size = 0;
- phm_get_sysfs_buf(&buf, &size); 
-
  	switch (type) {
  	case PP_SCLK:
  		now = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device,
@@ -1561,7 +1559,7 @@ static int smu8_print_clock_levels(struct pp_hwmgr *hwmgr,
  				CURR_SCLK_INDEX);
for (i = 0; i < sclk_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, sclk_table->entries[i].clk / 100,
  					(i == now) ? "*" : "");
  		break;
@@ -1573,7 +1571,7 @@ static int smu8_print_clock_levels(struct pp_hwmgr *hwmgr,
  				CURR_MCLK_INDEX);
for (i = SMU8_NUM_NBPMEMORYCLOCK; i > 0; i--) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					SMU8_NUM_NBPMEMORYCLOCK-i, data->sys_info.nbp_memory_clock[i-1] / 100,
  					(SMU8_NUM_NBPMEMORYCLOCK-i == now) ? "*" : "");
  		break;
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
index c981fc2882f0..e6336654c565 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
@@ -4639,8 +4639,6 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
int i, now, size = 0, count = 0; - phm_get_sysfs_buf(&buf, &size); 
-
  	switch (type) {
  	case PP_SCLK:
  		if (data->registry_data.sclk_dpm_key_disabled)
@@ -4654,7 +4652,7 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
  		else
  			count = sclk_table->count;
  		for (i = 0; i < count; i++)
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, sclk_table->dpm_levels[i].value / 100,
  					(i == now) ? "*" : "");
  		break;
@@ -4665,7 +4663,7 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
  		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_GetCurrentUclkIndex, &now);
for (i = 0; i < mclk_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, mclk_table->dpm_levels[i].value / 100,
  					(i == now) ? "*" : "");
  		break;
@@ -4676,7 +4674,7 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
  		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_GetCurrentSocclkIndex, &now);
for (i = 0; i < soc_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, soc_table->dpm_levels[i].value / 100,
  					(i == now) ? "*" : "");
  		break;
@@ -4688,7 +4686,7 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
  				PPSMC_MSG_GetClockFreqMHz, CLK_DCEFCLK, &now);
for (i = 0; i < dcef_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  					i, dcef_table->dpm_levels[i].value / 100,
  					(dcef_table->dpm_levels[i].value / 100 == now) ?
  					"*" : "");
@@ -4702,7 +4700,7 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
  			gen_speed = pptable->PcieGenSpeed[i];
  			lane_width = pptable->PcieLaneCount[i];
- size += sysfs_emit_at(buf, size, "%d: %s %s %s\n", i, 
+			size += sprintf(buf + size, "%d: %s %s %s\n", i,
  					(gen_speed == 0) ? "2.5GT/s," :
  					(gen_speed == 1) ? "5.0GT/s," :
  					(gen_speed == 2) ? "8.0GT/s," :
@@ -4721,34 +4719,34 @@ static int vega10_print_clock_levels(struct pp_hwmgr *hwmgr,
case OD_SCLK: 
  		if (hwmgr->od_enabled) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_SCLK");
+			size += sprintf(buf + size, "%s:\n", "OD_SCLK");
  			podn_vdd_dep = &data->odn_dpm_table.vdd_dep_on_sclk;
  			for (i = 0; i < podn_vdd_dep->count; i++)
-				size += sysfs_emit_at(buf, size, "%d: %10uMhz %10umV\n",
+				size += sprintf(buf + size, "%d: %10uMhz %10umV\n",
  					i, podn_vdd_dep->entries[i].clk / 100,
  						podn_vdd_dep->entries[i].vddc);
  		}
  		break;
  	case OD_MCLK:
  		if (hwmgr->od_enabled) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_MCLK");
+			size += sprintf(buf + size, "%s:\n", "OD_MCLK");
  			podn_vdd_dep = &data->odn_dpm_table.vdd_dep_on_mclk;
  			for (i = 0; i < podn_vdd_dep->count; i++)
-				size += sysfs_emit_at(buf, size, "%d: %10uMhz %10umV\n",
+				size += sprintf(buf + size, "%d: %10uMhz %10umV\n",
  					i, podn_vdd_dep->entries[i].clk/100,
  						podn_vdd_dep->entries[i].vddc);
  		}
  		break;
  	case OD_RANGE:
  		if (hwmgr->od_enabled) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_RANGE");
-			size += sysfs_emit_at(buf, size, "SCLK: %7uMHz %10uMHz\n",
+			size += sprintf(buf + size, "%s:\n", "OD_RANGE");
+			size += sprintf(buf + size, "SCLK: %7uMHz %10uMHz\n",
  				data->golden_dpm_table.gfx_table.dpm_levels[0].value/100,
  				hwmgr->platform_descriptor.overdriveLimit.engineClock/100);
-			size += sysfs_emit_at(buf, size, "MCLK: %7uMHz %10uMHz\n",
+			size += sprintf(buf + size, "MCLK: %7uMHz %10uMHz\n",
  				data->golden_dpm_table.mem_table.dpm_levels[0].value/100,
  				hwmgr->platform_descriptor.overdriveLimit.memoryClock/100);
-			size += sysfs_emit_at(buf, size, "VDDC: %7umV %11umV\n",
+			size += sprintf(buf + size, "VDDC: %7umV %11umV\n",
  				data->odn_dpm_table.min_vddc,
  				data->odn_dpm_table.max_vddc);
  		}
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_hwmgr.c
index f7e783e1c888..a2f4d6773d45 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_hwmgr.c
@@ -2246,8 +2246,6 @@ static int vega12_print_clock_levels(struct pp_hwmgr *hwmgr,
  	int i, now, size = 0;
  	struct pp_clock_levels_with_latency clocks;
- phm_get_sysfs_buf(&buf, &size); 
-
  	switch (type) {
  	case PP_SCLK:
  		PP_ASSERT_WITH_CODE(
@@ -2260,7 +2258,7 @@ static int vega12_print_clock_levels(struct pp_hwmgr *hwmgr,
  				"Attempt to get gfx clk levels Failed!",
  				return -1);
  		for (i = 0; i < clocks.num_levels; i++)
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz / 1000 == now / 100) ? "*" : "");
  		break;
@@ -2276,7 +2274,7 @@ static int vega12_print_clock_levels(struct pp_hwmgr *hwmgr,
  				"Attempt to get memory clk levels Failed!",
  				return -1);
  		for (i = 0; i < clocks.num_levels; i++)
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz / 1000 == now / 100) ? "*" : "");
  		break;
@@ -2294,7 +2292,7 @@ static int vega12_print_clock_levels(struct pp_hwmgr *hwmgr,
  				"Attempt to get soc clk levels Failed!",
  				return -1);
  		for (i = 0; i < clocks.num_levels; i++)
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz / 1000 == now) ? "*" : "");
  		break;
@@ -2312,7 +2310,7 @@ static int vega12_print_clock_levels(struct pp_hwmgr *hwmgr,
  				"Attempt to get dcef clk levels Failed!",
  				return -1);
  		for (i = 0; i < clocks.num_levels; i++)
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz / 1000 == now) ? "*" : "");
  		break;
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c
index 03e63be4ee27..85d55ab4e369 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c
@@ -3366,8 +3366,6 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  	int ret = 0;
  	uint32_t gen_speed, lane_width, current_gen_speed, current_lane_width;
- phm_get_sysfs_buf(&buf, &size); 
-
  	switch (type) {
  	case PP_SCLK:
  		ret = vega20_get_current_clk_freq(hwmgr, PPCLK_GFXCLK, &now);
@@ -3376,13 +3374,13 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  				return ret);
if (vega20_get_sclks(hwmgr, &clocks)) { 
-			size += sysfs_emit_at(buf, size, "0: %uMhz * (DPM disabled)\n",
+			size += sprintf(buf + size, "0: %uMhz * (DPM disabled)\n",
  				now / 100);
  			break;
  		}
for (i = 0; i < clocks.num_levels; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
  		break;
@@ -3394,13 +3392,13 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  				return ret);
if (vega20_get_memclocks(hwmgr, &clocks)) { 
-			size += sysfs_emit_at(buf, size, "0: %uMhz * (DPM disabled)\n",
+			size += sprintf(buf + size, "0: %uMhz * (DPM disabled)\n",
  				now / 100);
  			break;
  		}
for (i = 0; i < clocks.num_levels; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
  		break;
@@ -3412,13 +3410,13 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  				return ret);
if (vega20_get_socclocks(hwmgr, &clocks)) { 
-			size += sysfs_emit_at(buf, size, "0: %uMhz * (DPM disabled)\n",
+			size += sprintf(buf + size, "0: %uMhz * (DPM disabled)\n",
  				now / 100);
  			break;
  		}
for (i = 0; i < clocks.num_levels; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
  		break;
@@ -3430,7 +3428,7 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  				return ret);
for (i = 0; i < fclk_dpm_table->count; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, fclk_dpm_table->dpm_levels[i].value,
  				fclk_dpm_table->dpm_levels[i].value == (now / 100) ? "*" : "");
  		break;
@@ -3442,13 +3440,13 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  				return ret);
if (vega20_get_dcefclocks(hwmgr, &clocks)) { 
-			size += sysfs_emit_at(buf, size, "0: %uMhz * (DPM disabled)\n",
+			size += sprintf(buf + size, "0: %uMhz * (DPM disabled)\n",
  				now / 100);
  			break;
  		}
for (i = 0; i < clocks.num_levels; i++) 
-			size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n",
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
  				i, clocks.data[i].clocks_in_khz / 1000,
  				(clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
  		break;
@@ -3462,7 +3460,7 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  			gen_speed = pptable->PcieGenSpeed[i];
  			lane_width = pptable->PcieLaneCount[i];
- size += sysfs_emit_at(buf, size, "%d: %s %s %dMhz %s\n", i, 
+			size += sprintf(buf + size, "%d: %s %s %dMhz %s\n", i,
  					(gen_speed == 0) ? "2.5GT/s," :
  					(gen_speed == 1) ? "5.0GT/s," :
  					(gen_speed == 2) ? "8.0GT/s," :
@@ -3483,18 +3481,18 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  	case OD_SCLK:
  		if (od8_settings[OD8_SETTING_GFXCLK_FMIN].feature_id &&
  		    od8_settings[OD8_SETTING_GFXCLK_FMAX].feature_id) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_SCLK");
-			size += sysfs_emit_at(buf, size, "0: %10uMhz\n",
+			size += sprintf(buf + size, "%s:\n", "OD_SCLK");
+			size += sprintf(buf + size, "0: %10uMhz\n",
  				od_table->GfxclkFmin);
-			size += sysfs_emit_at(buf, size, "1: %10uMhz\n",
+			size += sprintf(buf + size, "1: %10uMhz\n",
  				od_table->GfxclkFmax);
  		}
  		break;
case OD_MCLK: 
  		if (od8_settings[OD8_SETTING_UCLK_FMAX].feature_id) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_MCLK");
-			size += sysfs_emit_at(buf, size, "1: %10uMhz\n",
+			size += sprintf(buf + size, "%s:\n", "OD_MCLK");
+			size += sprintf(buf + size, "1: %10uMhz\n",
  				od_table->UclkFmax);
  		}
@@ -3507,14 +3505,14 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr, 
  		    od8_settings[OD8_SETTING_GFXCLK_VOLTAGE1].feature_id &&
  		    od8_settings[OD8_SETTING_GFXCLK_VOLTAGE2].feature_id &&
  		    od8_settings[OD8_SETTING_GFXCLK_VOLTAGE3].feature_id) {
-			size += sysfs_emit_at(buf, size, "%s:\n", "OD_VDDC_CURVE");
-			size += sysfs_emit_at(buf, size, "0: %10uMhz %10dmV\n",
+			size += sprintf(buf + size, "%s:\n", "OD_VDDC_CURVE");
+			size += sprintf(buf + size, "0: %10uMhz %10dmV\n",
  				od_table->GfxclkFreq1,
  				od_table->GfxclkVolt1 / VOLTAGE_SCALE);
-			size += sysfs_emit_at(buf, size, "1: %10uMhz %10dmV\n",
+			size += sprintf(buf + size, "1: %10uMhz %10dmV\n",
  				od_table->GfxclkFreq2,
  				od_table->GfxclkVolt2 / VOLTAGE_SCALE);
-			size += sysfs_emit_at(buf, size, "2: %10uMhz %10dmV\n",
+			size += sprintf(buf + size, "2: %10uMhz %10dmV\n",
  				od_table->GfxclkFreq3,
  				od_table->GfxclkVolt3 / VOLTAGE_SCALE);
  		}
@@ -3522,17 +3520,17 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  		break;
case OD_RANGE: 
-		size += sysfs_emit_at(buf, size, "%s:\n", "OD_RANGE");
+		size += sprintf(buf + size, "%s:\n", "OD_RANGE");
if (od8_settings[OD8_SETTING_GFXCLK_FMIN].feature_id && 
  		    od8_settings[OD8_SETTING_GFXCLK_FMAX].feature_id) {
-			size += sysfs_emit_at(buf, size, "SCLK: %7uMhz %10uMhz\n",
+			size += sprintf(buf + size, "SCLK: %7uMhz %10uMhz\n",
  				od8_settings[OD8_SETTING_GFXCLK_FMIN].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_FMAX].max_value);
  		}
if (od8_settings[OD8_SETTING_UCLK_FMAX].feature_id) { 
-			size += sysfs_emit_at(buf, size, "MCLK: %7uMhz %10uMhz\n",
+			size += sprintf(buf + size, "MCLK: %7uMhz %10uMhz\n",
  				od8_settings[OD8_SETTING_UCLK_FMAX].min_value,
  				od8_settings[OD8_SETTING_UCLK_FMAX].max_value);
  		}
@@ -3543,22 +3541,22 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
  		    od8_settings[OD8_SETTING_GFXCLK_VOLTAGE1].feature_id &&
  		    od8_settings[OD8_SETTING_GFXCLK_VOLTAGE2].feature_id &&
  		    od8_settings[OD8_SETTING_GFXCLK_VOLTAGE3].feature_id) {
-			size += sysfs_emit_at(buf, size, "VDDC_CURVE_SCLK[0]: %7uMhz %10uMhz\n",
+			size += sprintf(buf + size, "VDDC_CURVE_SCLK[0]: %7uMhz %10uMhz\n",
  				od8_settings[OD8_SETTING_GFXCLK_FREQ1].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_FREQ1].max_value);
-			size += sysfs_emit_at(buf, size, "VDDC_CURVE_VOLT[0]: %7dmV %11dmV\n",
+			size += sprintf(buf + size, "VDDC_CURVE_VOLT[0]: %7dmV %11dmV\n",
  				od8_settings[OD8_SETTING_GFXCLK_VOLTAGE1].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_VOLTAGE1].max_value);
-			size += sysfs_emit_at(buf, size, "VDDC_CURVE_SCLK[1]: %7uMhz %10uMhz\n",
+			size += sprintf(buf + size, "VDDC_CURVE_SCLK[1]: %7uMhz %10uMhz\n",
  				od8_settings[OD8_SETTING_GFXCLK_FREQ2].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_FREQ2].max_value);
-			size += sysfs_emit_at(buf, size, "VDDC_CURVE_VOLT[1]: %7dmV %11dmV\n",
+			size += sprintf(buf + size, "VDDC_CURVE_VOLT[1]: %7dmV %11dmV\n",
  				od8_settings[OD8_SETTING_GFXCLK_VOLTAGE2].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_VOLTAGE2].max_value);
-			size += sysfs_emit_at(buf, size, "VDDC_CURVE_SCLK[2]: %7uMhz %10uMhz\n",
+			size += sprintf(buf + size, "VDDC_CURVE_SCLK[2]: %7uMhz %10uMhz\n",
  				od8_settings[OD8_SETTING_GFXCLK_FREQ3].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_FREQ3].max_value);
-			size += sysfs_emit_at(buf, size, "VDDC_CURVE_VOLT[2]: %7dmV %11dmV\n",
+			size += sprintf(buf + size, "VDDC_CURVE_VOLT[2]: %7dmV %11dmV\n",
  				od8_settings[OD8_SETTING_GFXCLK_VOLTAGE3].min_value,
  				od8_settings[OD8_SETTING_GFXCLK_VOLTAGE3].max_value);
  		}
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