From: Dmytro Laktyushkin <dmytro.laktyush...@amd.com>
Fix clamping to match register field size
Reviewed-by: Charlene Liu <charlene....@amd.com>
Acked-by: Jasdeep Dhillon <jdhil...@amd.com>
Signed-off-by: Dmytro Laktyushkin <dmytro.laktyush...@amd.com>
---
.../drm/amd/display/dc/dcn31/dcn31_hubbub.c | 61 ++++++++++---------
1 file changed, 32 insertions(+), 29 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
index 90c73a1cb986..5e3bcaf12cac 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
@@ -138,8 +138,11 @@ static uint32_t convert_and_clamp(
ret_val = wm_ns * refclk_mhz;
ret_val /= 1000;
- if (ret_val > clamp_value)
+ if (ret_val > clamp_value) {
+ /* clamping WMs is abnormal, unexpected and may lead to
underflow*/
+ ASSERT(0);
ret_val = clamp_value;
+ }
return ret_val;
}
@@ -159,7 +162,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->a.urgent_ns >
hubbub2->watermarks.a.urgent_ns) {
hubbub2->watermarks.a.urgent_ns = watermarks->a.urgent_ns;
prog_wm_value = convert_and_clamp(watermarks->a.urgent_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, 0,
DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A,
prog_wm_value);
@@ -193,7 +196,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->a.urgent_latency_ns >
hubbub2->watermarks.a.urgent_latency_ns) {
hubbub2->watermarks.a.urgent_latency_ns =
watermarks->a.urgent_latency_ns;
prog_wm_value =
convert_and_clamp(watermarks->a.urgent_latency_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A, 0,
DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A,
prog_wm_value);
} else if (watermarks->a.urgent_latency_ns <
hubbub2->watermarks.a.urgent_latency_ns)
@@ -203,7 +206,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->b.urgent_ns >
hubbub2->watermarks.b.urgent_ns) {
hubbub2->watermarks.b.urgent_ns = watermarks->b.urgent_ns;
prog_wm_value = convert_and_clamp(watermarks->b.urgent_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, 0,
DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B,
prog_wm_value);
@@ -237,7 +240,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->b.urgent_latency_ns >
hubbub2->watermarks.b.urgent_latency_ns) {
hubbub2->watermarks.b.urgent_latency_ns =
watermarks->b.urgent_latency_ns;
prog_wm_value =
convert_and_clamp(watermarks->b.urgent_latency_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B, 0,
DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B,
prog_wm_value);
} else if (watermarks->b.urgent_latency_ns <
hubbub2->watermarks.b.urgent_latency_ns)
@@ -247,7 +250,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->c.urgent_ns >
hubbub2->watermarks.c.urgent_ns) {
hubbub2->watermarks.c.urgent_ns = watermarks->c.urgent_ns;
prog_wm_value = convert_and_clamp(watermarks->c.urgent_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, 0,
DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C,
prog_wm_value);
@@ -281,7 +284,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->c.urgent_latency_ns >
hubbub2->watermarks.c.urgent_latency_ns) {
hubbub2->watermarks.c.urgent_latency_ns =
watermarks->c.urgent_latency_ns;
prog_wm_value =
convert_and_clamp(watermarks->c.urgent_latency_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C, 0,
DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C,
prog_wm_value);
} else if (watermarks->c.urgent_latency_ns <
hubbub2->watermarks.c.urgent_latency_ns)
@@ -291,7 +294,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->d.urgent_ns >
hubbub2->watermarks.d.urgent_ns) {
hubbub2->watermarks.d.urgent_ns = watermarks->d.urgent_ns;
prog_wm_value = convert_and_clamp(watermarks->d.urgent_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, 0,
DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D,
prog_wm_value);
@@ -325,7 +328,7 @@ static bool hubbub31_program_urgent_watermarks(
if (safe_to_lower || watermarks->d.urgent_latency_ns >
hubbub2->watermarks.d.urgent_latency_ns) {
hubbub2->watermarks.d.urgent_latency_ns =
watermarks->d.urgent_latency_ns;
prog_wm_value =
convert_and_clamp(watermarks->d.urgent_latency_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0x3fff);
REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D, 0,
DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D,
prog_wm_value);
} else if (watermarks->d.urgent_latency_ns <
hubbub2->watermarks.d.urgent_latency_ns)
@@ -351,7 +354,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_A calculated
=%d\n"
@@ -367,7 +370,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->a.cstate_pstate.cstate_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->a.cstate_pstate.cstate_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_A calculated =%d\n"
@@ -383,7 +386,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->a.cstate_pstate.cstate_enter_plus_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->a.cstate_pstate.cstate_enter_plus_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_A, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_A,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_WATERMARK_Z8_A calculated
=%d\n"
@@ -399,7 +402,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->a.cstate_pstate.cstate_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->a.cstate_pstate.cstate_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_A, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_A,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_Z8_A calculated =%d\n"
@@ -416,7 +419,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_B calculated
=%d\n"
@@ -432,7 +435,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->b.cstate_pstate.cstate_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->b.cstate_pstate.cstate_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_B calculated =%d\n"
@@ -448,7 +451,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->b.cstate_pstate.cstate_enter_plus_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->b.cstate_pstate.cstate_enter_plus_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_B, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_B,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_WATERMARK_Z8_B calculated
=%d\n"
@@ -464,7 +467,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->b.cstate_pstate.cstate_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->b.cstate_pstate.cstate_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_B, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_B,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_Z8_B calculated =%d\n"
@@ -481,7 +484,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_C calculated
=%d\n"
@@ -497,7 +500,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->c.cstate_pstate.cstate_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->c.cstate_pstate.cstate_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_C calculated =%d\n"
@@ -513,7 +516,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->c.cstate_pstate.cstate_enter_plus_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->c.cstate_pstate.cstate_enter_plus_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_C, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_C,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_WATERMARK_Z8_C calculated
=%d\n"
@@ -529,7 +532,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->c.cstate_pstate.cstate_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->c.cstate_pstate.cstate_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_C, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_C,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_Z8_C calculated =%d\n"
@@ -546,7 +549,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_D calculated
=%d\n"
@@ -562,7 +565,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->d.cstate_pstate.cstate_exit_ns;
prog_wm_value = convert_and_clamp(
watermarks->d.cstate_pstate.cstate_exit_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_D calculated =%d\n"
@@ -578,7 +581,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->d.cstate_pstate.cstate_enter_plus_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->d.cstate_pstate.cstate_enter_plus_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_D, 0,
DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_D,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_ENTER_WATERMARK_Z8_D calculated
=%d\n"
@@ -594,7 +597,7 @@ static bool hubbub31_program_stutter_watermarks(
watermarks->d.cstate_pstate.cstate_exit_z8_ns;
prog_wm_value = convert_and_clamp(
watermarks->d.cstate_pstate.cstate_exit_z8_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_D, 0,
DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_Z8_D,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_Z8_D calculated =%d\n"
@@ -625,7 +628,7 @@ static bool hubbub31_program_pstate_watermarks(
watermarks->a.cstate_pstate.pstate_change_ns;
prog_wm_value = convert_and_clamp(
watermarks->a.cstate_pstate.pstate_change_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A, 0,
DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_A calculated
=%d\n"
@@ -642,7 +645,7 @@ static bool hubbub31_program_pstate_watermarks(
watermarks->b.cstate_pstate.pstate_change_ns;
prog_wm_value = convert_and_clamp(
watermarks->b.cstate_pstate.pstate_change_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B, 0,
DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_B calculated
=%d\n"
@@ -659,7 +662,7 @@ static bool hubbub31_program_pstate_watermarks(
watermarks->c.cstate_pstate.pstate_change_ns;
prog_wm_value = convert_and_clamp(
watermarks->c.cstate_pstate.pstate_change_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C, 0,
DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_C calculated
=%d\n"
@@ -676,7 +679,7 @@ static bool hubbub31_program_pstate_watermarks(
watermarks->d.cstate_pstate.pstate_change_ns;
prog_wm_value = convert_and_clamp(
watermarks->d.cstate_pstate.pstate_change_ns,
- refclk_mhz, 0x1fffff);
+ refclk_mhz, 0xffff);
REG_SET(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, 0,
DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D,
prog_wm_value);
DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_D calculated
=%d\n"
--
2.25.1
