On 2021-10-18 23:38, Lazar, Lijo wrote:
On 10/19/2021 5:19 AM, Luben Tuikov wrote:A current value of a clock frequency of 0, means that the IP block is in some kind of low power state. Ignore it and don't report it here. Here we only report the possible operating (non-zero) frequencies of the block requested. So, if the current clock value is 0, then print the DPM frequencies, but don't report a current value. v2: Don't report the minimum one as the current one when reported one is 0, i.e. don't add an asterisk (Lijo). LT: It is conceivable that this may confuse user-mode tools if they scan and look for a current one, i.e. look for an asterisk, but they'll have to adapt and use other methods for finding power states of the chip--we can't report 0 as current. v3: Start the subject title with a verb. (PaulM) Cc: Alex Deucher <Alexander.Deucher@xxxxxxx> Cc: Lijo Lazar <Lijo.Lazar@xxxxxxx> Cc: Paul Menzel <pmenzel@xxxxxxxxxxxxx> Signed-off-by: Luben Tuikov <luben.tuikov@xxxxxxx> --- .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c | 60 ++++++++++++------- 1 file changed, 40 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c index f630d5e928ccfe..6fe792be77dbbb 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c @@ -1040,7 +1040,8 @@ static void sienna_cichlid_get_od_setting_range(struct smu_11_0_7_overdrive_tabl } static int sienna_cichlid_print_clk_levels(struct smu_context *smu, - enum smu_clk_type clk_type, char *buf) + enum smu_clk_type clk_type, + char *buf) { struct amdgpu_device *adev = smu->adev; struct smu_table_context *table_context = &smu->smu_table; @@ -1052,12 +1053,12 @@ static int sienna_cichlid_print_clk_levels(struct smu_context *smu, OverDriveTable_t *od_table = (OverDriveTable_t *)table_context->overdrive_table; int i, size = 0, ret = 0; - uint32_t curr_value = 0, value = 0, count = 0; + uint32_t curr_value, value, count; uint32_t freq_value[3] = {0, 0, 0}; - uint32_t mark_index = 0; uint32_t gen_speed, lane_width; uint32_t min_value, max_value; uint32_t smu_version; + bool fine_grained; smu_cmn_get_sysfs_buf(&buf, &size); @@ -1077,6 +1078,20 @@ static int sienna_cichlid_print_clk_levels(struct smu_context *smu, if (ret) goto print_clk_out; + ret = smu_v11_0_get_dpm_freq_by_index(smu, clk_type, 0, + &freq_value[0]); + if (ret) + goto print_clk_out; + + /* A current value of a clock frequency of 0, means + * that the IP block is in some kind of low power + * state. Ignore it and don't report it here. Here we + * only report the possible operating (non-zero) + * frequencies of the block requested. So, if the + * current clock value is 0, then we don't report a + * "current" value from the DPM states, i.e. we don't + * add an asterisk. + */ /* no need to disable gfxoff when retrieving the current gfxclk */ if ((clk_type == SMU_GFXCLK) || (clk_type == SMU_SCLK)) @@ -1086,38 +1101,43 @@ static int sienna_cichlid_print_clk_levels(struct smu_context *smu, if (ret) goto print_clk_out; - if (!sienna_cichlid_supports_fine_grained_dpm(smu, clk_type)) { - for (i = 0; i < count; i++) { + fine_grained = sienna_cichlid_supports_fine_grained_dpm(smu, clk_type); + if (!fine_grained) { + /* We already got the 0-th index--print it + * here and continue thereafter. + */ + size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n", 0, freq_value[0], + curr_value == freq_value[0] ? "*" : ""); + for (i = 1; i < count; i++) { ret = smu_v11_0_get_dpm_freq_by_index(smu, clk_type, i, &value); if (ret) goto print_clk_out; - size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n", i, value, curr_value == value ? "*" : ""); } } else { - ret = smu_v11_0_get_dpm_freq_by_index(smu, clk_type, 0, &freq_value[0]); - if (ret) - goto print_clk_out; + freq_value[1] = curr_value ?: freq_value[0];Omitting second _expression_ is not standard C - https://gcc.gnu.org/onlinedocs/gcc/Conditionals.html
Lijo just clarified to me that:
well, i had to look up as I haven't seen it before
I hope the following should make it clear about its usage:
$cd linux/
$find . -name "*.[ch]" -exec grep -E "\?:" \{\} \+ | wc -l
1042
$_
Regards,
Luben
Thanks, Lijoret = smu_v11_0_get_dpm_freq_by_index(smu, clk_type, count - 1, &freq_value[2]); if (ret) goto print_clk_out; - freq_value[1] = curr_value; - mark_index = curr_value == freq_value[0] ? 0 : - curr_value == freq_value[2] ? 2 : 1; - - count = 3; - if (mark_index != 1) { + if (freq_value[1] == freq_value[0]) { + i = 1; + count = 3; + } else if (freq_value[1] == freq_value[2]) { + i = 0; count = 2; - freq_value[1] = freq_value[2]; + } else { + i = 0; + count = 3; } - for (i = 0; i < count; i++) { - size += sysfs_emit_at(buf, size, "%d: %uMhz %s\n", i, freq_value[i], - curr_value == freq_value[i] ? "*" : ""); + for ( ; i < count; i++) { + size += sysfs_emit_at(buf, size, + "%d: %uMhz %s\n", + i, freq_value[i], + curr_value == freq_value[i] ? "*" : ""); } - } break; case SMU_PCIE:
