[PATCH 4/4] drm/amd/powerplay: support retrieving and adjusting dcefclock power levels
Quan, Evan
Evan.Quan at amd.com
Tue Jan 15 06:44:24 UTC 2019
I think we can use asic_type to determine whether to expose these new interfaces.
If (adev->asic_type >= CHIP_VEGA10), socclk and dcefclk are OK to expose
If (adev->asic_type >= CHIP_VEGA20), fclk is OK to expose
Regards,
Evan
> -----Original Message-----
> From: Alex Deucher <alexdeucher at gmail.com>
> Sent: Tuesday, January 15, 2019 1:00 AM
> To: Quan, Evan <Evan.Quan at amd.com>
> Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Deucher, Alexander
> <Alexander.Deucher at amd.com>
> Subject: Re: [PATCH 4/4] drm/amd/powerplay: support retrieving and
> adjusting dcefclock power levels
>
> On Mon, Jan 14, 2019 at 5:02 AM Evan Quan <evan.quan at amd.com> wrote:
> >
> > User can use "pp_dpm_dcefclk" to retrieve and adjust dcefclock power
> > levels.
> >
> > Change-Id: Ia3f61558ca96104c88d129ba5194103b2fe702ec
> > Signed-off-by: Evan Quan <evan.quan at amd.com>
>
> We should probably find a way to hide these new files on asics which don't
> support them. Other than that, the series looks good to me.
>
> Alex
>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 53
> ++++++++++++++++++-
> > .../gpu/drm/amd/include/kgd_pp_interface.h | 1 +
> > .../drm/amd/powerplay/hwmgr/vega20_hwmgr.c | 52
> +++++++++++++++++-
> > 3 files changed, 103 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > index f6646a522c06..b7b70f590236 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > @@ -731,11 +731,13 @@ static ssize_t
> > amdgpu_get_ppfeature_status(struct device *dev, }
> >
> > /**
> > - * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_fclk
> pp_dpm_pcie
> > + * DOC: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_fclk
> > + pp_dpm_dcefclk
> > + * pp_dpm_pcie
> > *
> > * The amdgpu driver provides a sysfs API for adjusting what power levels
> > * are enabled for a given power state. The files pp_dpm_sclk,
> > pp_dpm_mclk,
> > - * pp_dpm_socclk, pp_dpm_fclk and pp_dpm_pcie are used for this.
> > + * pp_dpm_socclk, pp_dpm_fclk, pp_dpm_dcefclk and pp_dpm_pcie are
> > + used for
> > + * this.
> > *
> > * Reading back the files will show you the available power levels within
> > * the power state and the clock information for those levels.
> > @@ -745,6 +747,8 @@ static ssize_t amdgpu_get_ppfeature_status(struct
> device *dev,
> > * Secondly,Enter a new value for each level by inputing a string that
> > * contains " echo xx xx xx > pp_dpm_sclk/mclk/pcie"
> > * E.g., echo 4 5 6 to > pp_dpm_sclk will enable sclk levels 4, 5, and 6.
> > + *
> > + * NOTE: change to the dcefclk max dpm level is not supported now
> > */
> >
> > static ssize_t amdgpu_get_pp_dpm_sclk(struct device *dev, @@ -927,6
> > +931,42 @@ static ssize_t amdgpu_set_pp_dpm_fclk(struct device *dev,
> > return count;
> > }
> >
> > +static ssize_t amdgpu_get_pp_dpm_dcefclk(struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct drm_device *ddev = dev_get_drvdata(dev);
> > + struct amdgpu_device *adev = ddev->dev_private;
> > +
> > + if (adev->powerplay.pp_funcs->print_clock_levels)
> > + return amdgpu_dpm_print_clock_levels(adev, PP_DCEFCLK, buf);
> > + else
> > + return snprintf(buf, PAGE_SIZE, "\n"); }
> > +
> > +static ssize_t amdgpu_set_pp_dpm_dcefclk(struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf,
> > + size_t count)
> > +{
> > + struct drm_device *ddev = dev_get_drvdata(dev);
> > + struct amdgpu_device *adev = ddev->dev_private;
> > + int ret;
> > + uint32_t mask = 0;
> > +
> > + ret = amdgpu_read_mask(buf, count, &mask);
> > + if (ret)
> > + return ret;
> > +
> > + if (adev->powerplay.pp_funcs->force_clock_level)
> > + ret = amdgpu_dpm_force_clock_level(adev, PP_DCEFCLK,
> > + mask);
> > +
> > + if (ret)
> > + return -EINVAL;
> > +
> > + return count;
> > +}
> > +
> > static ssize_t amdgpu_get_pp_dpm_pcie(struct device *dev,
> > struct device_attribute *attr,
> > char *buf)
> > @@ -1216,6 +1256,9 @@ static DEVICE_ATTR(pp_dpm_socclk, S_IRUGO |
> > S_IWUSR, static DEVICE_ATTR(pp_dpm_fclk, S_IRUGO | S_IWUSR,
> > amdgpu_get_pp_dpm_fclk,
> > amdgpu_set_pp_dpm_fclk);
> > +static DEVICE_ATTR(pp_dpm_dcefclk, S_IRUGO | S_IWUSR,
> > + amdgpu_get_pp_dpm_dcefclk,
> > + amdgpu_set_pp_dpm_dcefclk);
> > static DEVICE_ATTR(pp_dpm_pcie, S_IRUGO | S_IWUSR,
> > amdgpu_get_pp_dpm_pcie,
> > amdgpu_set_pp_dpm_pcie); @@ -2387,6 +2430,11 @@ int
> > amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
> > DRM_ERROR("failed to create device file pp_dpm_fclk\n");
> > return ret;
> > }
> > + ret = device_create_file(adev->dev, &dev_attr_pp_dpm_dcefclk);
> > + if (ret) {
> > + DRM_ERROR("failed to create device file pp_dpm_dcefclk\n");
> > + return ret;
> > + }
> > ret = device_create_file(adev->dev, &dev_attr_pp_dpm_pcie);
> > if (ret) {
> > DRM_ERROR("failed to create device file
> > pp_dpm_pcie\n"); @@ -2474,6 +2522,7 @@ void
> amdgpu_pm_sysfs_fini(struct amdgpu_device *adev)
> > device_remove_file(adev->dev, &dev_attr_pp_dpm_socclk);
> > device_remove_file(adev->dev, &dev_attr_pp_dpm_pcie);
> > device_remove_file(adev->dev, &dev_attr_pp_dpm_fclk);
> > + device_remove_file(adev->dev, &dev_attr_pp_dpm_dcefclk);
> > device_remove_file(adev->dev, &dev_attr_pp_sclk_od);
> > device_remove_file(adev->dev, &dev_attr_pp_mclk_od);
> > device_remove_file(adev->dev,
> > diff --git a/drivers/gpu/drm/amd/include/kgd_pp_interface.h
> > b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
> > index f82de14f6560..2b579ba9b685 100644
> > --- a/drivers/gpu/drm/amd/include/kgd_pp_interface.h
> > +++ b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
> > @@ -94,6 +94,7 @@ enum pp_clock_type {
> > PP_PCIE,
> > PP_SOCCLK,
> > PP_FCLK,
> > + PP_DCEFCLK,
> > OD_SCLK,
> > OD_MCLK,
> > OD_VDDC_CURVE,
> > diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
> > b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
> > index 1832dcb965b1..585046c24925 100644
> > --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
> > +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
> > @@ -1746,6 +1746,17 @@ static int vega20_upload_dpm_min_level(struct
> pp_hwmgr *hwmgr, uint32_t feature_
> > return ret);
> > }
> >
> > + if (data->smu_features[GNLD_DPM_DCEFCLK].enabled &&
> > + (feature_mask & FEATURE_DPM_DCEFCLK_MASK)) {
> > + min_freq =
> > + data->dpm_table.dcef_table.dpm_state.hard_min_level;
> > +
> > + PP_ASSERT_WITH_CODE(!(ret =
> smum_send_msg_to_smc_with_parameter(
> > + hwmgr, PPSMC_MSG_SetHardMinByFreq,
> > + (PPCLK_DCEFCLK << 16) | (min_freq & 0xffff))),
> > + "Failed to set hard min dcefclk!",
> > + return ret);
> > + }
> > +
> > return ret;
> > }
> >
> > @@ -2258,7 +2269,7 @@ static int vega20_force_clock_level(struct
> pp_hwmgr *hwmgr,
> > enum pp_clock_type type, uint32_t mask) {
> > struct vega20_hwmgr *data = (struct vega20_hwmgr *)(hwmgr-
> >backend);
> > - uint32_t soft_min_level, soft_max_level;
> > + uint32_t soft_min_level, soft_max_level, hard_min_level;
> > int ret = 0;
> >
> > switch (type) {
> > @@ -2373,6 +2384,28 @@ static int vega20_force_clock_level(struct
> > pp_hwmgr *hwmgr,
> >
> > break;
> >
> > + case PP_DCEFCLK:
> > + hard_min_level = mask ? (ffs(mask) - 1) : 0;
> > +
> > + if (hard_min_level >= data->dpm_table.dcef_table.count) {
> > + pr_err("Clock level specified %d is over max allowed %d\n",
> > + hard_min_level,
> > + data->dpm_table.dcef_table.count - 1);
> > + return -EINVAL;
> > + }
> > +
> > + data->dpm_table.dcef_table.dpm_state.hard_min_level =
> > +
> > + data->dpm_table.dcef_table.dpm_levels[hard_min_level].value;
> > +
> > + ret = vega20_upload_dpm_min_level(hwmgr,
> FEATURE_DPM_DCEFCLK_MASK);
> > + PP_ASSERT_WITH_CODE(!ret,
> > + "Failed to upload boot level to lowest!",
> > + return ret);
> > +
> > + //TODO: Setting DCEFCLK max dpm level is not supported
> > +
> > + break;
> > +
> > case PP_PCIE:
> > soft_min_level = mask ? (ffs(mask) - 1) : 0;
> > soft_max_level = mask ? (fls(mask) - 1) : 0; @@
> > -3039,6 +3072,23 @@ static int vega20_print_clock_levels(struct pp_hwmgr
> *hwmgr,
> > fclk_dpm_table->dpm_levels[i].value == (now / 100) ? "*" :
> "");
> > break;
> >
> > + case PP_DCEFCLK:
> > + ret = vega20_get_current_clk_freq(hwmgr, PPCLK_DCEFCLK,
> &now);
> > + PP_ASSERT_WITH_CODE(!ret,
> > + "Attempt to get current dcefclk freq Failed!",
> > + return ret);
> > +
> > + ret = vega20_get_dcefclocks(hwmgr, &clocks);
> > + PP_ASSERT_WITH_CODE(!ret,
> > + "Attempt to get dcefclk levels Failed!",
> > + return ret);
> > +
> > + for (i = 0; i < clocks.num_levels; i++)
> > + 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;
> > +
> > case PP_PCIE:
> > gen_speed = (RREG32_PCIE(smnPCIE_LC_SPEED_CNTL) &
> >
> > PSWUSP0_PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE_MASK)
> > --
> > 2.20.1
> >
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> > amd-gfx at lists.freedesktop.org
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