[PATCH] drm/amdgpu/powerplay: provide the interface to disable uclk switch for DAL
Kevin Wang
kevwa at amd.com
Tue Jul 30 05:23:24 UTC 2019
On 7/30/19 12:09 PM, Kenneth Feng wrote:
> provide the interface for DAL to disable uclk switch on navi10.
> in this case, the uclk will be fixed to maximum.
> this is a workaround when display configuration causes underflow issue.
>
> Signed-off-by: Kenneth Feng <kenneth.feng at amd.com>
> ---
> .../drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c | 17 +++++++++++++++
> drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h | 5 +++++
> drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 25 ++++++++++++++++++++++
> drivers/gpu/drm/amd/powerplay/smu_v11_0.c | 7 ++++++
> 4 files changed, 54 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
> index 7bc7abc..5b4323b 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
> @@ -802,6 +802,22 @@ enum pp_smu_status pp_nv_set_hard_min_uclk_by_freq(struct pp_smu *pp, int mhz)
> return PP_SMU_RESULT_OK;
> }
>
> +enum pp_smu_status pp_nv_set_pstate_handshake_support(struct pp_smu *pp,
> + BOOLEAN pstate_handshake_supported)
[kevin]:
please take care of code format.
> +{
> + const struct dc_context *ctx = pp->dm;
> + struct amdgpu_device *adev = ctx->driver_context;
> + struct smu_context *smu = &adev->smu;
> +
> + if (!smu->ppt_funcs)
> + return PP_SMU_RESULT_UNSUPPORTED;
> +
> + if (smu_display_disable_memory_clock_switch(smu, !pstate_handshake_supported))
> + return PP_SMU_RESULT_FAIL;
> +
> + return PP_SMU_RESULT_OK;
> +}
> +
> enum pp_smu_status pp_nv_set_voltage_by_freq(struct pp_smu *pp,
> enum pp_smu_nv_clock_id clock_id, int mhz)
> {
> @@ -917,6 +933,7 @@ void dm_pp_get_funcs(
> funcs->nv_funcs.get_maximum_sustainable_clocks = pp_nv_get_maximum_sustainable_clocks;
> /*todo compare data with window driver */
> funcs->nv_funcs.get_uclk_dpm_states = pp_nv_get_uclk_dpm_states;
> + funcs->nv_funcs.set_pstate_handshake_support = pp_nv_set_pstate_handshake_support;
> break;
> #endif
> default:
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
> index 33d2d75..642a1b1 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
> @@ -549,6 +549,8 @@ struct smu_context
> #define WATERMARKS_EXIST (1 << 0)
> #define WATERMARKS_LOADED (1 << 1)
> uint32_t watermarks_bitmap;
> + uint32_t hard_min_uclk_req_from_dal;
> + bool disable_uclk_switch;
>
> uint32_t workload_mask;
> uint32_t workload_prority[WORKLOAD_POLICY_MAX];
> @@ -632,6 +634,7 @@ struct pptable_funcs {
> int (*get_uclk_dpm_states)(struct smu_context *smu, uint32_t *clocks_in_khz, uint32_t *num_states);
> int (*set_default_od_settings)(struct smu_context *smu, bool initialize);
> int (*set_performance_level)(struct smu_context *smu, enum amd_dpm_forced_level level);
> + int (*display_disable_memory_clock_switch)(struct smu_context *smu, bool disable_memory_clock_switch);
> };
>
> struct smu_funcs
> @@ -884,6 +887,8 @@ struct smu_funcs
> ((smu)->ppt_funcs->get_clock_by_type_with_voltage ? (smu)->ppt_funcs->get_clock_by_type_with_voltage((smu), (type), (clocks)) : 0)
> #define smu_display_clock_voltage_request(smu, clock_req) \
> ((smu)->funcs->display_clock_voltage_request ? (smu)->funcs->display_clock_voltage_request((smu), (clock_req)) : 0)
> +#define smu_display_disable_memory_clock_switch(smu, disable_memory_clock_switch) \
> + ((smu)->ppt_funcs->display_disable_memory_clock_switch ? (smu)->ppt_funcs->display_disable_memory_clock_switch((smu), (disable_memory_clock_switch)) : 0)
[kevin]:
could you replace 0 with -EINVAL as default return value. if so, you can
call this function directly, and not check "!smu->ppt_funct".
> #define smu_get_dal_power_level(smu, clocks) \
> ((smu)->funcs->get_dal_power_level ? (smu)->funcs->get_dal_power_level((smu), (clocks)) : 0)
> #define smu_get_perf_level(smu, designation, level) \
> diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> index c873228..a8c98c4 100644
> --- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> @@ -1655,6 +1655,30 @@ static int navi10_get_thermal_temperature_range(struct smu_context *smu,
> return 0;
> }
>
> +static int navi10_display_disable_memory_clock_switch(struct smu_context *smu,
> + bool disable_memory_clock_switch)
> +{
> + int ret = 0;
> + struct smu_11_0_max_sustainable_clocks *max_sustainable_clocks =
> + (struct smu_11_0_max_sustainable_clocks *)
> + smu->smu_table.max_sustainable_clocks;
> + uint32_t min_memory_clock = smu->hard_min_uclk_req_from_dal;
> + uint32_t max_memory_clock = max_sustainable_clocks->uclock;
> +
> + if(smu->disable_uclk_switch == disable_memory_clock_switch)
> + return 0;
> +
> + if(disable_memory_clock_switch)
> + ret = smu_set_hard_freq_range(smu, SMU_UCLK, max_memory_clock, 0);
> + else
> + ret = smu_set_hard_freq_range(smu, SMU_UCLK, min_memory_clock, 0);
> +
> + if(!ret)
> + smu->disable_uclk_switch = disable_memory_clock_switch;
> +
> + return ret;
> +}
> +
> static const struct pptable_funcs navi10_ppt_funcs = {
> .tables_init = navi10_tables_init,
> .alloc_dpm_context = navi10_allocate_dpm_context,
> @@ -1693,6 +1717,7 @@ static const struct pptable_funcs navi10_ppt_funcs = {
> .set_ppfeature_status = navi10_set_ppfeature_status,
> .set_performance_level = navi10_set_performance_level,
> .get_thermal_temperature_range = navi10_get_thermal_temperature_range,
> + .display_disable_memory_clock_switch = navi10_display_disable_memory_clock_switch,
> };
>
> void navi10_set_ppt_funcs(struct smu_context *smu)
> diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> index 745b35a..202b9d6 100644
> --- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> +++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> @@ -1346,16 +1346,23 @@ smu_v11_0_display_clock_voltage_request(struct smu_context *smu,
> if (ret)
> goto failed;
>
> + if (clk_select == SMU_UCLK && smu->disable_uclk_switch)
> + return 0;
> +
> clk_id = smu_clk_get_index(smu, clk_select);
> if (clk_id < 0) {
> ret = -EINVAL;
> goto failed;
> }
>
> +
> mutex_lock(&smu->mutex);
> ret = smu_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinByFreq,
> (clk_id << 16) | clk_freq);
> mutex_unlock(&smu->mutex);
> +
> + if(clk_select == SMU_UCLK)
> + smu->hard_min_uclk_req_from_dal = clk_freq;
> }
>
> failed:
More information about the amd-gfx
mailing list