[PATCH v2] drm/amd/powerplay: change sysfs pp_dpm_xxx format for navi10

[Huang, Ray]

> -----Original Message-----
> From: Wang, Kevin(Yang) <Kevin1.Wang at amd.com>
> Sent: Thursday, July 18, 2019 5:43 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Feng, Kenneth <Kenneth.Feng at amd.com>; Quan, Evan
> <Evan.Quan at amd.com>; Huang, Ray <Ray.Huang at amd.com>; Xu, Feifei
> <Feifei.Xu at amd.com>; Wang, Kevin(Yang) <Kevin1.Wang at amd.com>
> Subject: [PATCH v2] drm/amd/powerplay: change sysfs pp_dpm_xxx format
> for navi10
> 
> v2:
> set average clock value on level 1 when current clock equal min or max clock
> (fine grained dpm support).
> 
> the navi10 gfxclk (sclk) support fine grained DPM, so use level 1 to show
> current dpm freq in sysfs pp_dpm_xxx
> 
> Change-Id: I14daa6e30c52c89795708ec06660862bb4591036
> Signed-off-by: Kevin Wang <kevin1.wang at amd.com>

Acked-by: Huang Rui <ray.huang at amd.com>

> ---
>  drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 47 +++++++++++++++++++-
> --
>  1 file changed, 41 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> index 895a4e592d5a..1f721b85c0f6 100644
> --- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> @@ -627,11 +627,26 @@ static int
> navi10_get_current_clk_freq_by_table(struct smu_context *smu,
>  	return ret;
>  }
> 
> +static bool navi10_is_support_fine_grained_dpm(struct smu_context *smu,
> +enum smu_clk_type clk_type) {
> +	PPTable_t *pptable = smu->smu_table.driver_pptable;
> +	DpmDescriptor_t *dpm_desc = NULL;
> +	uint32_t clk_index = 0;
> +
> +	clk_index = smu_clk_get_index(smu, clk_type);
> +	dpm_desc = &pptable->DpmDescriptor[clk_index];
> +
> +	/* 0 - Fine grained DPM, 1 - Discrete DPM */
> +	return dpm_desc->SnapToDiscrete == 0 ? true : false; }
> +
>  static int navi10_print_clk_levels(struct smu_context *smu,
>  			enum smu_clk_type clk_type, char *buf)  {
>  	int i, size = 0, ret = 0;
>  	uint32_t cur_value = 0, value = 0, count = 0;
> +	uint32_t freq_values[3] = {0};
> +	uint32_t mark_index = 0;
> 
>  	switch (clk_type) {
>  	case SMU_GFXCLK:
> @@ -644,22 +659,42 @@ static int navi10_print_clk_levels(struct
> smu_context *smu,
>  		ret = smu_get_current_clk_freq(smu, clk_type, &cur_value);
>  		if (ret)
>  			return size;
> +
>  		/* 10KHz -> MHz */
>  		cur_value = cur_value / 100;
> 
> -		size += sprintf(buf, "current clk: %uMhz\n", cur_value);
> -
>  		ret = smu_get_dpm_level_count(smu, clk_type, &count);
>  		if (ret)
>  			return size;
> 
> -		for (i = 0; i < count; i++) {
> -			ret = smu_get_dpm_freq_by_index(smu, clk_type, i,
> &value);
> +		if (!navi10_is_support_fine_grained_dpm(smu, clk_type)) {
> +			for (i = 0; i < count; i++) {
> +				ret = smu_get_dpm_freq_by_index(smu,
> clk_type, i, &value);
> +				if (ret)
> +					return size;
> +
> +				size += sprintf(buf + size, "%d: %uMhz %s\n",
> i, value,
> +						cur_value == value ? "*" : "");
> +			}
> +		} else {
> +			ret = smu_get_dpm_freq_by_index(smu, clk_type, 0,
> &freq_values[0]);
> +			if (ret)
> +				return size;
> +			ret = smu_get_dpm_freq_by_index(smu, clk_type,
> count - 1,
> +&freq_values[2]);
>  			if (ret)
>  				return size;
> 
> -			size += sprintf(buf + size, "%d: %uMhz %s\n", i, value,
> -					cur_value == value ? "*" : "");
> +			freq_values[1] = cur_value;
> +			mark_index = cur_value == freq_values[0] ? 0 :
> +				     cur_value == freq_values[2] ? 2 : 1;
> +			if (mark_index != 1)
> +				freq_values[1] = (freq_values[0] +
> freq_values[2]) / 2;
> +
> +			for (i = 0; i < 3; i++) {
> +				size += sprintf(buf + size, "%d: %uMhz %s\n",
> i, freq_values[i],
> +						i == mark_index ? "*" : "");
> +			}
> +
>  		}
>  		break;
>  	default:
> --
> 2.22.0