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tools/power/turbostat: Add support for new i915 sysfs knobs

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On Meteorlake platform, i915 driver supports the traditional graphics
sysfs knobs including
   /sys/class/drm/card0/power/rc6_residency_ms
   /sys/class/drm/card0/gt_cur_freq_mhz
   /sys/class/drm/card0/gt_act_freq_mhz

At the same time, it also supports
   /sys/class/drm/card0/gt/gt0/rc6_residency_ms
   /sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz
   /sys/class/drm/card0/gt/gt0/rps_act_freq_mhz
   /sys/class/drm/card0/gt/gt1/rc6_residency_ms
   /sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz
   /sys/class/drm/card0/gt/gt1/rps_act_freq_mhz
gt0 is for GFX and gt1 is for SA Media.

Enhance turbostat to prefer the i915 new sysfs knobs.
Export gt0 via BIC_GFX_rc6/BIC_GFXMHz/BIC_GFXACTMHz.
Export gt1 via BIC_SMA_mc6/BIC_SMAMHz/BIC_SMAACTMHz.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Zhang Rui 2024-03-22 09:52:24 +08:00 committed by Len Brown
parent 3bbb331c1d
commit dc02dc937a
1 changed files with 24 additions and 0 deletions
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24
tools/power/x86/turbostat/turbostat.c
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@ -5380,6 +5380,29 @@ static void probe_intel_uncore_frequency(void)
static void probe_graphics(void)
{
/* New i915 graphics sysfs knobs */
if (!access("/sys/class/drm/card0/gt/gt0/rc6_residency_ms", R_OK)) {
gfx_info[GFX_rc6].path = "/sys/class/drm/card0/gt/gt0/rc6_residency_ms";
if (!access("/sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz", R_OK))
gfx_info[GFX_MHz].path = "/sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz";
if (!access("/sys/class/drm/card0/gt/gt0/rps_act_freq_mhz", R_OK))
gfx_info[GFX_ACTMHz].path = "/sys/class/drm/card0/gt/gt0/rps_act_freq_mhz";
if (!access("/sys/class/drm/card0/gt/gt1/rc6_residency_ms", R_OK))
gfx_info[SAM_mc6].path = "/sys/class/drm/card0/gt/gt1/rc6_residency_ms";
if (!access("/sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz", R_OK))
gfx_info[SAM_MHz].path = "/sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz";
if (!access("/sys/class/drm/card0/gt/gt1/rps_act_freq_mhz", R_OK))
gfx_info[SAM_ACTMHz].path = "/sys/class/drm/card0/gt/gt1/rps_act_freq_mhz";
goto end;
}
/* Fall back to traditional i915 graphics sysfs knobs */
if (!access("/sys/class/drm/card0/power/rc6_residency_ms", R_OK))
gfx_info[GFX_rc6].path = "/sys/class/drm/card0/power/rc6_residency_ms";
@ -5394,6 +5417,7 @@ static void probe_graphics(void)
else if (!access("/sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz", R_OK))
gfx_info[GFX_ACTMHz].path = "/sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz";
end:
if (gfx_info[GFX_rc6].path)
BIC_PRESENT(BIC_GFX_rc6);
if (gfx_info[GFX_MHz].path)