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drm/i915/chv: Add CHV HW status to SSEU status

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Collect the currently enabled counts of slice, subslice, and
execution units using the power gate control ack message
registers specific to Cherryview.

Slice/subslice/EU info and hardware status can now be
determined for CHV, so allow the debugfs SSEU status dump
to proceed for CHV devices.

Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jeff McGee 2015-02-27 10:22:32 -08:00 committed by Daniel Vetter
parent c93043ae1d
commit 5575f03a60
2 changed files with 40 additions and 2 deletions
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31
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -4459,7 +4459,7 @@ static int i915_sseu_status(struct seq_file *m, void *unused)
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned int s_tot = 0, ss_tot = 0, ss_per = 0, eu_tot = 0, eu_per = 0;
if (INTEL_INFO(dev)->gen < 9)
if ((INTEL_INFO(dev)->gen < 8) || IS_BROADWELL(dev))
return -ENODEV;
seq_puts(m, "SSEU Device Info\n");
@ -4481,7 +4481,34 @@ static int i915_sseu_status(struct seq_file *m, void *unused)
yesno(INTEL_INFO(dev)->has_eu_pg));
seq_puts(m, "SSEU Device Status\n");
if (IS_SKYLAKE(dev)) {
if (IS_CHERRYVIEW(dev)) {
const int ss_max = 2;
int ss;
u32 sig1[ss_max], sig2[ss_max];
sig1[0] = I915_READ(CHV_POWER_SS0_SIG1);
sig1[1] = I915_READ(CHV_POWER_SS1_SIG1);
sig2[0] = I915_READ(CHV_POWER_SS0_SIG2);
sig2[1] = I915_READ(CHV_POWER_SS1_SIG2);
for (ss = 0; ss < ss_max; ss++) {
unsigned int eu_cnt;
if (sig1[ss] & CHV_SS_PG_ENABLE)
/* skip disabled subslice */
continue;
s_tot = 1;
ss_per++;
eu_cnt = ((sig1[ss] & CHV_EU08_PG_ENABLE) ? 0 : 2) +
((sig1[ss] & CHV_EU19_PG_ENABLE) ? 0 : 2) +
((sig1[ss] & CHV_EU210_PG_ENABLE) ? 0 : 2) +
((sig2[ss] & CHV_EU311_PG_ENABLE) ? 0 : 2);
eu_tot += eu_cnt;
eu_per = max(eu_per, eu_cnt);
}
ss_tot = ss_per;
} else if (IS_SKYLAKE(dev)) {
const int s_max = 3, ss_max = 4;
int s, ss;
u32 s_reg[s_max], eu_reg[2*s_max], eu_mask[2];

11
drivers/gpu/drm/i915/i915_reg.h
View File

@ -6226,6 +6226,17 @@ enum skl_disp_power_wells {
#define GEN6_RC6 3
#define GEN6_RC7 4
#define CHV_POWER_SS0_SIG1 0xa720
#define CHV_POWER_SS1_SIG1 0xa728
#define CHV_SS_PG_ENABLE (1<<1)
#define CHV_EU08_PG_ENABLE (1<<9)
#define CHV_EU19_PG_ENABLE (1<<17)
#define CHV_EU210_PG_ENABLE (1<<25)
#define CHV_POWER_SS0_SIG2 0xa724
#define CHV_POWER_SS1_SIG2 0xa72c
#define CHV_EU311_PG_ENABLE (1<<1)
#define GEN9_SLICE0_PGCTL_ACK 0x804c
#define GEN9_SLICE1_PGCTL_ACK 0x8050
#define GEN9_SLICE2_PGCTL_ACK 0x8054