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drm/i915: fix i915_frequency_info on BDW 

The GEN6_PM* registers don't exist on BDW anymore, so when we read
this file we trigger unclaimed register errors. The equivalent BDW
register for PMs is GEN8_GT_I*R(2), so use it.

Testcase: igt/pm_rpm/debugfs-read
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2014-08-01 18:14:48 -03:00 committed by Daniel Vetter
parent 48404c1e53
commit 9dd3c605a3
1 changed files with 15 additions and 5 deletions
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20
drivers/gpu/drm/i915/i915_debugfs.c
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@ -1030,6 +1030,7 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
u32 rpstat, cagf, reqf;
u32 rpupei, rpcurup, rpprevup;
u32 rpdownei, rpcurdown, rpprevdown;
u32 pm_ier, pm_imr, pm_isr, pm_iir, pm_mask;
int max_freq;
/* RPSTAT1 is in the GT power well */
@ -1067,12 +1068,21 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
mutex_unlock(&dev->struct_mutex);
if (IS_GEN6(dev) || IS_GEN7(dev)) {
pm_ier = I915_READ(GEN6_PMIER);
pm_imr = I915_READ(GEN6_PMIMR);
pm_isr = I915_READ(GEN6_PMISR);
pm_iir = I915_READ(GEN6_PMIIR);
pm_mask = I915_READ(GEN6_PMINTRMSK);
} else {
pm_ier = I915_READ(GEN8_GT_IER(2));
pm_imr = I915_READ(GEN8_GT_IMR(2));
pm_isr = I915_READ(GEN8_GT_ISR(2));
pm_iir = I915_READ(GEN8_GT_IIR(2));
pm_mask = I915_READ(GEN6_PMINTRMSK);
}
seq_printf(m, "PM IER=0x%08x IMR=0x%08x ISR=0x%08x IIR=0x%08x, MASK=0x%08x\n",
I915_READ(GEN6_PMIER),
I915_READ(GEN6_PMIMR),
I915_READ(GEN6_PMISR),
I915_READ(GEN6_PMIIR),
I915_READ(GEN6_PMINTRMSK));
pm_ier, pm_imr, pm_isr, pm_iir, pm_mask);
seq_printf(m, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status);
seq_printf(m, "Render p-state ratio: %d\n",
(gt_perf_status & 0xff00) >> 8);