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authorBen Widawsky <ben@bwidawsk.net>2012-09-26 10:34:00 -0700
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-10-16 09:23:26 +0200
commit42c0526c930523425ff6edc95b7235ce7ab9308d (patch)
treea294d2d4d1f7e31d78916b466e5bb76a72c763d1 /drivers/gpu/drm/i915/i915_debugfs.c
parent39bc66c9371fa6cdb1029e6c1768824f068be913 (diff)
drm/i915: Extract PCU communication
There is a special mechanism for communicating with the PCU already being used for the ring frequency stuff. As we'll be needing this for other commands, extract it now to make future code less error prone and the current code more reusable. I'm not entirely sure if this code matches 1:1 with the previous code behaviorally. Functionally however, it should be the same. CC: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> [danvet: Fixup compile fail reported by Wu Fengguang.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
-rw-r--r--drivers/gpu/drm/i915/i915_debugfs.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 7a4b3f3aad3..66475855c0e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1283,15 +1283,10 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
for (gpu_freq = dev_priv->rps.min_delay;
gpu_freq <= dev_priv->rps.max_delay;
gpu_freq++) {
- I915_WRITE(GEN6_PCODE_DATA, gpu_freq);
- I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY |
- GEN6_PCODE_READ_MIN_FREQ_TABLE);
- if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) &
- GEN6_PCODE_READY) == 0, 10)) {
- DRM_ERROR("pcode read of freq table timed out\n");
- continue;
- }
- ia_freq = I915_READ(GEN6_PCODE_DATA);
+ ia_freq = gpu_freq;
+ sandybridge_pcode_read(dev_priv,
+ GEN6_PCODE_READ_MIN_FREQ_TABLE,
+ &ia_freq);
seq_printf(m, "%d\t\t%d\n", gpu_freq * GT_FREQUENCY_MULTIPLIER, ia_freq * 100);
}