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Commit f936ec34 authored by Akash Goel's avatar Akash Goel Committed by Daniel Vetter
Browse files

drm/i915/skl: Updated the i915_ring_freq_table debugfs function 



Updated the i915_ring_freq_table debugfs function to support the read
of ring frequency table, through Punit interface, for SKL also.

Issue: VIZ-5144
Signed-off-by: default avatarAkash Goel <akash.goel@intel.com>
Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 4c8c7743

drivers/gpu/drm/i915/i915_debugfs.c

+15 −4
Original line number Diff line number Diff line
@@ -1782,6 +1782,7 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused) 
	struct drm_i915_private *dev_priv = dev->dev_private;

	int ret = 0;

	int gpu_freq, ia_freq;

	unsigned int max_gpu_freq, min_gpu_freq;



	if (!(IS_GEN6(dev) || IS_GEN7(dev))) {

		seq_puts(m, "unsupported on this chipset\n");
@@ -1796,17 +1797,27 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused) 
	if (ret)

		goto out;



	if (IS_SKYLAKE(dev)) {

		/* Convert GT frequency to 50 HZ units */

		min_gpu_freq =

			dev_priv->rps.min_freq_softlimit / GEN9_FREQ_SCALER;

		max_gpu_freq =

			dev_priv->rps.max_freq_softlimit / GEN9_FREQ_SCALER;

	} else {

		min_gpu_freq = dev_priv->rps.min_freq_softlimit;

		max_gpu_freq = dev_priv->rps.max_freq_softlimit;

	}



	seq_puts(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\tEffective Ring freq (MHz)\n");



	for (gpu_freq = dev_priv->rps.min_freq_softlimit;

	     gpu_freq <= dev_priv->rps.max_freq_softlimit;

	     gpu_freq++) {

	for (gpu_freq = min_gpu_freq; gpu_freq <= max_gpu_freq; gpu_freq++) {

		ia_freq = gpu_freq;

		sandybridge_pcode_read(dev_priv,

				       GEN6_PCODE_READ_MIN_FREQ_TABLE,

				       &ia_freq);

		seq_printf(m, "%d\t\t%d\t\t\t\t%d\n",

			   intel_gpu_freq(dev_priv, gpu_freq),

			   intel_gpu_freq(dev_priv, (gpu_freq *

				(IS_SKYLAKE(dev) ? GEN9_FREQ_SCALER : 1))),

			   ((ia_freq >> 0) & 0xff) * 100,

			   ((ia_freq >> 8) & 0xff) * 100);

	}