Commit cee991cb authored by Akash Goel's avatar Akash Goel Committed by Daniel Vetter

drm/i915/skl: Updated the gen6_init_rps_frequencies function

On SKL the frequency is specified in units of 16.66 MHZ, barring the
RP_STATE_CAP(0x5998) register, which still reports frequency in units
of 50 MHZ. So an extra conversion is required in gen6_init_rps_frequencies
function for SKL, to store the frequency values as per the actual hardware unit.

v2: Corrected the conversion from 50 to 16.66 MHZ (Ville)
Signed-off-by: default avatarAkash Goel <akash.goel@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 80b6dda4
...@@ -4181,6 +4181,13 @@ static void gen6_init_rps_frequencies(struct drm_device *dev) ...@@ -4181,6 +4181,13 @@ static void gen6_init_rps_frequencies(struct drm_device *dev)
dev_priv->rps.rp0_freq = (rp_state_cap >> 0) & 0xff; dev_priv->rps.rp0_freq = (rp_state_cap >> 0) & 0xff;
dev_priv->rps.rp1_freq = (rp_state_cap >> 8) & 0xff; dev_priv->rps.rp1_freq = (rp_state_cap >> 8) & 0xff;
dev_priv->rps.min_freq = (rp_state_cap >> 16) & 0xff; dev_priv->rps.min_freq = (rp_state_cap >> 16) & 0xff;
if (IS_SKYLAKE(dev)) {
/* Store the frequency values in 16.66 MHZ units, which is
the natural hardware unit for SKL */
dev_priv->rps.rp0_freq *= GEN9_FREQ_SCALER;
dev_priv->rps.rp1_freq *= GEN9_FREQ_SCALER;
dev_priv->rps.min_freq *= GEN9_FREQ_SCALER;
}
/* hw_max = RP0 until we check for overclocking */ /* hw_max = RP0 until we check for overclocking */
dev_priv->rps.max_freq = dev_priv->rps.rp0_freq; dev_priv->rps.max_freq = dev_priv->rps.rp0_freq;
......
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