From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Currently we assume that hrawclk is 200MHz on VLV/CHV. That should
be true always, but just to avoid such asumptions we can read out the
actual frequency from CCK.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_display.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 487224572022..5806df01997f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -785,6 +785,7 @@ enum skl_disp_power_wells {
#define DSI_PLL_M1_DIV_MASK (0x1ff << 0)
#define CCK_CZ_CLOCK_CONTROL 0x62
#define CCK_DISPLAY_CLOCK_CONTROL 0x6b
+#define CCK_DISPLAY_REF_CLOCK_CONTROL 0x6c
#define CCK_TRUNK_FORCE_ON (1 << 17)
#define CCK_TRUNK_FORCE_OFF (1 << 16)
#define CCK_FREQUENCY_STATUS (0x1f << 8)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 84a1359ecba5..09aa5361d994 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -177,7 +177,8 @@ intel_pch_rawclk(struct drm_i915_private *dev_priv)
static int
intel_vlv_hrawclk(struct drm_i915_private *dev_priv)
{
- return 200000;
+ return vlv_get_cck_clock_hpll(dev_priv, "hrawclk",
+ CCK_DISPLAY_REF_CLOCK_CONTROL);
}
static int
--
2.4.10
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