drm/i915: Name the IPS_PCODE_CONTROL bit

Give a name to the bit which tells pcode to control IPS.

v2: Note that IPS_CTL bits apply to DISPLAY_IPS_CONTROL as well (Chris)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170912153411.20171-2-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f9f9fcc..9f03cd0 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7974,6 +7974,8 @@ enum {
 #define   GEN6_PCODE_WRITE_D_COMP              0x11
 #define   HSW_PCODE_DE_WRITE_FREQ_REQ          0x17
 #define   DISPLAY_IPS_CONTROL                  0x19
+            /* See also IPS_CTL */
+#define     IPS_PCODE_CONTROL                  (1 << 30)
 #define   HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL 0x1A
 #define   GEN9_PCODE_SAGV_CONTROL              0x21
 #define     GEN9_SAGV_DISABLE                  0x0

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index dbe7d86..c4d8bb7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4956,7 +4956,8 @@ void hsw_enable_ips(struct intel_crtc *crtc)
        assert_plane_enabled(dev_priv, crtc->plane);
        if (IS_BROADWELL(dev_priv)) {
                mutex_lock(&dev_priv->rps.hw_lock);
-               WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0xc0000000));
+               WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL,
+                                               IPS_ENABLE | IPS_PCODE_CONTROL));
                mutex_unlock(&dev_priv->rps.hw_lock);
                /* Quoting Art Runyan: "its not safe to expect any particular
                 * value in IPS_CTL bit 31 after enabling IPS through the