drm/i915/de: Introduce intel_de_wait_us()

Introduce intel_de_wait_us() as the microsecond based
counterpart to the millisecond based intel_de_wait_ms().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251110172756.2132-5-ville.syrjala@linux.intel.com
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_de.h b/drivers/gpu/drm/i915/display/intel_de.h
index d449180d1d2244fe5dfbcb23e8dcd667538681c1..43a4160f760a44224071adb667693687a55c9a2c 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_de.h
+++ b/drivers/gpu/drm/i915/display/intel_de.h
@@ -114,6 +114,23 @@ __intel_de_wait_for_register_atomic_nowl(struct intel_display *display,
                                         value, fast_timeout_us, 0, NULL);
 }
 
+static inline int
+intel_de_wait_us(struct intel_display *display, i915_reg_t reg,
+                u32 mask, u32 value, unsigned int timeout_us,
+                u32 *out_value)
+{
+       int ret;
+
+       intel_dmc_wl_get(display, reg);
+
+       ret = __intel_wait_for_register(__to_uncore(display), reg, mask,
+                                       value, timeout_us, 0, out_value);
+
+       intel_dmc_wl_put(display, reg);
+
+       return ret;
+}
+
 static inline int
 intel_de_wait_ms(struct intel_display *display, i915_reg_t reg,
                 u32 mask, u32 value, unsigned int timeout_ms,