drm/i915/display: Apply workarounds during display init

Rather than applying display workarounds as part of
intel_clock_gating_init() (which in turn is confusingly called from
i915_gem_init during device probe), handle them at the point we're
actually initializing the display hardware.  This will also ensure that
these workarounds are properly applied during display initialization on
the Xe driver, which re-uses i915's display code, but does not call
i915's gem init.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230906234732.3728630-10-matthew.d.roper@intel.com

drivers/gpu/drm/i915/display/intel_display_driver.c

@@ -31,6 +31,7 @@
 #include "intel_display_irq.h"
 #include "intel_display_power.h"
 #include "intel_display_types.h"
+#include "intel_display_wa.h"
 #include "intel_dkl_phy.h"
 #include "intel_dmc.h"
 #include "intel_dp.h"
@@ -88,6 +89,8 @@ void intel_display_driver_init_hw(struct drm_i915_private *i915)
 	intel_update_cdclk(i915);
 	intel_cdclk_dump_config(i915, &i915->display.cdclk.hw, "Current CDCLK");
 	cdclk_state->logical = cdclk_state->actual = i915->display.cdclk.hw;
+
+	intel_display_wa_apply(i915);
 }
 
 static const struct drm_mode_config_funcs intel_mode_funcs = {

drivers/gpu/drm/i915/intel_clock_gating.c

@@ -28,7 +28,6 @@
 #include "display/intel_de.h"
 #include "display/intel_display.h"
 #include "display/intel_display_trace.h"
-#include "display/intel_display_wa.h"
 #include "display/skl_watermark.h"
 
 #include "gt/intel_engine_regs.h"
@@ -758,8 +757,6 @@ static void i830_init_clock_gating(struct drm_i915_private *i915)
 void intel_clock_gating_init(struct drm_i915_private *i915)
 {
 	i915->clock_gating_funcs->init_clock_gating(i915);
-
-	intel_display_wa_apply(i915);
 }
 
 static void nop_init_clock_gating(struct drm_i915_private *i915)