drm/i915: Make .get_dplls() return int

Get rid of the confusing back and forth between bools and ints
in the .get_dplls() stuff. Just make everything return an int.

Initial conversion done with cocci, with some manual fixups on top:
@find@
identifier func !~ "get_hw_state|_is_|needed";
typedef bool;
parameter list[N] P;
@@
- bool
+ int
 func(P)
{
<...
(
- return true;
+ return 0;
|
- return false;
+ return -EINVAL;
)
...>
}

@@
identifier find.func;
expression list[find.N] E;
expression X;
@@
- if (!func(E))
+ ret = func(E);
+ if (ret)
  {
  ...
- return X;
+ return ret;
  }

@@
identifier find.func;
expression X;
expression list[find.N] E;
@@
- if (!func(E))
+ ret = func(E);
+ if (ret)
- return X;
+ return ret;

@@
identifier find.func;
expression list[find.N] E;
expression O, X;
typedef bool;
bool B;
@@
- B = func(E);
- if (O && !B)
+ if (O) {
+ ret = func(E);
+ if (ret)
- return X;
+ return ret;
+ }

@@
identifier find.func;
expression list[find.N] E;
expression O, X;
@@
- if (O && !func(E))
+ if (O) {
+ ret = func(E);
+ if (ret)
- return X;
+ return ret;
+ }

@@
identifier find.func;
expression list[find.N] E;
expression X;
typedef bool;
bool B;
@@
- B = func(E);
- if (!B)
+ ret = func(E);
+ if (ret)
  {
  ...
- return X;
+ return ret;
  }
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220325123205.22140-2-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -935,6 +935,7 @@ static int hsw_crtc_compute_clock(struct intel_crtc_state *crtc_state)
 		to_intel_atomic_state(crtc_state->uapi.state);
 	struct intel_encoder *encoder =
 		intel_get_crtc_new_encoder(state, crtc_state);
+	int ret;
 
 	if (IS_DG2(dev_priv))
 		return intel_mpllb_calc_state(crtc_state, encoder);
@@ -943,11 +944,12 @@ static int hsw_crtc_compute_clock(struct intel_crtc_state *crtc_state)
 	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
 		return 0;
 
-	if (!intel_reserve_shared_dplls(state, crtc, encoder)) {
+	ret = intel_reserve_shared_dplls(state, crtc, encoder);
+	if (ret) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "failed to find PLL for pipe %c\n",
 			    pipe_name(crtc->pipe));
-		return -EINVAL;
+		return ret;
 	}
 
 	return 0;
@@ -1076,6 +1078,7 @@ static int ilk_crtc_compute_clock(struct intel_crtc_state *crtc_state)
 		to_intel_atomic_state(crtc_state->uapi.state);
 	const struct intel_limit *limit;
 	int refclk = 120000;
+	int ret;
 
 	memset(&crtc_state->dpll_hw_state, 0,
 	       sizeof(crtc_state->dpll_hw_state));
@@ -1118,11 +1121,12 @@ static int ilk_crtc_compute_clock(struct intel_crtc_state *crtc_state)
 	ilk_compute_dpll(crtc_state, &crtc_state->dpll,
 			 &crtc_state->dpll);
 
-	if (!intel_reserve_shared_dplls(state, crtc, NULL)) {
+	ret = intel_reserve_shared_dplls(state, crtc, NULL);
+	if (ret) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "failed to find PLL for pipe %c\n",
 			    pipe_name(crtc->pipe));
-		return -EINVAL;
+		return ret;
 	}
 
 	return 0;

drivers/gpu/drm/i915/display/intel_dpll_mgr.h

@@ -337,7 +337,7 @@ void assert_shared_dpll(struct drm_i915_private *dev_priv,
 			bool state);
 #define assert_shared_dpll_enabled(d, p) assert_shared_dpll(d, p, true)
 #define assert_shared_dpll_disabled(d, p) assert_shared_dpll(d, p, false)
-bool intel_reserve_shared_dplls(struct intel_atomic_state *state,
+int intel_reserve_shared_dplls(struct intel_atomic_state *state,
 			       struct intel_crtc *crtc,
 			       struct intel_encoder *encoder);
 void intel_release_shared_dplls(struct intel_atomic_state *state,