drm/i915: constify the dpll clock vtable

Most the dpll vtable into read-only memory.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0414a27317de3f335a8453a29486b746aa6862e7.1632869550.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 146281b..9c72f1c 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6833,10 +6833,10 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
                crtc_state->update_wm_post = true;
 
        if (mode_changed && crtc_state->hw.enable &&
-           dev_priv->dpll_funcs.crtc_compute_clock &&
+           dev_priv->dpll_funcs &&
            !crtc_state->bigjoiner_slave &&
            !drm_WARN_ON(&dev_priv->drm, crtc_state->shared_dpll)) {
-               ret = dev_priv->dpll_funcs.crtc_compute_clock(crtc_state);
+               ret = dev_priv->dpll_funcs->crtc_compute_clock(crtc_state);
                if (ret)
                        return ret;
        }
@@ -8863,7 +8863,7 @@ static void intel_modeset_clear_plls(struct intel_atomic_state *state)
        struct intel_crtc *crtc;
        int i;
 
-       if (!dev_priv->dpll_funcs.crtc_compute_clock)
+       if (!dev_priv->dpll_funcs)
                return;
 
        for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {

diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c b/drivers/gpu/drm/i915/display/intel_dpll.c
index 7811f19..784e3ee 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dpll.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll.c
@@ -1365,25 +1365,57 @@ static int i8xx_crtc_compute_clock(struct intel_crtc_state *crtc_state)
        return 0;
 }
 
+static const struct intel_dpll_funcs hsw_dpll_funcs = {
+       .crtc_compute_clock = hsw_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs ilk_dpll_funcs = {
+       .crtc_compute_clock = ilk_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs chv_dpll_funcs = {
+       .crtc_compute_clock = chv_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs vlv_dpll_funcs = {
+       .crtc_compute_clock = vlv_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs g4x_dpll_funcs = {
+       .crtc_compute_clock = g4x_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs pnv_dpll_funcs = {
+       .crtc_compute_clock = pnv_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs i9xx_dpll_funcs = {
+       .crtc_compute_clock = i9xx_crtc_compute_clock,
+};
+
+static const struct intel_dpll_funcs i8xx_dpll_funcs = {
+       .crtc_compute_clock = i8xx_crtc_compute_clock,
+};
+
 void
 intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv)
 {
        if (DISPLAY_VER(dev_priv) >= 9 || HAS_DDI(dev_priv))
-               dev_priv->dpll_funcs.crtc_compute_clock = hsw_crtc_compute_clock;
+               dev_priv->dpll_funcs = &hsw_dpll_funcs;
        else if (HAS_PCH_SPLIT(dev_priv))
-               dev_priv->dpll_funcs.crtc_compute_clock = ilk_crtc_compute_clock;
+               dev_priv->dpll_funcs = &ilk_dpll_funcs;
        else if (IS_CHERRYVIEW(dev_priv))
-               dev_priv->dpll_funcs.crtc_compute_clock = chv_crtc_compute_clock;
+               dev_priv->dpll_funcs = &chv_dpll_funcs;
        else if (IS_VALLEYVIEW(dev_priv))
-               dev_priv->dpll_funcs.crtc_compute_clock = vlv_crtc_compute_clock;
+               dev_priv->dpll_funcs = &vlv_dpll_funcs;
        else if (IS_G4X(dev_priv))
-               dev_priv->dpll_funcs.crtc_compute_clock = g4x_crtc_compute_clock;
+               dev_priv->dpll_funcs = &g4x_dpll_funcs;
        else if (IS_PINEVIEW(dev_priv))
-               dev_priv->dpll_funcs.crtc_compute_clock = pnv_crtc_compute_clock;
+               dev_priv->dpll_funcs = &pnv_dpll_funcs;
        else if (DISPLAY_VER(dev_priv) != 2)
-               dev_priv->dpll_funcs.crtc_compute_clock = i9xx_crtc_compute_clock;
+               dev_priv->dpll_funcs = &i9xx_dpll_funcs;
        else
-               dev_priv->dpll_funcs.crtc_compute_clock = i8xx_crtc_compute_clock;
+               dev_priv->dpll_funcs = &i8xx_dpll_funcs;
 }
 
 static bool i9xx_has_pps(struct drm_i915_private *dev_priv)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c3ec527..cb72e2f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -994,7 +994,7 @@ struct drm_i915_private {
        const struct intel_fdi_funcs *fdi_funcs;
 
        /* display pll funcs */
-       struct intel_dpll_funcs dpll_funcs;
+       const struct intel_dpll_funcs *dpll_funcs;
 
        /* Display functions */
        struct drm_i915_display_funcs display;