drm/i915: add display sub-struct to drm_i915_private

In another long-overdue cleanup, add a display sub-struct to
drm_i915_private, and start moving display related members there. Start
with display funcs that need a rename anyway to not collide with the new
display member.

Add a new header under display/ for defining struct intel_display.

Rename struct drm_i915_display_funcs to intel_display_funcs while at it.

v2:
- Fix multi-line comment style (Arun)
- Use display as the member name

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d44cae096b664f7015f8c797d6dfd4964226d4f8.1661346845.git.jani.nikula@intel.com

4 files changed, 56 insertions, 16 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index b9d0be7753a8..80ec15c2790a 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -4145,7 +4145,7 @@ bool intel_crtc_get_pipe_config(struct intel_crtc_state *crtc_state)
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 
-	if (!i915->display->get_pipe_config(crtc, crtc_state))
+	if (!i915->display.funcs.display->get_pipe_config(crtc, crtc_state))
 		return false;
 
 	crtc_state->hw.active = true;
@@ -7120,7 +7120,7 @@ static void intel_enable_crtc(struct intel_atomic_state *state,
 
 	intel_crtc_update_active_timings(new_crtc_state);
 
-	dev_priv->display->crtc_enable(state, crtc);
+	dev_priv->display.funcs.display->crtc_enable(state, crtc);
 
 	if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
 		return;
@@ -7199,7 +7199,7 @@ static void intel_old_crtc_state_disables(struct intel_atomic_state *state,
 	 */
 	intel_crtc_disable_pipe_crc(crtc);
 
-	dev_priv->display->crtc_disable(state, crtc);
+	dev_priv->display.funcs.display->crtc_disable(state, crtc);
 	crtc->active = false;
 	intel_fbc_disable(crtc);
 	intel_disable_shared_dpll(old_crtc_state);
@@ -7587,7 +7587,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 	}
 
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
-	dev_priv->display->commit_modeset_enables(state);
+	dev_priv->display.funcs.display->commit_modeset_enables(state);
 
 	intel_encoders_update_complete(state);
 
@@ -8318,7 +8318,7 @@ static const struct drm_mode_config_funcs intel_mode_funcs = {
 	.atomic_state_free = intel_atomic_state_free,
 };
 
-static const struct drm_i915_display_funcs skl_display_funcs = {
+static const struct intel_display_funcs skl_display_funcs = {
 	.get_pipe_config = hsw_get_pipe_config,
 	.crtc_enable = hsw_crtc_enable,
 	.crtc_disable = hsw_crtc_disable,
@@ -8326,7 +8326,7 @@ static const struct drm_i915_display_funcs skl_display_funcs = {
 	.get_initial_plane_config = skl_get_initial_plane_config,
 };
 
-static const struct drm_i915_display_funcs ddi_display_funcs = {
+static const struct intel_display_funcs ddi_display_funcs = {
 	.get_pipe_config = hsw_get_pipe_config,
 	.crtc_enable = hsw_crtc_enable,
 	.crtc_disable = hsw_crtc_disable,
@@ -8334,7 +8334,7 @@ static const struct drm_i915_display_funcs ddi_display_funcs = {
 	.get_initial_plane_config = i9xx_get_initial_plane_config,
 };
 
-static const struct drm_i915_display_funcs pch_split_display_funcs = {
+static const struct intel_display_funcs pch_split_display_funcs = {
 	.get_pipe_config = ilk_get_pipe_config,
 	.crtc_enable = ilk_crtc_enable,
 	.crtc_disable = ilk_crtc_disable,
@@ -8342,7 +8342,7 @@ static const struct drm_i915_display_funcs pch_split_display_funcs = {
 	.get_initial_plane_config = i9xx_get_initial_plane_config,
 };
 
-static const struct drm_i915_display_funcs vlv_display_funcs = {
+static const struct intel_display_funcs vlv_display_funcs = {
 	.get_pipe_config = i9xx_get_pipe_config,
 	.crtc_enable = valleyview_crtc_enable,
 	.crtc_disable = i9xx_crtc_disable,
@@ -8350,7 +8350,7 @@ static const struct drm_i915_display_funcs vlv_display_funcs = {
 	.get_initial_plane_config = i9xx_get_initial_plane_config,
 };
 
-static const struct drm_i915_display_funcs i9xx_display_funcs = {
+static const struct intel_display_funcs i9xx_display_funcs = {
 	.get_pipe_config = i9xx_get_pipe_config,
 	.crtc_enable = i9xx_crtc_enable,
 	.crtc_disable = i9xx_crtc_disable,
@@ -8373,16 +8373,16 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
 	intel_dpll_init_clock_hook(dev_priv);
 
 	if (DISPLAY_VER(dev_priv) >= 9) {
-		dev_priv->display = &skl_display_funcs;
+		dev_priv->display.funcs.display = &skl_display_funcs;
 	} else if (HAS_DDI(dev_priv)) {
-		dev_priv->display = &ddi_display_funcs;
+		dev_priv->display.funcs.display = &ddi_display_funcs;
 	} else if (HAS_PCH_SPLIT(dev_priv)) {
-		dev_priv->display = &pch_split_display_funcs;
+		dev_priv->display.funcs.display = &pch_split_display_funcs;
 	} else if (IS_CHERRYVIEW(dev_priv) ||
 		   IS_VALLEYVIEW(dev_priv)) {
-		dev_priv->display = &vlv_display_funcs;
+		dev_priv->display.funcs.display = &vlv_display_funcs;
 	} else {
-		dev_priv->display = &i9xx_display_funcs;
+		dev_priv->display.funcs.display = &i9xx_display_funcs;
 	}
 
 	intel_fdi_init_hook(dev_priv);
diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gpu/drm/i915/display/intel_display_core.h
new file mode 100644
index 000000000000..c326d5381de7
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display_core.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __INTEL_DISPLAY_CORE_H__
+#define __INTEL_DISPLAY_CORE_H__
+
+#include <linux/types.h>
+
+struct intel_atomic_state;
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_initial_plane_config;
+
+struct intel_display_funcs {
+	/*
+	 * Returns the active state of the crtc, and if the crtc is active,
+	 * fills out the pipe-config with the hw state.
+	 */
+	bool (*get_pipe_config)(struct intel_crtc *,
+				struct intel_crtc_state *);
+	void (*get_initial_plane_config)(struct intel_crtc *,
+					 struct intel_initial_plane_config *);
+	void (*crtc_enable)(struct intel_atomic_state *state,
+			    struct intel_crtc *crtc);
+	void (*crtc_disable)(struct intel_atomic_state *state,
+			     struct intel_crtc *crtc);
+	void (*commit_modeset_enables)(struct intel_atomic_state *state);
+};
+
+struct intel_display {
+	/* Display functions */
+	struct {
+		/* Top level crtc-ish functions */
+		const struct intel_display_funcs *display;
+	} funcs;
+};
+
+#endif /* __INTEL_DISPLAY_CORE_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_modeset_setup.c b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
index f0e04d3904c6..4b30e8228a5e 100644
--- a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
+++ b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
@@ -70,7 +70,7 @@ static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
 
 	drm_WARN_ON(&i915->drm, IS_ERR(temp_crtc_state) || ret);
 
-	i915->display->crtc_disable(to_intel_atomic_state(state), crtc);
+	i915->display.funcs.display->crtc_disable(to_intel_atomic_state(state), crtc);
 
 	drm_atomic_state_put(state);
 
diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c
index d10f27d0b7b0..76be796df255 100644
--- a/drivers/gpu/drm/i915/display/intel_plane_initial.c
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
@@ -311,7 +311,7 @@ void intel_crtc_initial_plane_config(struct intel_crtc *crtc)
 	 * can even allow for smooth boot transitions if the BIOS
 	 * fb is large enough for the active pipe configuration.
 	 */
-	dev_priv->display->get_initial_plane_config(crtc, &plane_config);
+	dev_priv->display.funcs.display->get_initial_plane_config(crtc, &plane_config);
 
 	/*
 	 * If the fb is shared between multiple heads, we'll