drm/i915: refactor some crtc code out of intel display. (v2)

There may be more crtc code that can be pulled out, but this
is a good start.

v2: move plane before this.
Signed-off-by: Dave Airlie <airlied@redhat.com>
[Jani: cleaned up intel_crtc.h a bit.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/eacbe964f90d189c5940c12af5e09091b37a19c3.1610622609.git.jani.nikula@intel.com

drivers/gpu/drm/i915/Makefile

@@ -196,6 +196,7 @@ i915-y += \
 	display/intel_color.o \
 	display/intel_combo_phy.o \
 	display/intel_connector.o \
+	display/intel_crtc.o \
 	display/intel_csr.o \
 	display/intel_cursor.o \
 	display/intel_display.o \

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

+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_plane.h>
+#include <drm/drm_plane_helper.h>
+
+#include "intel_atomic.h"
+#include "intel_atomic_plane.h"
+#include "intel_color.h"
+#include "intel_crtc.h"
+#include "intel_cursor.h"
+#include "intel_display_debugfs.h"
+#include "intel_display_types.h"
+#include "intel_pipe_crc.h"
+#include "intel_sprite.h"
+#include "i9xx_plane.h"
+
+static void assert_vblank_disabled(struct drm_crtc *crtc)
+{
+	if (I915_STATE_WARN_ON(drm_crtc_vblank_get(crtc) == 0))
+		drm_crtc_vblank_put(crtc);
+}
+
+u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_vblank_crtc *vblank = &dev->vblank[drm_crtc_index(&crtc->base)];
+
+	if (!vblank->max_vblank_count)
+		return (u32)drm_crtc_accurate_vblank_count(&crtc->base);
+
+	return crtc->base.funcs->get_vblank_counter(&crtc->base);
+}
+
+u32 intel_crtc_max_vblank_count(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	u32 mode_flags = crtc->mode_flags;
+
+	/*
+	 * From Gen 11, In case of dsi cmd mode, frame counter wouldnt
+	 * have updated at the beginning of TE, if we want to use
+	 * the hw counter, then we would find it updated in only
+	 * the next TE, hence switching to sw counter.
+	 */
+	if (mode_flags & (I915_MODE_FLAG_DSI_USE_TE0 | I915_MODE_FLAG_DSI_USE_TE1))
+		return 0;
+
+	/*
+	 * On i965gm the hardware frame counter reads
+	 * zero when the TV encoder is enabled :(
+	 */
+	if (IS_I965GM(dev_priv) &&
+	    (crtc_state->output_types & BIT(INTEL_OUTPUT_TVOUT)))
+		return 0;
+
+	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
+		return 0xffffffff; /* full 32 bit counter */
+	else if (INTEL_GEN(dev_priv) >= 3)
+		return 0xffffff; /* only 24 bits of frame count */
+	else
+		return 0; /* Gen2 doesn't have a hardware frame counter */
+}
+
+void intel_crtc_vblank_on(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	assert_vblank_disabled(&crtc->base);
+	drm_crtc_set_max_vblank_count(&crtc->base,
+				      intel_crtc_max_vblank_count(crtc_state));
+	drm_crtc_vblank_on(&crtc->base);
+}
+
+void intel_crtc_vblank_off(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	drm_crtc_vblank_off(&crtc->base);
+	assert_vblank_disabled(&crtc->base);
+}
+
+struct intel_crtc_state *intel_crtc_state_alloc(struct intel_crtc *crtc)
+{
+	struct intel_crtc_state *crtc_state;
+
+	crtc_state = kmalloc(sizeof(*crtc_state), GFP_KERNEL);
+
+	if (crtc_state)
+		intel_crtc_state_reset(crtc_state, crtc);
+
+	return crtc_state;
+}
+
+void intel_crtc_state_reset(struct intel_crtc_state *crtc_state,
+			    struct intel_crtc *crtc)
+{
+	memset(crtc_state, 0, sizeof(*crtc_state));
+
+	__drm_atomic_helper_crtc_state_reset(&crtc_state->uapi, &crtc->base);
+
+	crtc_state->cpu_transcoder = INVALID_TRANSCODER;
+	crtc_state->master_transcoder = INVALID_TRANSCODER;
+	crtc_state->hsw_workaround_pipe = INVALID_PIPE;
+	crtc_state->output_format = INTEL_OUTPUT_FORMAT_INVALID;
+	crtc_state->scaler_state.scaler_id = -1;
+	crtc_state->mst_master_transcoder = INVALID_TRANSCODER;
+}
+
+static struct intel_crtc *intel_crtc_alloc(void)
+{
+	struct intel_crtc_state *crtc_state;
+	struct intel_crtc *crtc;
+
+	crtc = kzalloc(sizeof(*crtc), GFP_KERNEL);
+	if (!crtc)
+		return ERR_PTR(-ENOMEM);
+
+	crtc_state = intel_crtc_state_alloc(crtc);
+	if (!crtc_state) {
+		kfree(crtc);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	crtc->base.state = &crtc_state->uapi;
+	crtc->config = crtc_state;
+
+	return crtc;
+}
+
+static void intel_crtc_free(struct intel_crtc *crtc)
+{
+	intel_crtc_destroy_state(&crtc->base, crtc->base.state);
+	kfree(crtc);
+}
+
+static void intel_crtc_destroy(struct drm_crtc *crtc)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	drm_crtc_cleanup(crtc);
+	kfree(intel_crtc);
+}
+
+static int intel_crtc_late_register(struct drm_crtc *crtc)
+{
+	intel_crtc_debugfs_add(crtc);
+	return 0;
+}
+
+#define INTEL_CRTC_FUNCS \
+	.set_config = drm_atomic_helper_set_config, \
+	.destroy = intel_crtc_destroy, \
+	.page_flip = drm_atomic_helper_page_flip, \
+	.atomic_duplicate_state = intel_crtc_duplicate_state, \
+	.atomic_destroy_state = intel_crtc_destroy_state, \
+	.set_crc_source = intel_crtc_set_crc_source, \
+	.verify_crc_source = intel_crtc_verify_crc_source, \
+	.get_crc_sources = intel_crtc_get_crc_sources, \
+	.late_register = intel_crtc_late_register
+
+static const struct drm_crtc_funcs bdw_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	.get_vblank_counter = g4x_get_vblank_counter,
+	.enable_vblank = bdw_enable_vblank,
+	.disable_vblank = bdw_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs ilk_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	.get_vblank_counter = g4x_get_vblank_counter,
+	.enable_vblank = ilk_enable_vblank,
+	.disable_vblank = ilk_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs g4x_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	.get_vblank_counter = g4x_get_vblank_counter,
+	.enable_vblank = i965_enable_vblank,
+	.disable_vblank = i965_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i965_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	.get_vblank_counter = i915_get_vblank_counter,
+	.enable_vblank = i965_enable_vblank,
+	.disable_vblank = i965_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i915gm_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	.get_vblank_counter = i915_get_vblank_counter,
+	.enable_vblank = i915gm_enable_vblank,
+	.disable_vblank = i915gm_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i915_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	.get_vblank_counter = i915_get_vblank_counter,
+	.enable_vblank = i8xx_enable_vblank,
+	.disable_vblank = i8xx_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i8xx_crtc_funcs = {
+	INTEL_CRTC_FUNCS,
+
+	/* no hw vblank counter */
+	.enable_vblank = i8xx_enable_vblank,
+	.disable_vblank = i8xx_disable_vblank,
+	.get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	struct intel_plane *primary, *cursor;
+	const struct drm_crtc_funcs *funcs;
+	struct intel_crtc *crtc;
+	int sprite, ret;
+
+	crtc = intel_crtc_alloc();
+	if (IS_ERR(crtc))
+		return PTR_ERR(crtc);
+
+	crtc->pipe = pipe;
+	crtc->num_scalers = RUNTIME_INFO(dev_priv)->num_scalers[pipe];
+
+	primary = intel_primary_plane_create(dev_priv, pipe);
+	if (IS_ERR(primary)) {
+		ret = PTR_ERR(primary);
+		goto fail;
+	}
+	crtc->plane_ids_mask |= BIT(primary->id);
+
+	for_each_sprite(dev_priv, pipe, sprite) {
+		struct intel_plane *plane;
+
+		plane = intel_sprite_plane_create(dev_priv, pipe, sprite);
+		if (IS_ERR(plane)) {
+			ret = PTR_ERR(plane);
+			goto fail;
+		}
+		crtc->plane_ids_mask |= BIT(plane->id);
+	}
+
+	cursor = intel_cursor_plane_create(dev_priv, pipe);
+	if (IS_ERR(cursor)) {
+		ret = PTR_ERR(cursor);
+		goto fail;
+	}
+	crtc->plane_ids_mask |= BIT(cursor->id);
+
+	if (HAS_GMCH(dev_priv)) {
+		if (IS_CHERRYVIEW(dev_priv) ||
+		    IS_VALLEYVIEW(dev_priv) || IS_G4X(dev_priv))
+			funcs = &g4x_crtc_funcs;
+		else if (IS_GEN(dev_priv, 4))
+			funcs = &i965_crtc_funcs;
+		else if (IS_I945GM(dev_priv) || IS_I915GM(dev_priv))
+			funcs = &i915gm_crtc_funcs;
+		else if (IS_GEN(dev_priv, 3))
+			funcs = &i915_crtc_funcs;
+		else
+			funcs = &i8xx_crtc_funcs;
+	} else {
+		if (INTEL_GEN(dev_priv) >= 8)
+			funcs = &bdw_crtc_funcs;
+		else
+			funcs = &ilk_crtc_funcs;
+	}
+
+	ret = drm_crtc_init_with_planes(&dev_priv->drm, &crtc->base,
+					&primary->base, &cursor->base,
+					funcs, "pipe %c", pipe_name(pipe));
+	if (ret)
+		goto fail;
+
+	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->pipe_to_crtc_mapping) ||
+	       dev_priv->pipe_to_crtc_mapping[pipe] != NULL);
+	dev_priv->pipe_to_crtc_mapping[pipe] = crtc;
+
+	if (INTEL_GEN(dev_priv) < 9) {
+		enum i9xx_plane_id i9xx_plane = primary->i9xx_plane;
+
+		BUG_ON(i9xx_plane >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
+		       dev_priv->plane_to_crtc_mapping[i9xx_plane] != NULL);
+		dev_priv->plane_to_crtc_mapping[i9xx_plane] = crtc;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 10)
+		drm_crtc_create_scaling_filter_property(&crtc->base,
+						BIT(DRM_SCALING_FILTER_DEFAULT) |
+						BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR));
+
+	intel_color_init(crtc);
+
+	intel_crtc_crc_init(crtc);
+
+	drm_WARN_ON(&dev_priv->drm, drm_crtc_index(&crtc->base) != crtc->pipe);
+
+	return 0;
+
+fail:
+	intel_crtc_free(crtc);
+
+	return ret;
+}

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

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef _INTEL_CRTC_H_
+#define _INTEL_CRTC_H_
+
+#include <linux/types.h>
+
+enum pipe;
+struct drm_i915_private;
+struct intel_crtc;
+struct intel_crtc_state;
+
+u32 intel_crtc_max_vblank_count(const struct intel_crtc_state *crtc_state);
+int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe);
+struct intel_crtc_state *intel_crtc_state_alloc(struct intel_crtc *crtc);
+void intel_crtc_state_reset(struct intel_crtc_state *crtc_state,
+			    struct intel_crtc *crtc);
+
+#endif