drm/i915/display: refactor initial plane config to a separate file

This moves this functionality out of intel_display.c to separate
self-contained file.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211012043502.1377715-5-airlied@gmail.com

4 files changed, 301 insertions, 276 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 39a7b24135c9..b0684537f987 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -95,6 +95,7 @@
 #include "intel_overlay.h"
 #include "intel_panel.h"
 #include "intel_pipe_crc.h"
+#include "intel_plane_initial.h"
 #include "intel_pm.h"
 #include "intel_pps.h"
 #include "intel_psr.h"
@@ -1238,123 +1239,6 @@ u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
 				 DRM_MODE_ROTATE_0);
 }
 
-static struct i915_vma *
-initial_plane_vma(struct drm_i915_private *i915,
-		  struct intel_initial_plane_config *plane_config)
-{
-	struct drm_i915_gem_object *obj;
-	struct i915_vma *vma;
-	u32 base, size;
-
-	if (plane_config->size == 0)
-		return NULL;
-
-	base = round_down(plane_config->base,
-			  I915_GTT_MIN_ALIGNMENT);
-	size = round_up(plane_config->base + plane_config->size,
-			I915_GTT_MIN_ALIGNMENT);
-	size -= base;
-
-	/*
-	 * If the FB is too big, just don't use it since fbdev is not very
-	 * important and we should probably use that space with FBC or other
-	 * features.
-	 */
-	if (IS_ENABLED(CONFIG_FRAMEBUFFER_CONSOLE) &&
-	    size * 2 > i915->stolen_usable_size)
-		return NULL;
-
-	obj = i915_gem_object_create_stolen_for_preallocated(i915, base, size);
-	if (IS_ERR(obj))
-		return NULL;
-
-	/*
-	 * Mark it WT ahead of time to avoid changing the
-	 * cache_level during fbdev initialization. The
-	 * unbind there would get stuck waiting for rcu.
-	 */
-	i915_gem_object_set_cache_coherency(obj, HAS_WT(i915) ?
-					    I915_CACHE_WT : I915_CACHE_NONE);
-
-	switch (plane_config->tiling) {
-	case I915_TILING_NONE:
-		break;
-	case I915_TILING_X:
-	case I915_TILING_Y:
-		obj->tiling_and_stride =
-			plane_config->fb->base.pitches[0] |
-			plane_config->tiling;
-		break;
-	default:
-		MISSING_CASE(plane_config->tiling);
-		goto err_obj;
-	}
-
-	vma = i915_vma_instance(obj, &i915->ggtt.vm, NULL);
-	if (IS_ERR(vma))
-		goto err_obj;
-
-	if (i915_ggtt_pin(vma, NULL, 0, PIN_MAPPABLE | PIN_OFFSET_FIXED | base))
-		goto err_obj;
-
-	if (i915_gem_object_is_tiled(obj) &&
-	    !i915_vma_is_map_and_fenceable(vma))
-		goto err_obj;
-
-	return vma;
-
-err_obj:
-	i915_gem_object_put(obj);
-	return NULL;
-}
-
-static bool
-intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
-			      struct intel_initial_plane_config *plane_config)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
-	struct drm_framebuffer *fb = &plane_config->fb->base;
-	struct i915_vma *vma;
-
-	switch (fb->modifier) {
-	case DRM_FORMAT_MOD_LINEAR:
-	case I915_FORMAT_MOD_X_TILED:
-	case I915_FORMAT_MOD_Y_TILED:
-		break;
-	default:
-		drm_dbg(&dev_priv->drm,
-			"Unsupported modifier for initial FB: 0x%llx\n",
-			fb->modifier);
-		return false;
-	}
-
-	vma = initial_plane_vma(dev_priv, plane_config);
-	if (!vma)
-		return false;
-
-	mode_cmd.pixel_format = fb->format->format;
-	mode_cmd.width = fb->width;
-	mode_cmd.height = fb->height;
-	mode_cmd.pitches[0] = fb->pitches[0];
-	mode_cmd.modifier[0] = fb->modifier;
-	mode_cmd.flags = DRM_MODE_FB_MODIFIERS;
-
-	if (intel_framebuffer_init(to_intel_framebuffer(fb),
-				   vma->obj, &mode_cmd)) {
-		drm_dbg_kms(&dev_priv->drm, "intel fb init failed\n");
-		goto err_vma;
-	}
-
-	plane_config->vma = vma;
-	return true;
-
-err_vma:
-	i915_vma_put(vma);
-	return false;
-}
-
 static void
 intel_set_plane_visible(struct intel_crtc_state *crtc_state,
 			struct intel_plane_state *plane_state,
@@ -1390,8 +1274,8 @@ static void fixup_plane_bitmasks(struct intel_crtc_state *crtc_state)
 	}
 }
 
-static void intel_plane_disable_noatomic(struct intel_crtc *crtc,
-					 struct intel_plane *plane)
+void intel_plane_disable_noatomic(struct intel_crtc *crtc,
+				  struct intel_plane *plane)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_crtc_state *crtc_state =
@@ -1436,123 +1320,6 @@ static void intel_plane_disable_noatomic(struct intel_crtc *crtc,
 	intel_wait_for_vblank(dev_priv, crtc->pipe);
 }
 
-static bool
-intel_reuse_initial_plane_obj(struct drm_i915_private *i915,
-			      const struct intel_initial_plane_config *plane_config,
-			      struct drm_framebuffer **fb,
-			      struct i915_vma **vma)
-{
-	struct intel_crtc *crtc;
-
-	for_each_intel_crtc(&i915->drm, crtc) {
-		struct intel_crtc_state *crtc_state =
-			to_intel_crtc_state(crtc->base.state);
-		struct intel_plane *plane =
-			to_intel_plane(crtc->base.primary);
-		struct intel_plane_state *plane_state =
-			to_intel_plane_state(plane->base.state);
-
-		if (!crtc_state->uapi.active)
-			continue;
-
-		if (!plane_state->ggtt_vma)
-			continue;
-
-		if (intel_plane_ggtt_offset(plane_state) == plane_config->base) {
-			*fb = plane_state->hw.fb;
-			*vma = plane_state->ggtt_vma;
-			return true;
-		}
-	}
-
-	return false;
-}
-
-static void
-intel_find_initial_plane_obj(struct intel_crtc *crtc,
-			     struct intel_initial_plane_config *plane_config)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_crtc_state *crtc_state =
-		to_intel_crtc_state(crtc->base.state);
-	struct intel_plane *plane =
-		to_intel_plane(crtc->base.primary);
-	struct intel_plane_state *plane_state =
-		to_intel_plane_state(plane->base.state);
-	struct drm_framebuffer *fb;
-	struct i915_vma *vma;
-
-	/*
-	 * TODO:
-	 *   Disable planes if get_initial_plane_config() failed.
-	 *   Make sure things work if the surface base is not page aligned.
-	 */
-	if (!plane_config->fb)
-		return;
-
-	if (intel_alloc_initial_plane_obj(crtc, plane_config)) {
-		fb = &plane_config->fb->base;
-		vma = plane_config->vma;
-		goto valid_fb;
-	}
-
-	/*
-	 * Failed to alloc the obj, check to see if we should share
-	 * an fb with another CRTC instead
-	 */
-	if (intel_reuse_initial_plane_obj(dev_priv, plane_config, &fb, &vma))
-		goto valid_fb;
-
-	/*
-	 * We've failed to reconstruct the BIOS FB.  Current display state
-	 * indicates that the primary plane is visible, but has a NULL FB,
-	 * which will lead to problems later if we don't fix it up.  The
-	 * simplest solution is to just disable the primary plane now and
-	 * pretend the BIOS never had it enabled.
-	 */
-	intel_plane_disable_noatomic(crtc, plane);
-	if (crtc_state->bigjoiner) {
-		struct intel_crtc *slave =
-			crtc_state->bigjoiner_linked_crtc;
-		intel_plane_disable_noatomic(slave, to_intel_plane(slave->base.primary));
-	}
-
-	return;
-
-valid_fb:
-	plane_state->uapi.rotation = plane_config->rotation;
-	intel_fb_fill_view(to_intel_framebuffer(fb),
-			   plane_state->uapi.rotation, &plane_state->view);
-
-	__i915_vma_pin(vma);
-	plane_state->ggtt_vma = i915_vma_get(vma);
-	if (intel_plane_uses_fence(plane_state) &&
-	    i915_vma_pin_fence(vma) == 0 && vma->fence)
-		plane_state->flags |= PLANE_HAS_FENCE;
-
-	plane_state->uapi.src_x = 0;
-	plane_state->uapi.src_y = 0;
-	plane_state->uapi.src_w = fb->width << 16;
-	plane_state->uapi.src_h = fb->height << 16;
-
-	plane_state->uapi.crtc_x = 0;
-	plane_state->uapi.crtc_y = 0;
-	plane_state->uapi.crtc_w = fb->width;
-	plane_state->uapi.crtc_h = fb->height;
-
-	if (plane_config->tiling)
-		dev_priv->preserve_bios_swizzle = true;
-
-	plane_state->uapi.fb = fb;
-	drm_framebuffer_get(fb);
-
-	plane_state->uapi.crtc = &crtc->base;
-	intel_plane_copy_uapi_to_hw_state(plane_state, plane_state, crtc);
-
-	atomic_or(plane->frontbuffer_bit, &to_intel_frontbuffer(fb)->bits);
-}
-
 unsigned int
 intel_plane_fence_y_offset(const struct intel_plane_state *plane_state)
 {
@@ -11373,22 +11140,6 @@ static void intel_mode_config_cleanup(struct drm_i915_private *i915)
 	drm_mode_config_cleanup(&i915->drm);
 }
 
-static void plane_config_fini(struct intel_initial_plane_config *plane_config)
-{
-	if (plane_config->fb) {
-		struct drm_framebuffer *fb = &plane_config->fb->base;
-
-		/* We may only have the stub and not a full framebuffer */
-		if (drm_framebuffer_read_refcount(fb))
-			drm_framebuffer_put(fb);
-		else
-			kfree(fb);
-	}
-
-	if (plane_config->vma)
-		i915_vma_put(plane_config->vma);
-}
-
 /* part #1: call before irq install */
 int intel_modeset_init_noirq(struct drm_i915_private *i915)
 {
@@ -11460,30 +11211,6 @@ cleanup_bios:
 	return ret;
 }
 
-static void
-intel_crtc_initial_plane_config(struct intel_crtc *crtc)
-{
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct intel_initial_plane_config plane_config = {};
-
-	/*
-	 * Note that reserving the BIOS fb up front prevents us
-	 * from stuffing other stolen allocations like the ring
-	 * on top.  This prevents some ugliness at boot time, and
-	 * 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);
-
-	/*
-	 * If the fb is shared between multiple heads, we'll
-	 * just get the first one.
-	 */
-	intel_find_initial_plane_obj(crtc, &plane_config);
-
-	plane_config_fini(&plane_config);
-}
-
 /* part #2: call after irq install, but before gem init */
 int intel_modeset_init_nogem(struct drm_i915_private *i915)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index d655d996d465..38afc758d7d4 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -625,6 +625,8 @@ void intel_plane_unpin_fb(struct intel_plane_state *old_plane_state);
 struct intel_encoder *
 intel_get_crtc_new_encoder(const struct intel_atomic_state *state,
 			   const struct intel_crtc_state *crtc_state);
+void intel_plane_disable_noatomic(struct intel_crtc *crtc,
+				  struct intel_plane *plane);
 
 void intel_display_driver_register(struct drm_i915_private *i915);
 void intel_display_driver_unregister(struct drm_i915_private *i915);
diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c
new file mode 100644
index 000000000000..dcd698a02da2
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
@@ -0,0 +1,283 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include "intel_display_types.h"
+#include "intel_plane_initial.h"
+#include "intel_atomic_plane.h"
+#include "intel_display.h"
+#include "intel_fb.h"
+
+static bool
+intel_reuse_initial_plane_obj(struct drm_i915_private *i915,
+			      const struct intel_initial_plane_config *plane_config,
+			      struct drm_framebuffer **fb,
+			      struct i915_vma **vma)
+{
+	struct intel_crtc *crtc;
+
+	for_each_intel_crtc(&i915->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+		struct intel_plane *plane =
+			to_intel_plane(crtc->base.primary);
+		struct intel_plane_state *plane_state =
+			to_intel_plane_state(plane->base.state);
+
+		if (!crtc_state->uapi.active)
+			continue;
+
+		if (!plane_state->ggtt_vma)
+			continue;
+
+		if (intel_plane_ggtt_offset(plane_state) == plane_config->base) {
+			*fb = plane_state->hw.fb;
+			*vma = plane_state->ggtt_vma;
+			return true;
+		}
+	}
+
+	return false;
+}
+
+static struct i915_vma *
+initial_plane_vma(struct drm_i915_private *i915,
+		  struct intel_initial_plane_config *plane_config)
+{
+	struct drm_i915_gem_object *obj;
+	struct i915_vma *vma;
+	u32 base, size;
+
+	if (plane_config->size == 0)
+		return NULL;
+
+	base = round_down(plane_config->base,
+			  I915_GTT_MIN_ALIGNMENT);
+	size = round_up(plane_config->base + plane_config->size,
+			I915_GTT_MIN_ALIGNMENT);
+	size -= base;
+
+	/*
+	 * If the FB is too big, just don't use it since fbdev is not very
+	 * important and we should probably use that space with FBC or other
+	 * features.
+	 */
+	if (IS_ENABLED(CONFIG_FRAMEBUFFER_CONSOLE) &&
+	    size * 2 > i915->stolen_usable_size)
+		return NULL;
+
+	obj = i915_gem_object_create_stolen_for_preallocated(i915, base, size);
+	if (IS_ERR(obj))
+		return NULL;
+
+	/*
+	 * Mark it WT ahead of time to avoid changing the
+	 * cache_level during fbdev initialization. The
+	 * unbind there would get stuck waiting for rcu.
+	 */
+	i915_gem_object_set_cache_coherency(obj, HAS_WT(i915) ?
+					    I915_CACHE_WT : I915_CACHE_NONE);
+
+	switch (plane_config->tiling) {
+	case I915_TILING_NONE:
+		break;
+	case I915_TILING_X:
+	case I915_TILING_Y:
+		obj->tiling_and_stride =
+			plane_config->fb->base.pitches[0] |
+			plane_config->tiling;
+		break;
+	default:
+		MISSING_CASE(plane_config->tiling);
+		goto err_obj;
+	}
+
+	vma = i915_vma_instance(obj, &i915->ggtt.vm, NULL);
+	if (IS_ERR(vma))
+		goto err_obj;
+
+	if (i915_ggtt_pin(vma, NULL, 0, PIN_MAPPABLE | PIN_OFFSET_FIXED | base))
+		goto err_obj;
+
+	if (i915_gem_object_is_tiled(obj) &&
+	    !i915_vma_is_map_and_fenceable(vma))
+		goto err_obj;
+
+	return vma;
+
+err_obj:
+	i915_gem_object_put(obj);
+	return NULL;
+}
+
+static bool
+intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
+			      struct intel_initial_plane_config *plane_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
+	struct drm_framebuffer *fb = &plane_config->fb->base;
+	struct i915_vma *vma;
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+	case I915_FORMAT_MOD_Y_TILED:
+		break;
+	default:
+		drm_dbg(&dev_priv->drm,
+			"Unsupported modifier for initial FB: 0x%llx\n",
+			fb->modifier);
+		return false;
+	}
+
+	vma = initial_plane_vma(dev_priv, plane_config);
+	if (!vma)
+		return false;
+
+	mode_cmd.pixel_format = fb->format->format;
+	mode_cmd.width = fb->width;
+	mode_cmd.height = fb->height;
+	mode_cmd.pitches[0] = fb->pitches[0];
+	mode_cmd.modifier[0] = fb->modifier;
+	mode_cmd.flags = DRM_MODE_FB_MODIFIERS;
+
+	if (intel_framebuffer_init(to_intel_framebuffer(fb),
+				   vma->obj, &mode_cmd)) {
+		drm_dbg_kms(&dev_priv->drm, "intel fb init failed\n");
+		goto err_vma;
+	}
+
+	plane_config->vma = vma;
+	return true;
+
+err_vma:
+	i915_vma_put(vma);
+	return false;
+}
+
+static void
+intel_find_initial_plane_obj(struct intel_crtc *crtc,
+			     struct intel_initial_plane_config *plane_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc_state *crtc_state =
+		to_intel_crtc_state(crtc->base.state);
+	struct intel_plane *plane =
+		to_intel_plane(crtc->base.primary);
+	struct intel_plane_state *plane_state =
+		to_intel_plane_state(plane->base.state);
+	struct drm_framebuffer *fb;
+	struct i915_vma *vma;
+
+	/*
+	 * TODO:
+	 *   Disable planes if get_initial_plane_config() failed.
+	 *   Make sure things work if the surface base is not page aligned.
+	 */
+	if (!plane_config->fb)
+		return;
+
+	if (intel_alloc_initial_plane_obj(crtc, plane_config)) {
+		fb = &plane_config->fb->base;
+		vma = plane_config->vma;
+		goto valid_fb;
+	}
+
+	/*
+	 * Failed to alloc the obj, check to see if we should share
+	 * an fb with another CRTC instead
+	 */
+	if (intel_reuse_initial_plane_obj(dev_priv, plane_config, &fb, &vma))
+		goto valid_fb;
+
+	/*
+	 * We've failed to reconstruct the BIOS FB.  Current display state
+	 * indicates that the primary plane is visible, but has a NULL FB,
+	 * which will lead to problems later if we don't fix it up.  The
+	 * simplest solution is to just disable the primary plane now and
+	 * pretend the BIOS never had it enabled.
+	 */
+	intel_plane_disable_noatomic(crtc, plane);
+	if (crtc_state->bigjoiner) {
+		struct intel_crtc *slave =
+			crtc_state->bigjoiner_linked_crtc;
+		intel_plane_disable_noatomic(slave, to_intel_plane(slave->base.primary));
+	}
+
+	return;
+
+valid_fb:
+	plane_state->uapi.rotation = plane_config->rotation;
+	intel_fb_fill_view(to_intel_framebuffer(fb),
+			   plane_state->uapi.rotation, &plane_state->view);
+
+	__i915_vma_pin(vma);
+	plane_state->ggtt_vma = i915_vma_get(vma);
+	if (intel_plane_uses_fence(plane_state) &&
+	    i915_vma_pin_fence(vma) == 0 && vma->fence)
+		plane_state->flags |= PLANE_HAS_FENCE;
+
+	plane_state->uapi.src_x = 0;
+	plane_state->uapi.src_y = 0;
+	plane_state->uapi.src_w = fb->width << 16;
+	plane_state->uapi.src_h = fb->height << 16;
+
+	plane_state->uapi.crtc_x = 0;
+	plane_state->uapi.crtc_y = 0;
+	plane_state->uapi.crtc_w = fb->width;
+	plane_state->uapi.crtc_h = fb->height;
+
+	if (plane_config->tiling)
+		dev_priv->preserve_bios_swizzle = true;
+
+	plane_state->uapi.fb = fb;
+	drm_framebuffer_get(fb);
+
+	plane_state->uapi.crtc = &crtc->base;
+	intel_plane_copy_uapi_to_hw_state(plane_state, plane_state, crtc);
+
+	atomic_or(plane->frontbuffer_bit, &to_intel_frontbuffer(fb)->bits);
+}
+
+static void plane_config_fini(struct intel_initial_plane_config *plane_config)
+{
+	if (plane_config->fb) {
+		struct drm_framebuffer *fb = &plane_config->fb->base;
+
+		/* We may only have the stub and not a full framebuffer */
+		if (drm_framebuffer_read_refcount(fb))
+			drm_framebuffer_put(fb);
+		else
+			kfree(fb);
+	}
+
+	if (plane_config->vma)
+		i915_vma_put(plane_config->vma);
+}
+
+void intel_crtc_initial_plane_config(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_initial_plane_config plane_config = {};
+
+	/*
+	 * Note that reserving the BIOS fb up front prevents us
+	 * from stuffing other stolen allocations like the ring
+	 * on top.  This prevents some ugliness at boot time, and
+	 * 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);
+
+	/*
+	 * If the fb is shared between multiple heads, we'll
+	 * just get the first one.
+	 */
+	intel_find_initial_plane_obj(crtc, &plane_config);
+
+	plane_config_fini(&plane_config);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.h b/drivers/gpu/drm/i915/display/intel_plane_initial.h
new file mode 100644
index 000000000000..c7e35ab3182b
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef __INTEL_PLANE_INITIAL_H__
+#define __INTEL_PLANE_INITIAL_H__
+
+struct intel_crtc;
+
+void intel_crtc_initial_plane_config(struct intel_crtc *crtc);
+
+#endif