drivers/gpu/drm/xe/display/xe_plane_initial.c - linux - Git at Google

 // SPDX-License-Identifier: MIT
 /*
  * Copyright © 2021 Intel Corporation
  */

 /* for ioread64 */
 #include <linux/io-64-nonatomic-lo-hi.h>

 #include "regs/xe_gtt_defs.h"
 #include "xe_ggtt.h"

 #include "intel_atomic_plane.h"
 #include "intel_crtc.h"
 #include "intel_display.h"
 #include "intel_display_types.h"
 #include "intel_fb.h"
 #include "intel_fb_pin.h"
 #include "intel_frontbuffer.h"
 #include "intel_plane_initial.h"
 #include "xe_bo.h"
 #include "xe_wa.h"

 #include <generated/xe_wa_oob.h>

 static bool
 intel_reuse_initial_plane_obj(struct intel_crtc *this,
 			      const struct intel_initial_plane_config plane_configs[],
 			      struct drm_framebuffer **fb)
 {
 	struct xe_device *xe = to_xe_device(this->base.dev);
 	struct intel_crtc *crtc;

 	for_each_intel_crtc(&xe->drm, crtc) {
 		struct intel_plane *plane =
 			to_intel_plane(crtc->base.primary);
 		const struct intel_plane_state *plane_state =
 			to_intel_plane_state(plane->base.state);
 		const struct intel_crtc_state *crtc_state =
 			to_intel_crtc_state(crtc->base.state);

 		if (!crtc_state->uapi.active)
 			continue;

 		if (!plane_state->ggtt_vma)
 			continue;

 		if (plane_configs[this->pipe].base == plane_configs[crtc->pipe].base) {
 			*fb = plane_state->hw.fb;
 			return true;
 		}
 	}

 	return false;
 }

 static struct xe_bo *
 initial_plane_bo(struct xe_device *xe,
 		 struct intel_initial_plane_config *plane_config)
 {
 	struct xe_tile *tile0 = xe_device_get_root_tile(xe);
 	struct xe_bo *bo;
 	resource_size_t phys_base;
 	u32 base, size, flags;
 	u64 page_size = xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ? SZ_64K : SZ_4K;

 	if (plane_config->size == 0)
 		return NULL;

 	flags = XE_BO_FLAG_PINNED | XE_BO_FLAG_SCANOUT | XE_BO_FLAG_GGTT;

 	base = round_down(plane_config->base, page_size);
 	if (IS_DGFX(xe)) {
 		u64 __iomem *gte = tile0->mem.ggtt->gsm;
 		u64 pte;

 		gte += base / XE_PAGE_SIZE;

 		pte = ioread64(gte);
 		if (!(pte & XE_GGTT_PTE_DM)) {
 			drm_err(&xe->drm,
 				"Initial plane programming missing DM bit\n");
 			return NULL;
 		}

 		phys_base = pte & ~(page_size - 1);
 		flags |= XE_BO_FLAG_VRAM0;

 		/*
 		 * We don't currently expect this to ever be placed in the
 		 * stolen portion.
 		 */
 		if (phys_base >= tile0->mem.vram.usable_size) {
 			drm_err(&xe->drm,
 				"Initial plane programming using invalid range, phys_base=%pa\n",
 				&phys_base);
 			return NULL;
 		}

 		drm_dbg(&xe->drm,
 			"Using phys_base=%pa, based on initial plane programming\n",
 			&phys_base);
 	} else {
 		struct ttm_resource_manager *stolen = ttm_manager_type(&xe->ttm, XE_PL_STOLEN);

 		if (!stolen)
 			return NULL;
 		phys_base = base;
 		flags |= XE_BO_FLAG_STOLEN;

 		if (XE_WA(xe_root_mmio_gt(xe), 22019338487_display))
 			return NULL;

 		/*
 		 * 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) &&
 		    plane_config->size * 2 >> PAGE_SHIFT >= stolen->size)
 			return NULL;
 	}

 	size = round_up(plane_config->base + plane_config->size,
 			page_size);
 	size -= base;

 	bo = xe_bo_create_pin_map_at(xe, tile0, NULL, size, phys_base,
 				     ttm_bo_type_kernel, flags);
 	if (IS_ERR(bo)) {
 		drm_dbg(&xe->drm,
 			"Failed to create bo phys_base=%pa size %u with flags %x: %li\n",
 			&phys_base, size, flags, PTR_ERR(bo));
 		return NULL;
 	}

 	return bo;
 }

 static bool
 intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
 			      struct intel_initial_plane_config *plane_config)
 {
 	struct xe_device *xe = to_xe_device(crtc->base.dev);
 	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
 	struct drm_framebuffer *fb = &plane_config->fb->base;
 	struct xe_bo *bo;

 	switch (fb->modifier) {
 	case DRM_FORMAT_MOD_LINEAR:
 	case I915_FORMAT_MOD_X_TILED:
 	case I915_FORMAT_MOD_Y_TILED:
 	case I915_FORMAT_MOD_4_TILED:
 		break;
 	default:
 		drm_dbg_kms(&xe->drm,
 			    "Unsupported modifier for initial FB: 0x%llx\n",
 			    fb->modifier);
 		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;

 	bo = initial_plane_bo(xe, plane_config);
 	if (!bo)
 		return false;

 	if (intel_framebuffer_init(to_intel_framebuffer(fb),
 				   bo, &mode_cmd)) {
 		drm_dbg_kms(&xe->drm, "intel fb init failed\n");
 		goto err_bo;
 	}
 	/* Reference handed over to fb */
 	xe_bo_put(bo);

 	return true;

 err_bo:
 	xe_bo_unpin_map_no_vm(bo);
 	return false;
 }

 static void
 intel_find_initial_plane_obj(struct intel_crtc *crtc,
 			     struct intel_initial_plane_config plane_configs[])
 {
 	struct intel_initial_plane_config *plane_config =
 		&plane_configs[crtc->pipe];
 	struct intel_plane *plane =
 		to_intel_plane(crtc->base.primary);
 	struct intel_plane_state *plane_state =
 		to_intel_plane_state(plane->base.state);
 	struct intel_crtc_state *crtc_state =
 		to_intel_crtc_state(crtc->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;
 	else if (!intel_reuse_initial_plane_obj(crtc, plane_configs, &fb))
 		goto nofb;

 	plane_state->uapi.rotation = plane_config->rotation;
 	intel_fb_fill_view(to_intel_framebuffer(fb),
 			   plane_state->uapi.rotation, &plane_state->view);

 	vma = intel_fb_pin_to_ggtt(fb, &plane_state->view.gtt,
 				   0, 0, false, &plane_state->flags);
 	if (IS_ERR(vma))
 		goto nofb;

 	plane_state->ggtt_vma = vma;
 	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;

 	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);

 	plane_config->vma = vma;

 	/*
 	 * Flip to the newly created mapping ASAP, so we can re-use the
 	 * first part of GGTT for WOPCM, prevent flickering, and prevent
 	 * the lookup of sysmem scratch pages.
 	 */
 	plane->check_plane(crtc_state, plane_state);
 	plane->async_flip(plane, crtc_state, plane_state, true);
 	return;

 nofb:
 	/*
 	 * 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);
 }

 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);
 	}
 }

 void intel_initial_plane_config(struct drm_i915_private *i915)
 {
 	struct intel_initial_plane_config plane_configs[I915_MAX_PIPES] = {};
 	struct intel_crtc *crtc;

 	for_each_intel_crtc(&i915->drm, crtc) {
 		struct intel_initial_plane_config *plane_config =
 			&plane_configs[crtc->pipe];

 		if (!to_intel_crtc_state(crtc->base.state)->uapi.active)
 			continue;

 		/*
 		 * 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.
 		 */
 		i915->display.funcs.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_configs);

 		if (i915->display.funcs.display->fixup_initial_plane_config(crtc, plane_config))
 			intel_crtc_wait_for_next_vblank(crtc);

 		plane_config_fini(plane_config);
 	}
 }
	// SPDX-License-Identifier: MIT
	/*
	* Copyright © 2021 Intel Corporation
	*/

	/* for ioread64 */
	#include <linux/io-64-nonatomic-lo-hi.h>

	#include "regs/xe_gtt_defs.h"
	#include "xe_ggtt.h"

	#include "intel_atomic_plane.h"
	#include "intel_crtc.h"
	#include "intel_display.h"
	#include "intel_display_types.h"
	#include "intel_fb.h"
	#include "intel_fb_pin.h"
	#include "intel_frontbuffer.h"
	#include "intel_plane_initial.h"
	#include "xe_bo.h"
	#include "xe_wa.h"

	#include <generated/xe_wa_oob.h>

	static bool
	intel_reuse_initial_plane_obj(struct intel_crtc *this,
	const struct intel_initial_plane_config plane_configs[],
	struct drm_framebuffer **fb)
	{
	struct xe_device *xe = to_xe_device(this->base.dev);
	struct intel_crtc *crtc;

	for_each_intel_crtc(&xe->drm, crtc) {
	struct intel_plane *plane =
	to_intel_plane(crtc->base.primary);
	const struct intel_plane_state *plane_state =
	to_intel_plane_state(plane->base.state);
	const struct intel_crtc_state *crtc_state =
	to_intel_crtc_state(crtc->base.state);

	if (!crtc_state->uapi.active)
	continue;

	if (!plane_state->ggtt_vma)
	continue;

	if (plane_configs[this->pipe].base == plane_configs[crtc->pipe].base) {
	*fb = plane_state->hw.fb;
	return true;
	}
	}

	return false;
	}

	static struct xe_bo *
	initial_plane_bo(struct xe_device *xe,
	struct intel_initial_plane_config *plane_config)
	{
	struct xe_tile *tile0 = xe_device_get_root_tile(xe);
	struct xe_bo *bo;
	resource_size_t phys_base;
	u32 base, size, flags;
	u64 page_size = xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ? SZ_64K : SZ_4K;

	if (plane_config->size == 0)
	return NULL;

	flags = XE_BO_FLAG_PINNED \| XE_BO_FLAG_SCANOUT \| XE_BO_FLAG_GGTT;

	base = round_down(plane_config->base, page_size);
	if (IS_DGFX(xe)) {
	u64 __iomem *gte = tile0->mem.ggtt->gsm;
	u64 pte;

	gte += base / XE_PAGE_SIZE;

	pte = ioread64(gte);
	if (!(pte & XE_GGTT_PTE_DM)) {
	drm_err(&xe->drm,
	"Initial plane programming missing DM bit\n");
	return NULL;
	}

	phys_base = pte & ~(page_size - 1);
	flags \|= XE_BO_FLAG_VRAM0;

	/*
	* We don't currently expect this to ever be placed in the
	* stolen portion.
	*/
	if (phys_base >= tile0->mem.vram.usable_size) {
	drm_err(&xe->drm,
	"Initial plane programming using invalid range, phys_base=%pa\n",
	&phys_base);
	return NULL;
	}

	drm_dbg(&xe->drm,
	"Using phys_base=%pa, based on initial plane programming\n",
	&phys_base);
	} else {
	struct ttm_resource_manager *stolen = ttm_manager_type(&xe->ttm, XE_PL_STOLEN);

	if (!stolen)
	return NULL;
	phys_base = base;
	flags \|= XE_BO_FLAG_STOLEN;

	if (XE_WA(xe_root_mmio_gt(xe), 22019338487_display))
	return NULL;

	/*
	* 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) &&
	plane_config->size * 2 >> PAGE_SHIFT >= stolen->size)
	return NULL;
	}

	size = round_up(plane_config->base + plane_config->size,
	page_size);
	size -= base;

	bo = xe_bo_create_pin_map_at(xe, tile0, NULL, size, phys_base,
	ttm_bo_type_kernel, flags);
	if (IS_ERR(bo)) {
	drm_dbg(&xe->drm,
	"Failed to create bo phys_base=%pa size %u with flags %x: %li\n",
	&phys_base, size, flags, PTR_ERR(bo));
	return NULL;
	}

	return bo;
	}

	static bool
	intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
	struct intel_initial_plane_config *plane_config)
	{
	struct xe_device *xe = to_xe_device(crtc->base.dev);
	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
	struct drm_framebuffer *fb = &plane_config->fb->base;
	struct xe_bo *bo;

	switch (fb->modifier) {
	case DRM_FORMAT_MOD_LINEAR:
	case I915_FORMAT_MOD_X_TILED:
	case I915_FORMAT_MOD_Y_TILED:
	case I915_FORMAT_MOD_4_TILED:
	break;
	default:
	drm_dbg_kms(&xe->drm,
	"Unsupported modifier for initial FB: 0x%llx\n",
	fb->modifier);
	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;

	bo = initial_plane_bo(xe, plane_config);
	if (!bo)
	return false;

	if (intel_framebuffer_init(to_intel_framebuffer(fb),
	bo, &mode_cmd)) {
	drm_dbg_kms(&xe->drm, "intel fb init failed\n");
	goto err_bo;
	}
	/* Reference handed over to fb */
	xe_bo_put(bo);

	return true;

	err_bo:
	xe_bo_unpin_map_no_vm(bo);
	return false;
	}

	static void
	intel_find_initial_plane_obj(struct intel_crtc *crtc,
	struct intel_initial_plane_config plane_configs[])
	{
	struct intel_initial_plane_config *plane_config =
	&plane_configs[crtc->pipe];
	struct intel_plane *plane =
	to_intel_plane(crtc->base.primary);
	struct intel_plane_state *plane_state =
	to_intel_plane_state(plane->base.state);
	struct intel_crtc_state *crtc_state =
	to_intel_crtc_state(crtc->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;
	else if (!intel_reuse_initial_plane_obj(crtc, plane_configs, &fb))
	goto nofb;

	plane_state->uapi.rotation = plane_config->rotation;
	intel_fb_fill_view(to_intel_framebuffer(fb),
	plane_state->uapi.rotation, &plane_state->view);

	vma = intel_fb_pin_to_ggtt(fb, &plane_state->view.gtt,
	0, 0, false, &plane_state->flags);
	if (IS_ERR(vma))
	goto nofb;

	plane_state->ggtt_vma = vma;
	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;

	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);

	plane_config->vma = vma;

	/*
	* Flip to the newly created mapping ASAP, so we can re-use the
	* first part of GGTT for WOPCM, prevent flickering, and prevent
	* the lookup of sysmem scratch pages.
	*/
	plane->check_plane(crtc_state, plane_state);
	plane->async_flip(plane, crtc_state, plane_state, true);
	return;

	nofb:
	/*
	* 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);
	}

	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);
	}
	}

	void intel_initial_plane_config(struct drm_i915_private *i915)
	{
	struct intel_initial_plane_config plane_configs[I915_MAX_PIPES] = {};
	struct intel_crtc *crtc;

	for_each_intel_crtc(&i915->drm, crtc) {
	struct intel_initial_plane_config *plane_config =
	&plane_configs[crtc->pipe];

	if (!to_intel_crtc_state(crtc->base.state)->uapi.active)
	continue;

	/*
	* 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.
	*/
	i915->display.funcs.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_configs);

	if (i915->display.funcs.display->fixup_initial_plane_config(crtc, plane_config))
	intel_crtc_wait_for_next_vblank(crtc);

	plane_config_fini(plane_config);
	}
	}