lkl_linux/drivers/gpu/drm/gma500/framebuffer.c

// SPDX-License-Identifier: GPL-2.0-only
/**************************************************************************
 * Copyright (c) 2007-2011, Intel Corporation.
 * All Rights Reserved.
 *
 **************************************************************************/

#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_helper.h>

#include "framebuffer.h"
#include "psb_drv.h"

static const struct drm_framebuffer_funcs psb_fb_funcs = {
	.destroy = drm_gem_fb_destroy,
	.create_handle = drm_gem_fb_create_handle,
};

/**
 *	psb_framebuffer_init	-	initialize a framebuffer
 *	@dev: our DRM device
 *	@fb: framebuffer to set up
 *	@mode_cmd: mode description
 *	@obj: backing object
 *
 *	Configure and fill in the boilerplate for our frame buffer. Return
 *	0 on success or an error code if we fail.
 */
static int psb_framebuffer_init(struct drm_device *dev,
					struct drm_framebuffer *fb,
					const struct drm_mode_fb_cmd2 *mode_cmd,
					struct drm_gem_object *obj)
{
	const struct drm_format_info *info;
	int ret;

	/*
	 * Reject unknown formats, YUV formats, and formats with more than
	 * 4 bytes per pixel.
	 */
	info = drm_get_format_info(dev, mode_cmd);
	if (!info || !info->depth || info->cpp[0] > 4)
		return -EINVAL;

	if (mode_cmd->pitches[0] & 63)
		return -EINVAL;

	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
	fb->obj[0] = obj;
	ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
	if (ret) {
		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
		return ret;
	}
	return 0;
}

/**
 *	psb_framebuffer_create	-	create a framebuffer backed by gt
 *	@dev: our DRM device
 *	@mode_cmd: the description of the requested mode
 *	@obj: the backing object
 *
 *	Create a framebuffer object backed by the gt, and fill in the
 *	boilerplate required
 *
 *	TODO: review object references
 */
struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
					       const struct drm_mode_fb_cmd2 *mode_cmd,
					       struct drm_gem_object *obj)
{
	struct drm_framebuffer *fb;
	int ret;

	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
	if (!fb)
		return ERR_PTR(-ENOMEM);

	ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
	if (ret) {
		kfree(fb);
		return ERR_PTR(ret);
	}
	return fb;
}

/**
 *	psb_user_framebuffer_create	-	create framebuffer
 *	@dev: our DRM device
 *	@filp: client file
 *	@cmd: mode request
 *
 *	Create a new framebuffer backed by a userspace GEM object
 */
static struct drm_framebuffer *psb_user_framebuffer_create
			(struct drm_device *dev, struct drm_file *filp,
			 const struct drm_mode_fb_cmd2 *cmd)
{
	struct drm_gem_object *obj;
	struct drm_framebuffer *fb;

	/*
	 *	Find the GEM object and thus the gtt range object that is
	 *	to back this space
	 */
	obj = drm_gem_object_lookup(filp, cmd->handles[0]);
	if (obj == NULL)
		return ERR_PTR(-ENOENT);

	/* Let the core code do all the work */
	fb = psb_framebuffer_create(dev, cmd, obj);
	if (IS_ERR(fb))
		drm_gem_object_put(obj);

	return fb;
}

static const struct drm_mode_config_funcs psb_mode_funcs = {
	.fb_create = psb_user_framebuffer_create,
};

static void psb_setup_outputs(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
	struct drm_connector_list_iter conn_iter;
	struct drm_connector *connector;

	drm_mode_create_scaling_mode_property(dev);

	/* It is ok for this to fail - we just don't get backlight control */
	if (!dev_priv->backlight_property)
		dev_priv->backlight_property = drm_property_create_range(dev, 0,
							"backlight", 0, 100);
	dev_priv->ops->output_init(dev);

	drm_connector_list_iter_begin(dev, &conn_iter);
	drm_for_each_connector_iter(connector, &conn_iter) {
		struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
		struct drm_encoder *encoder = &gma_encoder->base;
		int crtc_mask = 0, clone_mask = 0;

		/* valid crtcs */
		switch (gma_encoder->type) {
		case INTEL_OUTPUT_ANALOG:
			crtc_mask = (1 << 0);
			clone_mask = (1 << INTEL_OUTPUT_ANALOG);
			break;
		case INTEL_OUTPUT_SDVO:
			crtc_mask = dev_priv->ops->sdvo_mask;
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_LVDS:
			crtc_mask = dev_priv->ops->lvds_mask;
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_MIPI:
			crtc_mask = (1 << 0);
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_MIPI2:
			crtc_mask = (1 << 2);
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_HDMI:
			crtc_mask = dev_priv->ops->hdmi_mask;
			clone_mask = (1 << INTEL_OUTPUT_HDMI);
			break;
		case INTEL_OUTPUT_DISPLAYPORT:
			crtc_mask = (1 << 0) | (1 << 1);
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_EDP:
			crtc_mask = (1 << 1);
			clone_mask = 0;
		}
		encoder->possible_crtcs = crtc_mask;
		encoder->possible_clones =
		    gma_connector_clones(dev, clone_mask);
	}
	drm_connector_list_iter_end(&conn_iter);
}

void psb_modeset_init(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
	struct pci_dev *pdev = to_pci_dev(dev->dev);
	int i;

	if (drmm_mode_config_init(dev))
		return;

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	dev->mode_config.funcs = &psb_mode_funcs;

	/* set memory base */
	/* Oaktrail and Poulsbo should use BAR 2*/
	pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev_priv->fb_base));

	/* num pipes is 2 for PSB but 1 for Mrst */
	for (i = 0; i < dev_priv->num_pipe; i++)
		psb_intel_crtc_init(dev, i, mode_dev);

	dev->mode_config.max_width = 4096;
	dev->mode_config.max_height = 4096;

	psb_setup_outputs(dev);

	if (dev_priv->ops->errata)
	        dev_priv->ops->errata(dev);

        dev_priv->modeset = true;
}

void psb_modeset_cleanup(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
	if (dev_priv->modeset) {
		drm_kms_helper_poll_fini(dev);
	}
}