1// SPDX-License-Identifier: GPL-2.0-only
  2/**************************************************************************
  3 * Copyright (c) 2007-2011, Intel Corporation.
  4 * All Rights Reserved.
  5 *
  6 **************************************************************************/
  7
  8#include <drm/drm_framebuffer.h>
  9#include <drm/drm_gem_framebuffer_helper.h>
 10#include <drm/drm_modeset_helper.h>
 11
 12#include "framebuffer.h"
 13#include "psb_drv.h"
 14
 15static const struct drm_framebuffer_funcs psb_fb_funcs = {
 16	.destroy = drm_gem_fb_destroy,
 17	.create_handle = drm_gem_fb_create_handle,
 18};
 19
 20/**
 21 *	psb_framebuffer_init	-	initialize a framebuffer
 22 *	@dev: our DRM device
 23 *	@fb: framebuffer to set up
 24 *	@mode_cmd: mode description
 25 *	@obj: backing object
 26 *
 27 *	Configure and fill in the boilerplate for our frame buffer. Return
 28 *	0 on success or an error code if we fail.
 29 */
 30static int psb_framebuffer_init(struct drm_device *dev,
 31					struct drm_framebuffer *fb,
 32					const struct drm_mode_fb_cmd2 *mode_cmd,
 33					struct drm_gem_object *obj)
 34{
 35	const struct drm_format_info *info;
 36	int ret;
 37
 38	/*
 39	 * Reject unknown formats, YUV formats, and formats with more than
 40	 * 4 bytes per pixel.
 41	 */
 42	info = drm_get_format_info(dev, mode_cmd);
 43	if (!info || !info->depth || info->cpp[0] > 4)
 44		return -EINVAL;
 45
 46	if (mode_cmd->pitches[0] & 63)
 47		return -EINVAL;
 48
 49	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 50	fb->obj[0] = obj;
 51	ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
 52	if (ret) {
 53		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 54		return ret;
 55	}
 56	return 0;
 57}
 58
 59/**
 60 *	psb_framebuffer_create	-	create a framebuffer backed by gt
 61 *	@dev: our DRM device
 62 *	@mode_cmd: the description of the requested mode
 63 *	@obj: the backing object
 64 *
 65 *	Create a framebuffer object backed by the gt, and fill in the
 66 *	boilerplate required
 67 *
 68 *	TODO: review object references
 69 */
 70struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
 71					       const struct drm_mode_fb_cmd2 *mode_cmd,
 72					       struct drm_gem_object *obj)
 73{
 74	struct drm_framebuffer *fb;
 75	int ret;
 76
 77	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 78	if (!fb)
 79		return ERR_PTR(-ENOMEM);
 80
 81	ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
 82	if (ret) {
 83		kfree(fb);
 84		return ERR_PTR(ret);
 85	}
 86	return fb;
 87}
 88
 89/**
 90 *	psb_user_framebuffer_create	-	create framebuffer
 91 *	@dev: our DRM device
 92 *	@filp: client file
 93 *	@cmd: mode request
 94 *
 95 *	Create a new framebuffer backed by a userspace GEM object
 96 */
 97static struct drm_framebuffer *psb_user_framebuffer_create
 98			(struct drm_device *dev, struct drm_file *filp,
 99			 const struct drm_mode_fb_cmd2 *cmd)
100{
101	struct drm_gem_object *obj;
102	struct drm_framebuffer *fb;
103
104	/*
105	 *	Find the GEM object and thus the gtt range object that is
106	 *	to back this space
107	 */
108	obj = drm_gem_object_lookup(filp, cmd->handles[0]);
109	if (obj == NULL)
110		return ERR_PTR(-ENOENT);
111
112	/* Let the core code do all the work */
113	fb = psb_framebuffer_create(dev, cmd, obj);
114	if (IS_ERR(fb))
115		drm_gem_object_put(obj);
116
117	return fb;
118}
119
120static const struct drm_mode_config_funcs psb_mode_funcs = {
121	.fb_create = psb_user_framebuffer_create,
122};
123
124static void psb_setup_outputs(struct drm_device *dev)
125{
126	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
127	struct drm_connector_list_iter conn_iter;
128	struct drm_connector *connector;
129
130	drm_mode_create_scaling_mode_property(dev);
131
132	/* It is ok for this to fail - we just don't get backlight control */
133	if (!dev_priv->backlight_property)
134		dev_priv->backlight_property = drm_property_create_range(dev, 0,
135							"backlight", 0, 100);
136	dev_priv->ops->output_init(dev);
137
138	drm_connector_list_iter_begin(dev, &conn_iter);
139	drm_for_each_connector_iter(connector, &conn_iter) {
140		struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
141		struct drm_encoder *encoder = &gma_encoder->base;
142		int crtc_mask = 0, clone_mask = 0;
143
144		/* valid crtcs */
145		switch (gma_encoder->type) {
146		case INTEL_OUTPUT_ANALOG:
147			crtc_mask = (1 << 0);
148			clone_mask = (1 << INTEL_OUTPUT_ANALOG);
149			break;
150		case INTEL_OUTPUT_SDVO:
151			crtc_mask = dev_priv->ops->sdvo_mask;
152			clone_mask = 0;
153			break;
154		case INTEL_OUTPUT_LVDS:
155			crtc_mask = dev_priv->ops->lvds_mask;
156			clone_mask = 0;
157			break;
158		case INTEL_OUTPUT_MIPI:
159			crtc_mask = (1 << 0);
160			clone_mask = 0;
161			break;
162		case INTEL_OUTPUT_MIPI2:
163			crtc_mask = (1 << 2);
164			clone_mask = 0;
165			break;
166		case INTEL_OUTPUT_HDMI:
167			crtc_mask = dev_priv->ops->hdmi_mask;
168			clone_mask = (1 << INTEL_OUTPUT_HDMI);
169			break;
170		case INTEL_OUTPUT_DISPLAYPORT:
171			crtc_mask = (1 << 0) | (1 << 1);
172			clone_mask = 0;
173			break;
174		case INTEL_OUTPUT_EDP:
175			crtc_mask = (1 << 1);
176			clone_mask = 0;
177		}
178		encoder->possible_crtcs = crtc_mask;
179		encoder->possible_clones =
180		    gma_connector_clones(dev, clone_mask);
181	}
182	drm_connector_list_iter_end(&conn_iter);
183}
184
185void psb_modeset_init(struct drm_device *dev)
186{
187	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
188	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
189	int i;
190
191	if (drmm_mode_config_init(dev))
192		return;
193
194	dev->mode_config.min_width = 0;
195	dev->mode_config.min_height = 0;
196
197	dev->mode_config.funcs = &psb_mode_funcs;
198
199	/* num pipes is 2 for PSB but 1 for Mrst */
200	for (i = 0; i < dev_priv->num_pipe; i++)
201		psb_intel_crtc_init(dev, i, mode_dev);
202
203	dev->mode_config.max_width = 4096;
204	dev->mode_config.max_height = 4096;
205
206	psb_setup_outputs(dev);
207
208	if (dev_priv->ops->errata)
209	        dev_priv->ops->errata(dev);
210
211        dev_priv->modeset = true;
212}
213
214void psb_modeset_cleanup(struct drm_device *dev)
215{
216	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
217	if (dev_priv->modeset) {
218		drm_kms_helper_poll_fini(dev);
219	}
220}