--- /dev/null
+/* exynos_drm_vidi.c
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ * Authors:
+ * Inki Dae <inki.dae@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include "drmP.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/exynos_drm.h>
+
+#include "drm_edid.h"
+#include "drm_crtc_helper.h"
+
+#include "exynos_drm_drv.h"
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_encoder.h"
+
+/* vidi has totally three virtual windows. */
+#define WINDOWS_NR 3
+
+#define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
+
+struct vidi_win_data {
+ unsigned int offset_x;
+ unsigned int offset_y;
+ unsigned int ovl_width;
+ unsigned int ovl_height;
+ unsigned int fb_width;
+ unsigned int fb_height;
+ unsigned int bpp;
+ dma_addr_t dma_addr;
+ void __iomem *vaddr;
+ unsigned int buf_offsize;
+ unsigned int line_size; /* bytes */
+ bool enabled;
+};
+
+struct vidi_context {
+ struct exynos_drm_subdrv subdrv;
+ struct drm_crtc *crtc;
+ struct vidi_win_data win_data[WINDOWS_NR];
+ struct edid *raw_edid;
+ unsigned int clkdiv;
+ unsigned int default_win;
+ unsigned long irq_flags;
+ unsigned int connected;
+ bool vblank_on;
+ bool suspended;
+ struct work_struct work;
+ struct mutex lock;
+};
+
+static const char fake_edid_info[] = {
+ 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
+ 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
+ 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
+ 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
+ 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
+ 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
+ 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
+ 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
+ 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
+ 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
+ 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
+ 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
+ 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
+ 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
+ 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
+ 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x06
+};
+
+static void vidi_fake_vblank_handler(struct work_struct *work);
+
+static bool vidi_display_is_connected(struct device *dev)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * connection request would come from user side
+ * to do hotplug through specific ioctl.
+ */
+ return ctx->connected ? true : false;
+}
+
+static int vidi_get_edid(struct device *dev, struct drm_connector *connector,
+ u8 *edid, int len)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+ struct edid *raw_edid;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * the edid data comes from user side and it would be set
+ * to ctx->raw_edid through specific ioctl.
+ */
+ if (!ctx->raw_edid) {
+ DRM_DEBUG_KMS("raw_edid is null.\n");
+ return -EFAULT;
+ }
+
+ raw_edid = kzalloc(len, GFP_KERNEL);
+ if (!raw_edid) {
+ DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
+ return -ENOMEM;
+ }
+
+ memcpy(raw_edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
+ * EDID_LENGTH, len));
+
+ /* attach the edid data to connector. */
+ connector->display_info.raw_edid = (char *)raw_edid;
+
+ memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
+ * EDID_LENGTH, len));
+
+ return 0;
+}
+
+static void *vidi_get_panel(struct device *dev)
+{
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+
+ return NULL;
+}
+
+static int vidi_check_timing(struct device *dev, void *timing)
+{
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+
+ return 0;
+}
+
+static int vidi_display_power_on(struct device *dev, int mode)
+{
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO */
+
+ return 0;
+}
+
+static struct exynos_drm_display_ops vidi_display_ops = {
+ .type = EXYNOS_DISPLAY_TYPE_VIDI,
+ .is_connected = vidi_display_is_connected,
+ .get_edid = vidi_get_edid,
+ .get_panel = vidi_get_panel,
+ .check_timing = vidi_check_timing,
+ .power_on = vidi_display_power_on,
+};
+
+static void vidi_dpms(struct device *subdrv_dev, int mode)
+{
+ struct vidi_context *ctx = get_vidi_context(subdrv_dev);
+
+ DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
+
+ mutex_lock(&ctx->lock);
+
+ switch (mode) {
+ case DRM_MODE_DPMS_ON:
+ /* TODO. */
+ break;
+ case DRM_MODE_DPMS_STANDBY:
+ case DRM_MODE_DPMS_SUSPEND:
+ case DRM_MODE_DPMS_OFF:
+ /* TODO. */
+ break;
+ default:
+ DRM_DEBUG_KMS("unspecified mode %d\n", mode);
+ break;
+ }
+
+ mutex_unlock(&ctx->lock);
+}
+
+static void vidi_apply(struct device *subdrv_dev)
+{
+ struct vidi_context *ctx = get_vidi_context(subdrv_dev);
+ struct exynos_drm_manager *mgr = &ctx->subdrv.manager;
+ struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
+ struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
+ struct vidi_win_data *win_data;
+ int i;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ for (i = 0; i < WINDOWS_NR; i++) {
+ win_data = &ctx->win_data[i];
+ if (win_data->enabled && (ovl_ops && ovl_ops->commit))
+ ovl_ops->commit(subdrv_dev, i);
+ }
+
+ if (mgr_ops && mgr_ops->commit)
+ mgr_ops->commit(subdrv_dev);
+}
+
+static void vidi_commit(struct device *dev)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (ctx->suspended)
+ return;
+}
+
+static int vidi_enable_vblank(struct device *dev)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (ctx->suspended)
+ return -EPERM;
+
+ if (!test_and_set_bit(0, &ctx->irq_flags))
+ ctx->vblank_on = true;
+
+ return 0;
+}
+
+static void vidi_disable_vblank(struct device *dev)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (ctx->suspended)
+ return;
+
+ if (test_and_clear_bit(0, &ctx->irq_flags))
+ ctx->vblank_on = false;
+}
+
+static struct exynos_drm_manager_ops vidi_manager_ops = {
+ .dpms = vidi_dpms,
+ .apply = vidi_apply,
+ .commit = vidi_commit,
+ .enable_vblank = vidi_enable_vblank,
+ .disable_vblank = vidi_disable_vblank,
+};
+
+static void vidi_win_mode_set(struct device *dev,
+ struct exynos_drm_overlay *overlay)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+ struct vidi_win_data *win_data;
+ int win;
+ unsigned long offset;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (!overlay) {
+ dev_err(dev, "overlay is NULL\n");
+ return;
+ }
+
+ win = overlay->zpos;
+ if (win == DEFAULT_ZPOS)
+ win = ctx->default_win;
+
+ if (win < 0 || win > WINDOWS_NR)
+ return;
+
+ offset = overlay->fb_x * (overlay->bpp >> 3);
+ offset += overlay->fb_y * overlay->pitch;
+
+ DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
+
+ win_data = &ctx->win_data[win];
+
+ win_data->offset_x = overlay->crtc_x;
+ win_data->offset_y = overlay->crtc_y;
+ win_data->ovl_width = overlay->crtc_width;
+ win_data->ovl_height = overlay->crtc_height;
+ win_data->fb_width = overlay->fb_width;
+ win_data->fb_height = overlay->fb_height;
+ win_data->dma_addr = overlay->dma_addr[0] + offset;
+ win_data->vaddr = overlay->vaddr[0] + offset;
+ win_data->bpp = overlay->bpp;
+ win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
+ (overlay->bpp >> 3);
+ win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
+
+ /*
+ * some parts of win_data should be transferred to user side
+ * through specific ioctl.
+ */
+
+ DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
+ win_data->offset_x, win_data->offset_y);
+ DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
+ win_data->ovl_width, win_data->ovl_height);
+ DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
+ (unsigned long)win_data->dma_addr,
+ (unsigned long)win_data->vaddr);
+ DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
+ overlay->fb_width, overlay->crtc_width);
+}
+
+static void vidi_win_commit(struct device *dev, int zpos)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+ struct vidi_win_data *win_data;
+ int win = zpos;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (ctx->suspended)
+ return;
+
+ if (win == DEFAULT_ZPOS)
+ win = ctx->default_win;
+
+ if (win < 0 || win > WINDOWS_NR)
+ return;
+
+ win_data = &ctx->win_data[win];
+
+ win_data->enabled = true;
+
+ DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
+
+ if (ctx->vblank_on)
+ schedule_work(&ctx->work);
+}
+
+static void vidi_win_disable(struct device *dev, int zpos)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+ struct vidi_win_data *win_data;
+ int win = zpos;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (win == DEFAULT_ZPOS)
+ win = ctx->default_win;
+
+ if (win < 0 || win > WINDOWS_NR)
+ return;
+
+ win_data = &ctx->win_data[win];
+ win_data->enabled = false;
+
+ /* TODO. */
+}
+
+static struct exynos_drm_overlay_ops vidi_overlay_ops = {
+ .mode_set = vidi_win_mode_set,
+ .commit = vidi_win_commit,
+ .disable = vidi_win_disable,
+};
+
+static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc)
+{
+ struct exynos_drm_private *dev_priv = drm_dev->dev_private;
+ struct drm_pending_vblank_event *e, *t;
+ struct timeval now;
+ unsigned long flags;
+ bool is_checked = false;
+
+ spin_lock_irqsave(&drm_dev->event_lock, flags);
+
+ list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
+ base.link) {
+ /* if event's pipe isn't same as crtc then ignore it. */
+ if (crtc != e->pipe)
+ continue;
+
+ is_checked = true;
+
+ do_gettimeofday(&now);
+ e->event.sequence = 0;
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+
+ list_move_tail(&e->base.link, &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ }
+
+ if (is_checked) {
+ /*
+ * call drm_vblank_put only in case that drm_vblank_get was
+ * called.
+ */
+ if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0)
+ drm_vblank_put(drm_dev, crtc);
+
+ /*
+ * don't off vblank if vblank_disable_allowed is 1,
+ * because vblank would be off by timer handler.
+ */
+ if (!drm_dev->vblank_disable_allowed)
+ drm_vblank_off(drm_dev, crtc);
+ }
+
+ spin_unlock_irqrestore(&drm_dev->event_lock, flags);
+}
+
+static void vidi_fake_vblank_handler(struct work_struct *work)
+{
+ struct vidi_context *ctx = container_of(work, struct vidi_context,
+ work);
+ struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
+ struct exynos_drm_manager *manager = &subdrv->manager;
+
+ if (manager->pipe < 0)
+ return;
+
+ /* refresh rate is about 50Hz. */
+ usleep_range(16000, 20000);
+
+ drm_handle_vblank(subdrv->drm_dev, manager->pipe);
+ vidi_finish_pageflip(subdrv->drm_dev, manager->pipe);
+}
+
+static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
+{
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * enable drm irq mode.
+ * - with irq_enabled = 1, we can use the vblank feature.
+ *
+ * P.S. note that we wouldn't use drm irq handler but
+ * just specific driver own one instead because
+ * drm framework supports only one irq handler.
+ */
+ drm_dev->irq_enabled = 1;
+
+ /*
+ * with vblank_disable_allowed = 1, vblank interrupt will be disabled
+ * by drm timer once a current process gives up ownership of
+ * vblank event.(after drm_vblank_put function is called)
+ */
+ drm_dev->vblank_disable_allowed = 1;
+
+ return 0;
+}
+
+static void vidi_subdrv_remove(struct drm_device *drm_dev)
+{
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /* TODO. */
+}
+
+static int vidi_power_on(struct vidi_context *ctx, bool enable)
+{
+ struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
+ struct device *dev = subdrv->manager.dev;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (enable != false && enable != true)
+ return -EINVAL;
+
+ if (enable) {
+ ctx->suspended = false;
+
+ /* if vblank was enabled status, enable it again. */
+ if (test_and_clear_bit(0, &ctx->irq_flags))
+ vidi_enable_vblank(dev);
+
+ vidi_apply(dev);
+ } else {
+ ctx->suspended = true;
+ }
+
+ return 0;
+}
+
+static int vidi_show_connection(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int rc;
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ mutex_lock(&ctx->lock);
+
+ rc = sprintf(buf, "%d\n", ctx->connected);
+
+ mutex_unlock(&ctx->lock);
+
+ return rc;
+}
+
+static int vidi_store_connection(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+ int ret;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ ret = kstrtoint(buf, 0, &ctx->connected);
+ if (ret)
+ return ret;
+
+ if (ctx->connected > 1)
+ return -EINVAL;
+
+ DRM_DEBUG_KMS("requested connection.\n");
+
+ drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
+
+ return len;
+}
+
+static DEVICE_ATTR(connection, 0644, vidi_show_connection,
+ vidi_store_connection);
+
+int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct vidi_context *ctx = NULL;
+ struct drm_encoder *encoder;
+ struct exynos_drm_manager *manager;
+ struct exynos_drm_display_ops *display_ops;
+ struct drm_exynos_vidi_connection *vidi = data;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (!vidi) {
+ DRM_DEBUG_KMS("user data for vidi is null.\n");
+ return -EINVAL;
+ }
+
+ if (!vidi->edid) {
+ DRM_DEBUG_KMS("edid data is null.\n");
+ return -EINVAL;
+ }
+
+ if (vidi->connection > 1) {
+ DRM_DEBUG_KMS("connection should be 0 or 1.\n");
+ return -EINVAL;
+ }
+
+ list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
+ head) {
+ manager = exynos_drm_get_manager(encoder);
+ display_ops = manager->display_ops;
+
+ if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
+ ctx = get_vidi_context(manager->dev);
+ break;
+ }
+ }
+
+ if (!ctx) {
+ DRM_DEBUG_KMS("not found virtual device type encoder.\n");
+ return -EINVAL;
+ }
+
+ if (ctx->connected == vidi->connection) {
+ DRM_DEBUG_KMS("same connection request.\n");
+ return -EINVAL;
+ }
+
+ if (vidi->connection)
+ ctx->raw_edid = (struct edid *)vidi->edid;
+
+ ctx->connected = vidi->connection;
+ drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
+
+ return 0;
+}
+
+static int __devinit vidi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct vidi_context *ctx;
+ struct exynos_drm_subdrv *subdrv;
+ int ret;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->default_win = 0;
+
+ INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
+
+ /* for test */
+ ctx->raw_edid = (struct edid *)fake_edid_info;
+
+ subdrv = &ctx->subdrv;
+ subdrv->probe = vidi_subdrv_probe;
+ subdrv->remove = vidi_subdrv_remove;
+ subdrv->manager.pipe = -1;
+ subdrv->manager.ops = &vidi_manager_ops;
+ subdrv->manager.overlay_ops = &vidi_overlay_ops;
+ subdrv->manager.display_ops = &vidi_display_ops;
+ subdrv->manager.dev = dev;
+
+ mutex_init(&ctx->lock);
+
+ platform_set_drvdata(pdev, ctx);
+
+ ret = device_create_file(&pdev->dev, &dev_attr_connection);
+ if (ret < 0)
+ DRM_INFO("failed to create connection sysfs.\n");
+
+ exynos_drm_subdrv_register(subdrv);
+
+ return 0;
+}
+
+static int __devexit vidi_remove(struct platform_device *pdev)
+{
+ struct vidi_context *ctx = platform_get_drvdata(pdev);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ exynos_drm_subdrv_unregister(&ctx->subdrv);
+
+ kfree(ctx);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int vidi_suspend(struct device *dev)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ return vidi_power_on(ctx, false);
+}
+
+static int vidi_resume(struct device *dev)
+{
+ struct vidi_context *ctx = get_vidi_context(dev);
+
+ return vidi_power_on(ctx, true);
+}
+#endif
+
+static const struct dev_pm_ops vidi_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
+};
+
+struct platform_driver vidi_driver = {
+ .probe = vidi_probe,
+ .remove = __devexit_p(vidi_remove),
+ .driver = {
+ .name = "exynos-drm-vidi",
+ .owner = THIS_MODULE,
+ .pm = &vidi_pm_ops,
+ },
+};
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff