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- /* 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 <drm/drmP.h>
- #include <linux/kernel.h>
- #include <linux/platform_device.h>
- #include <linux/component.h>
- #include <linux/timer.h>
- #include <drm/exynos_drm.h>
- #include <drm/drm_edid.h>
- #include <drm/drm_crtc_helper.h>
- #include <drm/drm_atomic_helper.h>
- #include "exynos_drm_drv.h"
- #include "exynos_drm_crtc.h"
- #include "exynos_drm_fb.h"
- #include "exynos_drm_plane.h"
- #include "exynos_drm_vidi.h"
- /* VIDI uses fixed refresh rate of 50Hz */
- #define VIDI_REFRESH_TIME (1000 / 50)
- /* vidi has totally three virtual windows. */
- #define WINDOWS_NR 3
- #define ctx_from_connector(c) container_of(c, struct vidi_context, \
- connector)
- struct vidi_context {
- struct drm_encoder encoder;
- struct platform_device *pdev;
- struct drm_device *drm_dev;
- struct exynos_drm_crtc *crtc;
- struct drm_connector connector;
- struct exynos_drm_plane planes[WINDOWS_NR];
- struct edid *raw_edid;
- unsigned int clkdiv;
- unsigned int connected;
- bool suspended;
- struct timer_list timer;
- struct mutex lock;
- };
- static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
- {
- return container_of(e, struct vidi_context, encoder);
- }
- 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 const uint32_t formats[] = {
- DRM_FORMAT_XRGB8888,
- DRM_FORMAT_ARGB8888,
- DRM_FORMAT_NV12,
- };
- static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
- DRM_PLANE_TYPE_PRIMARY,
- DRM_PLANE_TYPE_OVERLAY,
- DRM_PLANE_TYPE_CURSOR,
- };
- static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
- {
- struct vidi_context *ctx = crtc->ctx;
- if (ctx->suspended)
- return -EPERM;
- mod_timer(&ctx->timer,
- jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
- return 0;
- }
- static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
- {
- }
- static void vidi_update_plane(struct exynos_drm_crtc *crtc,
- struct exynos_drm_plane *plane)
- {
- struct drm_plane_state *state = plane->base.state;
- struct vidi_context *ctx = crtc->ctx;
- dma_addr_t addr;
- if (ctx->suspended)
- return;
- addr = exynos_drm_fb_dma_addr(state->fb, 0);
- DRM_DEBUG_KMS("dma_addr = %pad\n", &addr);
- }
- static void vidi_enable(struct exynos_drm_crtc *crtc)
- {
- struct vidi_context *ctx = crtc->ctx;
- mutex_lock(&ctx->lock);
- ctx->suspended = false;
- mutex_unlock(&ctx->lock);
- drm_crtc_vblank_on(&crtc->base);
- }
- static void vidi_disable(struct exynos_drm_crtc *crtc)
- {
- struct vidi_context *ctx = crtc->ctx;
- drm_crtc_vblank_off(&crtc->base);
- mutex_lock(&ctx->lock);
- ctx->suspended = true;
- mutex_unlock(&ctx->lock);
- }
- static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
- .enable = vidi_enable,
- .disable = vidi_disable,
- .enable_vblank = vidi_enable_vblank,
- .disable_vblank = vidi_disable_vblank,
- .update_plane = vidi_update_plane,
- .atomic_flush = exynos_crtc_handle_event,
- };
- static void vidi_fake_vblank_timer(unsigned long arg)
- {
- struct vidi_context *ctx = (void *)arg;
- if (drm_crtc_handle_vblank(&ctx->crtc->base))
- mod_timer(&ctx->timer,
- jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
- }
- static ssize_t vidi_show_connection(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct vidi_context *ctx = dev_get_drvdata(dev);
- int rc;
- mutex_lock(&ctx->lock);
- rc = sprintf(buf, "%d\n", ctx->connected);
- mutex_unlock(&ctx->lock);
- return rc;
- }
- static ssize_t vidi_store_connection(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
- {
- struct vidi_context *ctx = dev_get_drvdata(dev);
- int ret;
- ret = kstrtoint(buf, 0, &ctx->connected);
- if (ret)
- return ret;
- if (ctx->connected > 1)
- return -EINVAL;
- /* use fake edid data for test. */
- if (!ctx->raw_edid)
- ctx->raw_edid = (struct edid *)fake_edid_info;
- /* if raw_edid isn't same as fake data then it can't be tested. */
- if (ctx->raw_edid != (struct edid *)fake_edid_info) {
- DRM_DEBUG_KMS("edid data is not fake data.\n");
- return -EINVAL;
- }
- DRM_DEBUG_KMS("requested connection.\n");
- drm_helper_hpd_irq_event(ctx->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 = dev_get_drvdata(drm_dev->dev);
- struct drm_exynos_vidi_connection *vidi = data;
- if (!vidi) {
- DRM_DEBUG_KMS("user data for vidi is null.\n");
- return -EINVAL;
- }
- if (vidi->connection > 1) {
- DRM_DEBUG_KMS("connection should be 0 or 1.\n");
- return -EINVAL;
- }
- if (ctx->connected == vidi->connection) {
- DRM_DEBUG_KMS("same connection request.\n");
- return -EINVAL;
- }
- if (vidi->connection) {
- struct edid *raw_edid;
- raw_edid = (struct edid *)(unsigned long)vidi->edid;
- if (!drm_edid_is_valid(raw_edid)) {
- DRM_DEBUG_KMS("edid data is invalid.\n");
- return -EINVAL;
- }
- ctx->raw_edid = drm_edid_duplicate(raw_edid);
- if (!ctx->raw_edid) {
- DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
- return -ENOMEM;
- }
- } else {
- /*
- * with connection = 0, free raw_edid
- * only if raw edid data isn't same as fake data.
- */
- if (ctx->raw_edid && ctx->raw_edid !=
- (struct edid *)fake_edid_info) {
- kfree(ctx->raw_edid);
- ctx->raw_edid = NULL;
- }
- }
- ctx->connected = vidi->connection;
- drm_helper_hpd_irq_event(ctx->drm_dev);
- return 0;
- }
- static enum drm_connector_status vidi_detect(struct drm_connector *connector,
- bool force)
- {
- struct vidi_context *ctx = ctx_from_connector(connector);
- /*
- * connection request would come from user side
- * to do hotplug through specific ioctl.
- */
- return ctx->connected ? connector_status_connected :
- connector_status_disconnected;
- }
- static void vidi_connector_destroy(struct drm_connector *connector)
- {
- }
- static const struct drm_connector_funcs vidi_connector_funcs = {
- .fill_modes = drm_helper_probe_single_connector_modes,
- .detect = vidi_detect,
- .destroy = vidi_connector_destroy,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
- };
- static int vidi_get_modes(struct drm_connector *connector)
- {
- struct vidi_context *ctx = ctx_from_connector(connector);
- struct edid *edid;
- int edid_len;
- /*
- * 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;
- }
- edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
- edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
- if (!edid) {
- DRM_DEBUG_KMS("failed to allocate edid\n");
- return -ENOMEM;
- }
- drm_mode_connector_update_edid_property(connector, edid);
- return drm_add_edid_modes(connector, edid);
- }
- static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
- .get_modes = vidi_get_modes,
- };
- static int vidi_create_connector(struct drm_encoder *encoder)
- {
- struct vidi_context *ctx = encoder_to_vidi(encoder);
- struct drm_connector *connector = &ctx->connector;
- int ret;
- connector->polled = DRM_CONNECTOR_POLL_HPD;
- ret = drm_connector_init(ctx->drm_dev, connector,
- &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
- if (ret) {
- DRM_ERROR("Failed to initialize connector with drm\n");
- return ret;
- }
- drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
- drm_mode_connector_attach_encoder(connector, encoder);
- return 0;
- }
- static void exynos_vidi_mode_set(struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
- {
- }
- static void exynos_vidi_enable(struct drm_encoder *encoder)
- {
- }
- static void exynos_vidi_disable(struct drm_encoder *encoder)
- {
- }
- static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
- .mode_set = exynos_vidi_mode_set,
- .enable = exynos_vidi_enable,
- .disable = exynos_vidi_disable,
- };
- static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
- .destroy = drm_encoder_cleanup,
- };
- static int vidi_bind(struct device *dev, struct device *master, void *data)
- {
- struct vidi_context *ctx = dev_get_drvdata(dev);
- struct drm_device *drm_dev = data;
- struct drm_encoder *encoder = &ctx->encoder;
- struct exynos_drm_plane *exynos_plane;
- struct exynos_drm_plane_config plane_config = { 0 };
- unsigned int i;
- int ret;
- ctx->drm_dev = drm_dev;
- plane_config.pixel_formats = formats;
- plane_config.num_pixel_formats = ARRAY_SIZE(formats);
- for (i = 0; i < WINDOWS_NR; i++) {
- plane_config.zpos = i;
- plane_config.type = vidi_win_types[i];
- ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
- &plane_config);
- if (ret)
- return ret;
- }
- exynos_plane = &ctx->planes[DEFAULT_WIN];
- ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
- EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);
- if (IS_ERR(ctx->crtc)) {
- DRM_ERROR("failed to create crtc.\n");
- return PTR_ERR(ctx->crtc);
- }
- drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
- DRM_MODE_ENCODER_TMDS, NULL);
- drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
- ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
- if (ret < 0)
- return ret;
- ret = vidi_create_connector(encoder);
- if (ret) {
- DRM_ERROR("failed to create connector ret = %d\n", ret);
- drm_encoder_cleanup(encoder);
- return ret;
- }
- return 0;
- }
- static void vidi_unbind(struct device *dev, struct device *master, void *data)
- {
- struct vidi_context *ctx = dev_get_drvdata(dev);
- del_timer_sync(&ctx->timer);
- }
- static const struct component_ops vidi_component_ops = {
- .bind = vidi_bind,
- .unbind = vidi_unbind,
- };
- static int vidi_probe(struct platform_device *pdev)
- {
- struct vidi_context *ctx;
- int ret;
- ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
- if (!ctx)
- return -ENOMEM;
- ctx->pdev = pdev;
- setup_timer(&ctx->timer, vidi_fake_vblank_timer, (unsigned long)ctx);
- mutex_init(&ctx->lock);
- platform_set_drvdata(pdev, ctx);
- ret = device_create_file(&pdev->dev, &dev_attr_connection);
- if (ret < 0) {
- DRM_ERROR("failed to create connection sysfs.\n");
- return ret;
- }
- ret = component_add(&pdev->dev, &vidi_component_ops);
- if (ret)
- goto err_remove_file;
- return ret;
- err_remove_file:
- device_remove_file(&pdev->dev, &dev_attr_connection);
- return ret;
- }
- static int vidi_remove(struct platform_device *pdev)
- {
- struct vidi_context *ctx = platform_get_drvdata(pdev);
- if (ctx->raw_edid != (struct edid *)fake_edid_info) {
- kfree(ctx->raw_edid);
- ctx->raw_edid = NULL;
- return -EINVAL;
- }
- component_del(&pdev->dev, &vidi_component_ops);
- return 0;
- }
- struct platform_driver vidi_driver = {
- .probe = vidi_probe,
- .remove = vidi_remove,
- .driver = {
- .name = "exynos-drm-vidi",
- .owner = THIS_MODULE,
- },
- };
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