+++ /dev/null
-/*
- * Freescale i.MX drm driver
- *
- * Copyright (C) 2011 Sascha Hauer, Pengutronix
- *
- * 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.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-#include <linux/component.h>
-#include <linux/device.h>
-#include <linux/fb.h>
-#include <linux/module.h>
-#include <linux/of_graph.h>
-#include <linux/platform_device.h>
-#include <drm/drmP.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_fb_cma_helper.h>
-#include <drm/drm_plane_helper.h>
-
-#include "imx-drm.h"
-
-#define MAX_CRTC 4
-
-struct imx_drm_crtc;
-
-struct imx_drm_component {
- struct device_node *of_node;
- struct list_head list;
-};
-
-struct imx_drm_device {
- struct drm_device *drm;
- struct imx_drm_crtc *crtc[MAX_CRTC];
- int pipes;
- struct drm_fbdev_cma *fbhelper;
-};
-
-struct imx_drm_crtc {
- struct drm_crtc *crtc;
- int pipe;
- struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
- struct device_node *port;
-};
-
-static int legacyfb_depth = 16;
-module_param(legacyfb_depth, int, 0444);
-
-int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
-{
- return crtc->pipe;
-}
-EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
-
-static void imx_drm_driver_lastclose(struct drm_device *drm)
-{
-#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
- struct imx_drm_device *imxdrm = drm->dev_private;
-
- if (imxdrm->fbhelper)
- drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
-#endif
-}
-
-static int imx_drm_driver_unload(struct drm_device *drm)
-{
-#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
- struct imx_drm_device *imxdrm = drm->dev_private;
-#endif
-
- drm_kms_helper_poll_fini(drm);
-
-#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
- if (imxdrm->fbhelper)
- drm_fbdev_cma_fini(imxdrm->fbhelper);
-#endif
-
- component_unbind_all(drm->dev, drm);
-
- drm_vblank_cleanup(drm);
- drm_mode_config_cleanup(drm);
-
- platform_set_drvdata(drm->platformdev, NULL);
-
- return 0;
-}
-
-static struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc)
-{
- struct imx_drm_device *imxdrm = crtc->dev->dev_private;
- unsigned i;
-
- for (i = 0; i < MAX_CRTC; i++)
- if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc)
- return imxdrm->crtc[i];
-
- return NULL;
-}
-
-int imx_drm_panel_format_pins(struct drm_encoder *encoder,
- u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
-{
- struct imx_drm_crtc_helper_funcs *helper;
- struct imx_drm_crtc *imx_crtc;
-
- imx_crtc = imx_drm_find_crtc(encoder->crtc);
- if (!imx_crtc)
- return -EINVAL;
-
- helper = &imx_crtc->imx_drm_helper_funcs;
- if (helper->set_interface_pix_fmt)
- return helper->set_interface_pix_fmt(encoder->crtc,
- encoder->encoder_type, interface_pix_fmt,
- hsync_pin, vsync_pin);
- return 0;
-}
-EXPORT_SYMBOL_GPL(imx_drm_panel_format_pins);
-
-int imx_drm_panel_format(struct drm_encoder *encoder, u32 interface_pix_fmt)
-{
- return imx_drm_panel_format_pins(encoder, interface_pix_fmt, 2, 3);
-}
-EXPORT_SYMBOL_GPL(imx_drm_panel_format);
-
-int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
-{
- return drm_vblank_get(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
-}
-EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
-
-void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
-{
- drm_vblank_put(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
-}
-EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
-
-void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
-{
- drm_handle_vblank(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
-}
-EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
-
-static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
-{
- struct imx_drm_device *imxdrm = drm->dev_private;
- struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc];
- int ret;
-
- if (!imx_drm_crtc)
- return -EINVAL;
-
- if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
- return -ENOSYS;
-
- ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
- imx_drm_crtc->crtc);
-
- return ret;
-}
-
-static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
-{
- struct imx_drm_device *imxdrm = drm->dev_private;
- struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc];
-
- if (!imx_drm_crtc)
- return;
-
- if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
- return;
-
- imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
-}
-
-static void imx_drm_driver_preclose(struct drm_device *drm,
- struct drm_file *file)
-{
- int i;
-
- if (!file->is_master)
- return;
-
- for (i = 0; i < MAX_CRTC; i++)
- imx_drm_disable_vblank(drm, i);
-}
-
-static const struct file_operations imx_drm_driver_fops = {
- .owner = THIS_MODULE,
- .open = drm_open,
- .release = drm_release,
- .unlocked_ioctl = drm_ioctl,
- .mmap = drm_gem_cma_mmap,
- .poll = drm_poll,
- .read = drm_read,
- .llseek = noop_llseek,
-};
-
-void imx_drm_connector_destroy(struct drm_connector *connector)
-{
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
-}
-EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
-
-void imx_drm_encoder_destroy(struct drm_encoder *encoder)
-{
- drm_encoder_cleanup(encoder);
-}
-EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
-
-static void imx_drm_output_poll_changed(struct drm_device *drm)
-{
-#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
- struct imx_drm_device *imxdrm = drm->dev_private;
-
- drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
-#endif
-}
-
-static struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
- .fb_create = drm_fb_cma_create,
- .output_poll_changed = imx_drm_output_poll_changed,
-};
-
-/*
- * Main DRM initialisation. This binds, initialises and registers
- * with DRM the subcomponents of the driver.
- */
-static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
-{
- struct imx_drm_device *imxdrm;
- struct drm_connector *connector;
- int ret;
-
- imxdrm = devm_kzalloc(drm->dev, sizeof(*imxdrm), GFP_KERNEL);
- if (!imxdrm)
- return -ENOMEM;
-
- imxdrm->drm = drm;
-
- drm->dev_private = imxdrm;
-
- /*
- * enable drm irq mode.
- * - with irq_enabled = true, 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 and
- * drivers can well take care of their interrupts
- */
- drm->irq_enabled = true;
-
- /*
- * set max width and height as default value(4096x4096).
- * this value would be used to check framebuffer size limitation
- * at drm_mode_addfb().
- */
- drm->mode_config.min_width = 64;
- drm->mode_config.min_height = 64;
- drm->mode_config.max_width = 4096;
- drm->mode_config.max_height = 4096;
- drm->mode_config.funcs = &imx_drm_mode_config_funcs;
-
- drm_mode_config_init(drm);
-
- ret = drm_vblank_init(drm, MAX_CRTC);
- if (ret)
- goto err_kms;
-
- /*
- * with vblank_disable_allowed = true, 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->vblank_disable_allowed = true;
-
- platform_set_drvdata(drm->platformdev, drm);
-
- /* Now try and bind all our sub-components */
- ret = component_bind_all(drm->dev, drm);
- if (ret)
- goto err_vblank;
-
- /*
- * All components are now added, we can publish the connector sysfs
- * entries to userspace. This will generate hotplug events and so
- * userspace will expect to be able to access DRM at this point.
- */
- list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
- ret = drm_connector_register(connector);
- if (ret) {
- dev_err(drm->dev,
- "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
- connector->base.id,
- connector->name, ret);
- goto err_unbind;
- }
- }
-
- /*
- * All components are now initialised, so setup the fb helper.
- * The fb helper takes copies of key hardware information, so the
- * crtcs/connectors/encoders must not change after this point.
- */
-#if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
- if (legacyfb_depth != 16 && legacyfb_depth != 32) {
- dev_warn(drm->dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
- legacyfb_depth = 16;
- }
- imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
- drm->mode_config.num_crtc, MAX_CRTC);
- if (IS_ERR(imxdrm->fbhelper)) {
- ret = PTR_ERR(imxdrm->fbhelper);
- imxdrm->fbhelper = NULL;
- goto err_unbind;
- }
-#endif
-
- drm_kms_helper_poll_init(drm);
-
- return 0;
-
-err_unbind:
- component_unbind_all(drm->dev, drm);
-err_vblank:
- drm_vblank_cleanup(drm);
-err_kms:
- drm_mode_config_cleanup(drm);
-
- return ret;
-}
-
-/*
- * imx_drm_add_crtc - add a new crtc
- */
-int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
- struct imx_drm_crtc **new_crtc,
- const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
- struct device_node *port)
-{
- struct imx_drm_device *imxdrm = drm->dev_private;
- struct imx_drm_crtc *imx_drm_crtc;
- int ret;
-
- /*
- * The vblank arrays are dimensioned by MAX_CRTC - we can't
- * pass IDs greater than this to those functions.
- */
- if (imxdrm->pipes >= MAX_CRTC)
- return -EINVAL;
-
- if (imxdrm->drm->open_count)
- return -EBUSY;
-
- imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
- if (!imx_drm_crtc)
- return -ENOMEM;
-
- imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
- imx_drm_crtc->pipe = imxdrm->pipes++;
- imx_drm_crtc->port = port;
- imx_drm_crtc->crtc = crtc;
-
- imxdrm->crtc[imx_drm_crtc->pipe] = imx_drm_crtc;
-
- *new_crtc = imx_drm_crtc;
-
- ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
- if (ret)
- goto err_register;
-
- drm_crtc_helper_add(crtc,
- imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
-
- drm_crtc_init(drm, crtc,
- imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
-
- return 0;
-
-err_register:
- imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
- kfree(imx_drm_crtc);
- return ret;
-}
-EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
-
-/*
- * imx_drm_remove_crtc - remove a crtc
- */
-int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
-{
- struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
-
- drm_crtc_cleanup(imx_drm_crtc->crtc);
-
- imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
-
- kfree(imx_drm_crtc);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
-
-/*
- * Find the DRM CRTC possible mask for the connected endpoint.
- *
- * The encoder possible masks are defined by their position in the
- * mode_config crtc_list. This means that CRTCs must not be added
- * or removed once the DRM device has been fully initialised.
- */
-static uint32_t imx_drm_find_crtc_mask(struct imx_drm_device *imxdrm,
- struct device_node *endpoint)
-{
- struct device_node *port;
- unsigned i;
-
- port = of_graph_get_remote_port(endpoint);
- if (!port)
- return 0;
- of_node_put(port);
-
- for (i = 0; i < MAX_CRTC; i++) {
- struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[i];
-
- if (imx_drm_crtc && imx_drm_crtc->port == port)
- return drm_crtc_mask(imx_drm_crtc->crtc);
- }
-
- return 0;
-}
-
-static struct device_node *imx_drm_of_get_next_endpoint(
- const struct device_node *parent, struct device_node *prev)
-{
- struct device_node *node = of_graph_get_next_endpoint(parent, prev);
-
- of_node_put(prev);
- return node;
-}
-
-int imx_drm_encoder_parse_of(struct drm_device *drm,
- struct drm_encoder *encoder, struct device_node *np)
-{
- struct imx_drm_device *imxdrm = drm->dev_private;
- struct device_node *ep = NULL;
- uint32_t crtc_mask = 0;
- int i;
-
- for (i = 0; ; i++) {
- u32 mask;
-
- ep = imx_drm_of_get_next_endpoint(np, ep);
- if (!ep)
- break;
-
- mask = imx_drm_find_crtc_mask(imxdrm, ep);
-
- /*
- * If we failed to find the CRTC(s) which this encoder is
- * supposed to be connected to, it's because the CRTC has
- * not been registered yet. Defer probing, and hope that
- * the required CRTC is added later.
- */
- if (mask == 0)
- return -EPROBE_DEFER;
-
- crtc_mask |= mask;
- }
-
- of_node_put(ep);
- if (i == 0)
- return -ENOENT;
-
- encoder->possible_crtcs = crtc_mask;
-
- /* FIXME: this is the mask of outputs which can clone this output. */
- encoder->possible_clones = ~0;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
-
-/*
- * @node: device tree node containing encoder input ports
- * @encoder: drm_encoder
- */
-int imx_drm_encoder_get_mux_id(struct device_node *node,
- struct drm_encoder *encoder)
-{
- struct imx_drm_crtc *imx_crtc = imx_drm_find_crtc(encoder->crtc);
- struct device_node *ep = NULL;
- struct of_endpoint endpoint;
- struct device_node *port;
- int ret;
-
- if (!node || !imx_crtc)
- return -EINVAL;
-
- do {
- ep = imx_drm_of_get_next_endpoint(node, ep);
- if (!ep)
- break;
-
- port = of_graph_get_remote_port(ep);
- of_node_put(port);
- if (port == imx_crtc->port) {
- ret = of_graph_parse_endpoint(ep, &endpoint);
- return ret ? ret : endpoint.port;
- }
- } while (ep);
-
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
-
-static const struct drm_ioctl_desc imx_drm_ioctls[] = {
- /* none so far */
-};
-
-static struct drm_driver imx_drm_driver = {
- .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
- .load = imx_drm_driver_load,
- .unload = imx_drm_driver_unload,
- .lastclose = imx_drm_driver_lastclose,
- .preclose = imx_drm_driver_preclose,
- .set_busid = drm_platform_set_busid,
- .gem_free_object = drm_gem_cma_free_object,
- .gem_vm_ops = &drm_gem_cma_vm_ops,
- .dumb_create = drm_gem_cma_dumb_create,
- .dumb_map_offset = drm_gem_cma_dumb_map_offset,
- .dumb_destroy = drm_gem_dumb_destroy,
-
- .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
- .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_prime_import = drm_gem_prime_import,
- .gem_prime_export = drm_gem_prime_export,
- .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
- .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
- .gem_prime_vmap = drm_gem_cma_prime_vmap,
- .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
- .gem_prime_mmap = drm_gem_cma_prime_mmap,
- .get_vblank_counter = drm_vblank_count,
- .enable_vblank = imx_drm_enable_vblank,
- .disable_vblank = imx_drm_disable_vblank,
- .ioctls = imx_drm_ioctls,
- .num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
- .fops = &imx_drm_driver_fops,
- .name = "imx-drm",
- .desc = "i.MX DRM graphics",
- .date = "20120507",
- .major = 1,
- .minor = 0,
- .patchlevel = 0,
-};
-
-static int compare_of(struct device *dev, void *data)
-{
- struct device_node *np = data;
-
- /* Special case for LDB, one device for two channels */
- if (of_node_cmp(np->name, "lvds-channel") == 0) {
- np = of_get_parent(np);
- of_node_put(np);
- }
-
- return dev->of_node == np;
-}
-
-static int imx_drm_bind(struct device *dev)
-{
- return drm_platform_init(&imx_drm_driver, to_platform_device(dev));
-}
-
-static void imx_drm_unbind(struct device *dev)
-{
- drm_put_dev(dev_get_drvdata(dev));
-}
-
-static const struct component_master_ops imx_drm_ops = {
- .bind = imx_drm_bind,
- .unbind = imx_drm_unbind,
-};
-
-static int imx_drm_platform_probe(struct platform_device *pdev)
-{
- struct device_node *ep, *port, *remote;
- struct component_match *match = NULL;
- int ret;
- int i;
-
- /*
- * Bind the IPU display interface ports first, so that
- * imx_drm_encoder_parse_of called from encoder .bind callbacks
- * works as expected.
- */
- for (i = 0; ; i++) {
- port = of_parse_phandle(pdev->dev.of_node, "ports", i);
- if (!port)
- break;
-
- component_match_add(&pdev->dev, &match, compare_of, port);
- }
-
- if (i == 0) {
- dev_err(&pdev->dev, "missing 'ports' property\n");
- return -ENODEV;
- }
-
- /* Then bind all encoders */
- for (i = 0; ; i++) {
- port = of_parse_phandle(pdev->dev.of_node, "ports", i);
- if (!port)
- break;
-
- for_each_child_of_node(port, ep) {
- remote = of_graph_get_remote_port_parent(ep);
- if (!remote || !of_device_is_available(remote)) {
- of_node_put(remote);
- continue;
- } else if (!of_device_is_available(remote->parent)) {
- dev_warn(&pdev->dev, "parent device of %s is not available\n",
- remote->full_name);
- of_node_put(remote);
- continue;
- }
-
- component_match_add(&pdev->dev, &match, compare_of, remote);
- of_node_put(remote);
- }
- of_node_put(port);
- }
-
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
- if (ret)
- return ret;
-
- return component_master_add_with_match(&pdev->dev, &imx_drm_ops, match);
-}
-
-static int imx_drm_platform_remove(struct platform_device *pdev)
-{
- component_master_del(&pdev->dev, &imx_drm_ops);
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int imx_drm_suspend(struct device *dev)
-{
- struct drm_device *drm_dev = dev_get_drvdata(dev);
-
- /* The drm_dev is NULL before .load hook is called */
- if (drm_dev == NULL)
- return 0;
-
- drm_kms_helper_poll_disable(drm_dev);
-
- return 0;
-}
-
-static int imx_drm_resume(struct device *dev)
-{
- struct drm_device *drm_dev = dev_get_drvdata(dev);
-
- if (drm_dev == NULL)
- return 0;
-
- drm_helper_resume_force_mode(drm_dev);
- drm_kms_helper_poll_enable(drm_dev);
-
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
-
-static const struct of_device_id imx_drm_dt_ids[] = {
- { .compatible = "fsl,imx-display-subsystem", },
- { /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
-
-static struct platform_driver imx_drm_pdrv = {
- .probe = imx_drm_platform_probe,
- .remove = imx_drm_platform_remove,
- .driver = {
- .owner = THIS_MODULE,
- .name = "imx-drm",
- .pm = &imx_drm_pm_ops,
- .of_match_table = imx_drm_dt_ids,
- },
-};
-module_platform_driver(imx_drm_pdrv);
-
-MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
-MODULE_DESCRIPTION("i.MX drm driver core");
-MODULE_LICENSE("GPL");
projects / linux-2.6-microblaze.git / blobdiff