diff options
Diffstat (limited to 'drivers/gpu/drm/mxsfb/mxsfb_drv.c')
| -rw-r--r-- | drivers/gpu/drm/mxsfb/mxsfb_drv.c | 644 |
1 files changed, 644 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c new file mode 100644 index 000000000000..96536bf0ef2d --- /dev/null +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c @@ -0,0 +1,644 @@ +/* + * Copyright (C) 2016 Marek Vasut <marex@denx.de> + * + * This code is based on drivers/video/fbdev/mxsfb.c : + * Copyright (C) 2010 Juergen Beisert, Pengutronix + * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved. + * + * 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/module.h> +#include <linux/spinlock.h> +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/list.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/of_reserved_mem.h> +#include <linux/pm_runtime.h> +#include <linux/reservation.h> +#include <linux/version.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_of.h> +#include <drm/drm_panel.h> +#include <drm/drm_simple_kms_helper.h> + +#include "mxsfb_drv.h" +#include "mxsfb_regs.h" + +/* The eLCDIF max possible CRTCs */ +#define MAX_CRTCS 1 + +enum mxsfb_devtype { + MXSFB_V3, + MXSFB_V4, +}; + +/* + * When adding new formats, make sure to update the num_formats from + * mxsfb_devdata below. + */ +static const uint32_t mxsfb_formats[] = { + /* MXSFB_V3 */ + DRM_FORMAT_XRGB8888, + DRM_FORMAT_ARGB8888, + DRM_FORMAT_RGB565, + /* MXSFB_V4 */ + DRM_FORMAT_XBGR8888, + DRM_FORMAT_ABGR8888, + DRM_FORMAT_RGBX8888, + DRM_FORMAT_RGBA8888, + DRM_FORMAT_ARGB1555, + DRM_FORMAT_XRGB1555, + DRM_FORMAT_ABGR1555, + DRM_FORMAT_XBGR1555, + DRM_FORMAT_BGR565 +}; + +static const struct mxsfb_devdata mxsfb_devdata[] = { + [MXSFB_V3] = { + .transfer_count = LCDC_V3_TRANSFER_COUNT, + .cur_buf = LCDC_V3_CUR_BUF, + .next_buf = LCDC_V3_NEXT_BUF, + .debug0 = LCDC_V3_DEBUG0, + .hs_wdth_mask = 0xff, + .hs_wdth_shift = 24, + .ipversion = 3, + .flags = MXSFB_FLAG_NULL, + .num_formats = 3, + }, + [MXSFB_V4] = { + .transfer_count = LCDC_V4_TRANSFER_COUNT, + .cur_buf = LCDC_V4_CUR_BUF, + .next_buf = LCDC_V4_NEXT_BUF, + .debug0 = LCDC_V4_DEBUG0, + .hs_wdth_mask = 0x3fff, + .hs_wdth_shift = 18, + .ipversion = 4, + .flags = MXSFB_FLAG_BUSFREQ, + .num_formats = ARRAY_SIZE(mxsfb_formats), + }, +}; + +static struct mxsfb_drm_private * +drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe) +{ + return container_of(pipe, struct mxsfb_drm_private, pipe); +} + +void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb) +{ + if (mxsfb->clk_axi) + clk_prepare_enable(mxsfb->clk_axi); +} + +void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb) +{ + if (mxsfb->clk_axi) + clk_disable_unprepare(mxsfb->clk_axi); +} + +/** + * mxsfb_atomic_helper_check - validate state object + * @dev: DRM device + * @state: the driver state object + * + * On top of the drm imlementation drm_atomic_helper_check, + * check if the bpp is changed, if so, signal mode_changed, + * this will trigger disable/enable + * + * RETURNS: + * Zero for success or -errno + */ +static int mxsfb_atomic_helper_check(struct drm_device *dev, + struct drm_atomic_state *state) +{ + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + int i, ret; + + ret = drm_atomic_helper_check(dev, state); + if (ret) + return ret; + + for_each_crtc_in_state(state, crtc, crtc_state, i) { + struct drm_plane_state *primary_state; + int old_bpp = 0; + int new_bpp = 0; + + if (!crtc->primary || !crtc->primary->old_fb) + continue; + primary_state = + drm_atomic_get_plane_state(state, crtc->primary); + if (!primary_state || !primary_state->fb) + continue; + old_bpp = crtc->primary->old_fb->bits_per_pixel; + new_bpp = primary_state->fb->bits_per_pixel; + if (old_bpp != new_bpp) { + crtc_state->mode_changed = true; + DRM_DEBUG_ATOMIC( + "[CRTC:%d:%s] mode changed, bpp %d->%d\n", + crtc->base.id, crtc->name, old_bpp, new_bpp); + } + } + return ret; +} + +static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = { + .fb_create = drm_fb_cma_create, + .atomic_check = mxsfb_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state) +{ + struct drm_device *drm = pipe->encoder.dev; + struct drm_connector *connector; + struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe); + + if (!mxsfb->connector) { + list_for_each_entry(connector, + &drm->mode_config.connector_list, + head) + if (connector->encoder == &(mxsfb->pipe.encoder)) { + mxsfb->connector = connector; + break; + } + } + + if (!mxsfb->connector) { + dev_warn(drm->dev, "No connector attached, using default\n"); + mxsfb->connector = &mxsfb->panel_connector; + } + + drm_crtc_vblank_on(&mxsfb->pipe.crtc); + + mxsfb_crtc_enable(mxsfb); + pm_runtime_get_sync(mxsfb->dev); +} + +static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe) +{ + struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe); + struct drm_crtc *crtc = &pipe->crtc; + + spin_lock_irq(&crtc->dev->event_lock); + if (crtc->state->event) { + drm_crtc_send_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + spin_unlock_irq(&crtc->dev->event_lock); + + mxsfb_crtc_disable(mxsfb); + pm_runtime_put_sync(mxsfb->dev); + + if (mxsfb->connector != &mxsfb->panel_connector) + mxsfb->connector = NULL; +} + +static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *plane_state) +{ + struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe); + + mxsfb_plane_atomic_update(mxsfb, plane_state); +} + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0) +static int mxsfb_pipe_prepare_fb(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *plane_state) +{ + return drm_fb_cma_prepare_fb(&pipe->plane, plane_state); +} +#endif + +struct drm_simple_display_pipe_funcs mxsfb_funcs = { + .enable = mxsfb_pipe_enable, + .disable = mxsfb_pipe_disable, + .update = mxsfb_pipe_update, +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0) + .prepare_fb = mxsfb_pipe_prepare_fb, +#endif +}; + +static int mxsfb_load(struct drm_device *drm, unsigned long flags) +{ + struct platform_device *pdev = to_platform_device(drm->dev); + struct mxsfb_drm_private *mxsfb; + struct resource *res; + u32 max_res[2] = {0, 0}; + int ret; + + mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL); + if (!mxsfb) + return -ENOMEM; + + drm->dev_private = mxsfb; + mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data]; + mxsfb->dev = &pdev->dev; + + platform_set_drvdata(pdev, drm); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mxsfb->base = devm_ioremap_resource(drm->dev, res); + if (IS_ERR(mxsfb->base)) + return PTR_ERR(mxsfb->base); + + mxsfb->clk = devm_clk_get(drm->dev, NULL); + if (IS_ERR(mxsfb->clk)) + return PTR_ERR(mxsfb->clk); + + mxsfb->clk_axi = devm_clk_get(drm->dev, "axi"); + if (IS_ERR(mxsfb->clk_axi)) + mxsfb->clk_axi = NULL; + + mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi"); + if (IS_ERR(mxsfb->clk_disp_axi)) + mxsfb->clk_disp_axi = NULL; + + ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)); + if (ret) + return ret; + + pm_runtime_enable(drm->dev); + + ret = drm_vblank_init(drm, MAX_CRTCS); + if (ret < 0) { + dev_err(drm->dev, "Failed to initialise vblank\n"); + goto err_vblank; + } + + /* Modeset init */ + drm_mode_config_init(drm); + + ret = mxsfb_create_output(drm); + if (ret < 0) { + dev_err(drm->dev, "Failed to create outputs\n"); + goto err_vblank; + } + + ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs, + mxsfb_formats, mxsfb->devdata->num_formats, NULL, + mxsfb->connector); + if (ret < 0) { + dev_err(drm->dev, "Cannot setup simple display pipe\n"); + goto err_vblank; + } + + drm_crtc_vblank_off(&mxsfb->pipe.crtc); + + /* + * Attach panel only if there is one. + * If there is no panel attach, it must be a bridge. In this case, we + * need a reference to its connector for a proper initialization. + * We will do this check in pipe->enable(), since the connector won't + * be attached to an encoder until then. + */ + + if (mxsfb->panel) { + ret = drm_panel_attach(mxsfb->panel, mxsfb->connector); + if (ret) { + dev_err(drm->dev, "Cannot connect panel\n"); + goto err_vblank; + } + } else if (mxsfb->bridge) { + ret = drm_simple_display_pipe_attach_bridge(&mxsfb->pipe, + mxsfb->bridge); + if (ret) { + dev_err(drm->dev, "Cannot connect bridge\n"); + goto err_vblank; + } + } + + of_property_read_u32_array(drm->dev->of_node, "max-res", + &max_res[0], 2); + if (!max_res[0]) + max_res[0] = MXSFB_MAX_XRES; + if (!max_res[1]) + max_res[1] = MXSFB_MAX_YRES; + + drm->mode_config.min_width = MXSFB_MIN_XRES; + drm->mode_config.min_height = MXSFB_MIN_YRES; + drm->mode_config.max_width = max_res[0]; + drm->mode_config.max_height = max_res[1]; + drm->mode_config.funcs = &mxsfb_mode_config_funcs; + + drm_mode_config_reset(drm); + + pm_runtime_get_sync(drm->dev); + ret = drm_irq_install(drm, platform_get_irq(pdev, 0)); + pm_runtime_put_sync(drm->dev); + + if (ret < 0) { + dev_err(drm->dev, "Failed to install IRQ handler\n"); + goto err_irq; + } + + drm_kms_helper_poll_init(drm); + + mxsfb->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc, + drm->mode_config.num_connector); + if (IS_ERR(mxsfb->fbdev)) { + mxsfb->fbdev = NULL; + dev_err(drm->dev, "Failed to init FB CMA area\n"); + goto err_cma; + } + + + drm_helper_hpd_irq_event(drm); + + return 0; + +err_cma: + drm_irq_uninstall(drm); +err_irq: + drm_panel_detach(mxsfb->panel); +err_vblank: + pm_runtime_disable(drm->dev); + + return ret; +} + +static void mxsfb_unload(struct drm_device *drm) +{ + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + if (mxsfb->fbdev) + drm_fbdev_cma_fini(mxsfb->fbdev); + + drm_kms_helper_poll_fini(drm); + drm_mode_config_cleanup(drm); + drm_vblank_cleanup(drm); + + pm_runtime_get_sync(drm->dev); + drm_irq_uninstall(drm); + pm_runtime_put_sync(drm->dev); + + drm->dev_private = NULL; + + pm_runtime_disable(drm->dev); +} + +static void mxsfb_lastclose(struct drm_device *drm) +{ + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + drm_fbdev_cma_restore_mode(mxsfb->fbdev); +} + +static int mxsfb_enable_vblank(struct drm_device *drm, unsigned int crtc) +{ + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + /* Clear and enable VBLANK IRQ */ + mxsfb_enable_axi_clk(mxsfb); + writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR); + writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET); + mxsfb_disable_axi_clk(mxsfb); + + return 0; +} + +static void mxsfb_disable_vblank(struct drm_device *drm, unsigned int crtc) +{ + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + /* Disable and clear VBLANK IRQ */ + mxsfb_enable_axi_clk(mxsfb); + writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR); + writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR); + mxsfb_disable_axi_clk(mxsfb); +} + +static void mxsfb_irq_preinstall(struct drm_device *drm) +{ + mxsfb_disable_vblank(drm, 0); +} + +static irqreturn_t mxsfb_irq_handler(int irq, void *data) +{ + struct drm_device *drm = data; + struct mxsfb_drm_private *mxsfb = drm->dev_private; + u32 reg; + + mxsfb_enable_axi_clk(mxsfb); + + reg = readl(mxsfb->base + LCDC_CTRL1); + + if (reg & CTRL1_CUR_FRAME_DONE_IRQ) + drm_crtc_handle_vblank(&mxsfb->pipe.crtc); + + writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR); + + mxsfb_disable_axi_clk(mxsfb); + + return IRQ_HANDLED; +} + +static const struct file_operations fops = { + .owner = THIS_MODULE, + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = drm_compat_ioctl, +#endif + .poll = drm_poll, + .read = drm_read, + .llseek = noop_llseek, + .mmap = drm_gem_cma_mmap, +}; + +static struct drm_driver mxsfb_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | + DRIVER_PRIME | DRIVER_ATOMIC | + DRIVER_HAVE_IRQ, + .lastclose = mxsfb_lastclose, + .irq_handler = mxsfb_irq_handler, + .irq_preinstall = mxsfb_irq_preinstall, + .irq_uninstall = mxsfb_irq_preinstall, + .get_vblank_counter = drm_vblank_no_hw_counter, + .enable_vblank = mxsfb_enable_vblank, + .disable_vblank = mxsfb_disable_vblank, + .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_export = drm_gem_prime_export, + .gem_prime_import = drm_gem_prime_import, + .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, + .fops = &fops, + .name = "mxsfb-drm", + .desc = "MXSFB Controller DRM", + .date = "20160824", + .major = 1, + .minor = 0, +}; + +static const struct platform_device_id mxsfb_devtype[] = { + { .name = "imx23-fb", .driver_data = MXSFB_V3, }, + { .name = "imx28-fb", .driver_data = MXSFB_V4, }, + { .name = "imx6sx-fb", .driver_data = MXSFB_V4, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, mxsfb_devtype); + +static const struct of_device_id mxsfb_dt_ids[] = { + { .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], }, + { .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], }, + { .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxsfb_dt_ids); + +static int mxsfb_probe(struct platform_device *pdev) +{ + struct drm_device *drm; + const struct of_device_id *of_id = + of_match_device(mxsfb_dt_ids, &pdev->dev); + int ret; + + if (!pdev->dev.of_node) + return -ENODEV; + + if (of_id) + pdev->id_entry = of_id->data; + + drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev); + if (!drm) + return -ENOMEM; + + ret = mxsfb_load(drm, 0); + if (ret) + goto err_free; + + ret = drm_dev_register(drm, 0); + if (ret) + goto err_unload; + + return 0; + +err_unload: + mxsfb_unload(drm); +err_free: + drm_dev_unref(drm); + + return ret; +} + +static int mxsfb_remove(struct platform_device *pdev) +{ + struct drm_device *drm = platform_get_drvdata(pdev); + + drm_dev_unregister(drm); + mxsfb_unload(drm); + drm_dev_unref(drm); + + return 0; +} + +#ifdef CONFIG_PM +static int mxsfb_runtime_suspend(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + if (!drm->registered) + return 0; + + if (mxsfb->enabled) { + mxsfb_crtc_disable(mxsfb); + mxsfb->suspended = true; + } + + return 0; +} + +static int mxsfb_runtime_resume(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + if (!drm->registered || !mxsfb->suspended) + return 0; + + mxsfb_crtc_enable(mxsfb); + mxsfb->suspended = false; + + return 0; +} + +static int mxsfb_suspend(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + if (mxsfb->enabled) { + mxsfb_crtc_disable(mxsfb); + mxsfb->suspended = true; + } + + return 0; +} + +static int mxsfb_resume(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct mxsfb_drm_private *mxsfb = drm->dev_private; + + if (!mxsfb->suspended) + return 0; + + mxsfb_crtc_enable(mxsfb); + mxsfb->suspended = false; + + return 0; +} +#endif + +static const struct dev_pm_ops mxsfb_pm_ops = { + SET_RUNTIME_PM_OPS(mxsfb_runtime_suspend, mxsfb_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume) +}; + +static struct platform_driver mxsfb_platform_driver = { + .probe = mxsfb_probe, + .remove = mxsfb_remove, + .id_table = mxsfb_devtype, + .driver = { + .name = "mxsfb_drm", + .of_match_table = mxsfb_dt_ids, + .pm = &mxsfb_pm_ops, + }, +}; + +module_platform_driver(mxsfb_platform_driver); + +MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); +MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver"); +MODULE_LICENSE("GPL"); |