X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fshmobile%2Fshmob_drm_drv.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fshmobile%2Fshmob_drm_drv.c;h=666321de7b9928d9dc88af09cfd95efd0a5dbadb;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/kernel/drivers/gpu/drm/shmobile/shmob_drm_drv.c new file mode 100644 index 000000000..666321de7 --- /dev/null +++ b/kernel/drivers/gpu/drm/shmobile/shmob_drm_drv.c @@ -0,0 +1,360 @@ +/* + * shmob_drm_drv.c -- SH Mobile DRM driver + * + * Copyright (C) 2012 Renesas Electronics Corporation + * + * Laurent Pinchart (laurent.pinchart@ideasonboard.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 +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "shmob_drm_crtc.h" +#include "shmob_drm_drv.h" +#include "shmob_drm_kms.h" +#include "shmob_drm_plane.h" +#include "shmob_drm_regs.h" + +/* ----------------------------------------------------------------------------- + * Hardware initialization + */ + +static int shmob_drm_init_interface(struct shmob_drm_device *sdev) +{ + static const u32 ldmt1r[] = { + [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8, + [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9, + [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A, + [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B, + [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16, + [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18, + [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24, + [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR, + [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A, + [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B, + [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C, + [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D, + [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9, + [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12, + [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A, + [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B, + [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C, + [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18, + [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24, + }; + + if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) { + dev_err(sdev->dev, "invalid interface type %u\n", + sdev->pdata->iface.interface); + return -EINVAL; + } + + sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface]; + return 0; +} + +static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev, + enum shmob_drm_clk_source clksrc) +{ + struct clk *clk; + char *clkname; + + switch (clksrc) { + case SHMOB_DRM_CLK_BUS: + clkname = "bus_clk"; + sdev->lddckr = LDDCKR_ICKSEL_BUS; + break; + case SHMOB_DRM_CLK_PERIPHERAL: + clkname = "peripheral_clk"; + sdev->lddckr = LDDCKR_ICKSEL_MIPI; + break; + case SHMOB_DRM_CLK_EXTERNAL: + clkname = NULL; + sdev->lddckr = LDDCKR_ICKSEL_HDMI; + break; + default: + return -EINVAL; + } + + clk = devm_clk_get(sdev->dev, clkname); + if (IS_ERR(clk)) { + dev_err(sdev->dev, "cannot get dot clock %s\n", clkname); + return PTR_ERR(clk); + } + + sdev->clock = clk; + return 0; +} + +/* ----------------------------------------------------------------------------- + * DRM operations + */ + +static int shmob_drm_unload(struct drm_device *dev) +{ + drm_kms_helper_poll_fini(dev); + drm_mode_config_cleanup(dev); + drm_vblank_cleanup(dev); + drm_irq_uninstall(dev); + + dev->dev_private = NULL; + + return 0; +} + +static int shmob_drm_load(struct drm_device *dev, unsigned long flags) +{ + struct shmob_drm_platform_data *pdata = dev->dev->platform_data; + struct platform_device *pdev = dev->platformdev; + struct shmob_drm_device *sdev; + struct resource *res; + unsigned int i; + int ret; + + if (pdata == NULL) { + dev_err(dev->dev, "no platform data\n"); + return -EINVAL; + } + + sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL); + if (sdev == NULL) { + dev_err(dev->dev, "failed to allocate private data\n"); + return -ENOMEM; + } + + sdev->dev = &pdev->dev; + sdev->pdata = pdata; + spin_lock_init(&sdev->irq_lock); + + sdev->ddev = dev; + dev->dev_private = sdev; + + /* I/O resources and clocks */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(&pdev->dev, "failed to get memory resource\n"); + return -EINVAL; + } + + sdev->mmio = devm_ioremap_nocache(&pdev->dev, res->start, + resource_size(res)); + if (sdev->mmio == NULL) { + dev_err(&pdev->dev, "failed to remap memory resource\n"); + return -ENOMEM; + } + + ret = shmob_drm_setup_clocks(sdev, pdata->clk_source); + if (ret < 0) + return ret; + + ret = shmob_drm_init_interface(sdev); + if (ret < 0) + return ret; + + ret = shmob_drm_modeset_init(sdev); + if (ret < 0) { + dev_err(&pdev->dev, "failed to initialize mode setting\n"); + return ret; + } + + for (i = 0; i < 4; ++i) { + ret = shmob_drm_plane_create(sdev, i); + if (ret < 0) { + dev_err(&pdev->dev, "failed to create plane %u\n", i); + goto done; + } + } + + ret = drm_vblank_init(dev, 1); + if (ret < 0) { + dev_err(&pdev->dev, "failed to initialize vblank\n"); + goto done; + } + + ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0)); + if (ret < 0) { + dev_err(&pdev->dev, "failed to install IRQ handler\n"); + goto done; + } + + platform_set_drvdata(pdev, sdev); + +done: + if (ret) + shmob_drm_unload(dev); + + return ret; +} + +static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file) +{ + struct shmob_drm_device *sdev = dev->dev_private; + + shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file); +} + +static irqreturn_t shmob_drm_irq(int irq, void *arg) +{ + struct drm_device *dev = arg; + struct shmob_drm_device *sdev = dev->dev_private; + unsigned long flags; + u32 status; + + /* Acknowledge interrupts. Putting interrupt enable and interrupt flag + * bits in the same register is really brain-dead design and requires + * taking a spinlock. + */ + spin_lock_irqsave(&sdev->irq_lock, flags); + status = lcdc_read(sdev, LDINTR); + lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK); + spin_unlock_irqrestore(&sdev->irq_lock, flags); + + if (status & LDINTR_VES) { + drm_handle_vblank(dev, 0); + shmob_drm_crtc_finish_page_flip(&sdev->crtc); + } + + return IRQ_HANDLED; +} + +static int shmob_drm_enable_vblank(struct drm_device *dev, int crtc) +{ + struct shmob_drm_device *sdev = dev->dev_private; + + shmob_drm_crtc_enable_vblank(sdev, true); + + return 0; +} + +static void shmob_drm_disable_vblank(struct drm_device *dev, int crtc) +{ + struct shmob_drm_device *sdev = dev->dev_private; + + shmob_drm_crtc_enable_vblank(sdev, false); +} + +static const struct file_operations shmob_drm_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 = no_llseek, + .mmap = drm_gem_cma_mmap, +}; + +static struct drm_driver shmob_drm_driver = { + .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET + | DRIVER_PRIME, + .load = shmob_drm_load, + .unload = shmob_drm_unload, + .preclose = shmob_drm_preclose, + .set_busid = drm_platform_set_busid, + .irq_handler = shmob_drm_irq, + .get_vblank_counter = drm_vblank_count, + .enable_vblank = shmob_drm_enable_vblank, + .disable_vblank = shmob_drm_disable_vblank, + .gem_free_object = drm_gem_cma_free_object, + .gem_vm_ops = &drm_gem_cma_vm_ops, + .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, + .dumb_create = drm_gem_cma_dumb_create, + .dumb_map_offset = drm_gem_cma_dumb_map_offset, + .dumb_destroy = drm_gem_dumb_destroy, + .fops = &shmob_drm_fops, + .name = "shmob-drm", + .desc = "Renesas SH Mobile DRM", + .date = "20120424", + .major = 1, + .minor = 0, +}; + +/* ----------------------------------------------------------------------------- + * Power management + */ + +#ifdef CONFIG_PM_SLEEP +static int shmob_drm_pm_suspend(struct device *dev) +{ + struct shmob_drm_device *sdev = dev_get_drvdata(dev); + + drm_kms_helper_poll_disable(sdev->ddev); + shmob_drm_crtc_suspend(&sdev->crtc); + + return 0; +} + +static int shmob_drm_pm_resume(struct device *dev) +{ + struct shmob_drm_device *sdev = dev_get_drvdata(dev); + + drm_modeset_lock_all(sdev->ddev); + shmob_drm_crtc_resume(&sdev->crtc); + drm_modeset_unlock_all(sdev->ddev); + + drm_kms_helper_poll_enable(sdev->ddev); + return 0; +} +#endif + +static const struct dev_pm_ops shmob_drm_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume) +}; + +/* ----------------------------------------------------------------------------- + * Platform driver + */ + +static int shmob_drm_probe(struct platform_device *pdev) +{ + return drm_platform_init(&shmob_drm_driver, pdev); +} + +static int shmob_drm_remove(struct platform_device *pdev) +{ + struct shmob_drm_device *sdev = platform_get_drvdata(pdev); + + drm_put_dev(sdev->ddev); + + return 0; +} + +static struct platform_driver shmob_drm_platform_driver = { + .probe = shmob_drm_probe, + .remove = shmob_drm_remove, + .driver = { + .name = "shmob-drm", + .pm = &shmob_drm_pm_ops, + }, +}; + +module_platform_driver(shmob_drm_platform_driver); + +MODULE_AUTHOR("Laurent Pinchart "); +MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver"); +MODULE_LICENSE("GPL");