316 lines
8.2 KiB
C
316 lines
8.2 KiB
C
/*
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* shmob_drm_drv.c -- SH Mobile DRM driver
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*
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* Copyright (C) 2012 Renesas Electronics Corporation
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*
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include "shmob_drm_drv.h"
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#include "shmob_drm_kms.h"
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#include "shmob_drm_plane.h"
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#include "shmob_drm_regs.h"
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/* -----------------------------------------------------------------------------
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* Hardware initialization
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*/
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static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
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{
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static const u32 ldmt1r[] = {
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[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
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[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
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[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
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[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
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[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
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[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
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[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
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[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
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[SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
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[SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
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[SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
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[SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
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[SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
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[SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
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[SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
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[SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
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[SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
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[SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
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[SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
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};
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if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
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dev_err(sdev->dev, "invalid interface type %u\n",
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sdev->pdata->iface.interface);
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return -EINVAL;
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}
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sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
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return 0;
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}
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static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
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enum shmob_drm_clk_source clksrc)
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{
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struct clk *clk;
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char *clkname;
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switch (clksrc) {
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case SHMOB_DRM_CLK_BUS:
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clkname = "bus_clk";
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sdev->lddckr = LDDCKR_ICKSEL_BUS;
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break;
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case SHMOB_DRM_CLK_PERIPHERAL:
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clkname = "peripheral_clk";
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sdev->lddckr = LDDCKR_ICKSEL_MIPI;
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break;
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case SHMOB_DRM_CLK_EXTERNAL:
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clkname = NULL;
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sdev->lddckr = LDDCKR_ICKSEL_HDMI;
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break;
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default:
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return -EINVAL;
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}
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clk = devm_clk_get(sdev->dev, clkname);
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if (IS_ERR(clk)) {
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dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
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return PTR_ERR(clk);
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}
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sdev->clock = clk;
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return 0;
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}
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/* -----------------------------------------------------------------------------
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* DRM operations
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*/
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static irqreturn_t shmob_drm_irq(int irq, void *arg)
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{
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struct drm_device *dev = arg;
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struct shmob_drm_device *sdev = dev->dev_private;
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unsigned long flags;
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u32 status;
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/* Acknowledge interrupts. Putting interrupt enable and interrupt flag
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* bits in the same register is really brain-dead design and requires
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* taking a spinlock.
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*/
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spin_lock_irqsave(&sdev->irq_lock, flags);
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status = lcdc_read(sdev, LDINTR);
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lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
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spin_unlock_irqrestore(&sdev->irq_lock, flags);
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if (status & LDINTR_VES) {
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drm_handle_vblank(dev, 0);
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shmob_drm_crtc_finish_page_flip(&sdev->crtc);
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}
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return IRQ_HANDLED;
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}
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DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops);
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static struct drm_driver shmob_drm_driver = {
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.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
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| DRIVER_PRIME,
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.irq_handler = shmob_drm_irq,
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.gem_free_object_unlocked = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
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.gem_prime_vmap = drm_gem_cma_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = drm_gem_cma_prime_mmap,
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.dumb_create = drm_gem_cma_dumb_create,
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.fops = &shmob_drm_fops,
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.name = "shmob-drm",
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.desc = "Renesas SH Mobile DRM",
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.date = "20120424",
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.major = 1,
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.minor = 0,
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};
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/* -----------------------------------------------------------------------------
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* Power management
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*/
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#ifdef CONFIG_PM_SLEEP
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static int shmob_drm_pm_suspend(struct device *dev)
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{
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struct shmob_drm_device *sdev = dev_get_drvdata(dev);
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drm_kms_helper_poll_disable(sdev->ddev);
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shmob_drm_crtc_suspend(&sdev->crtc);
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return 0;
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}
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static int shmob_drm_pm_resume(struct device *dev)
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{
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struct shmob_drm_device *sdev = dev_get_drvdata(dev);
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drm_modeset_lock_all(sdev->ddev);
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shmob_drm_crtc_resume(&sdev->crtc);
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drm_modeset_unlock_all(sdev->ddev);
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drm_kms_helper_poll_enable(sdev->ddev);
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return 0;
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}
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#endif
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static const struct dev_pm_ops shmob_drm_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
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};
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/* -----------------------------------------------------------------------------
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* Platform driver
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*/
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static int shmob_drm_remove(struct platform_device *pdev)
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{
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struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
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struct drm_device *ddev = sdev->ddev;
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drm_dev_unregister(ddev);
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drm_kms_helper_poll_fini(ddev);
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drm_mode_config_cleanup(ddev);
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drm_irq_uninstall(ddev);
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drm_dev_unref(ddev);
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return 0;
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}
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static int shmob_drm_probe(struct platform_device *pdev)
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{
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struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
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struct shmob_drm_device *sdev;
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struct drm_device *ddev;
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struct resource *res;
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unsigned int i;
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int ret;
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if (pdata == NULL) {
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dev_err(&pdev->dev, "no platform data\n");
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return -EINVAL;
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}
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/*
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* Allocate and initialize the driver private data, I/O resources and
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* clocks.
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*/
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sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
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if (sdev == NULL)
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return -ENOMEM;
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sdev->dev = &pdev->dev;
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sdev->pdata = pdata;
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spin_lock_init(&sdev->irq_lock);
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platform_set_drvdata(pdev, sdev);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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sdev->mmio = devm_ioremap_resource(&pdev->dev, res);
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if (sdev->mmio == NULL)
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return -ENOMEM;
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ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
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if (ret < 0)
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return ret;
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ret = shmob_drm_init_interface(sdev);
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if (ret < 0)
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return ret;
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/* Allocate and initialize the DRM device. */
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ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev);
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if (IS_ERR(ddev))
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return PTR_ERR(ddev);
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sdev->ddev = ddev;
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ddev->dev_private = sdev;
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ret = shmob_drm_modeset_init(sdev);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize mode setting\n");
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goto err_free_drm_dev;
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}
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for (i = 0; i < 4; ++i) {
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ret = shmob_drm_plane_create(sdev, i);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to create plane %u\n", i);
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goto err_modeset_cleanup;
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}
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}
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ret = drm_vblank_init(ddev, 1);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize vblank\n");
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goto err_modeset_cleanup;
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}
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ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to install IRQ handler\n");
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goto err_modeset_cleanup;
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}
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/*
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* Register the DRM device with the core and the connectors with
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* sysfs.
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*/
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ret = drm_dev_register(ddev, 0);
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if (ret < 0)
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goto err_irq_uninstall;
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return 0;
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err_irq_uninstall:
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drm_irq_uninstall(ddev);
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err_modeset_cleanup:
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drm_kms_helper_poll_fini(ddev);
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drm_mode_config_cleanup(ddev);
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err_free_drm_dev:
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drm_dev_unref(ddev);
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return ret;
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}
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static struct platform_driver shmob_drm_platform_driver = {
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.probe = shmob_drm_probe,
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.remove = shmob_drm_remove,
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.driver = {
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.name = "shmob-drm",
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.pm = &shmob_drm_pm_ops,
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},
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};
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module_platform_driver(shmob_drm_platform_driver);
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MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
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MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
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MODULE_LICENSE("GPL");
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