--- /dev/null
+/*
+ * i.MX IPUv3 Graphics 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <drm/drmP.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <linux/fb.h>
+#include <linux/clk.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+
+#include "ipu-v3/imx-ipu-v3.h"
+#include "imx-drm.h"
+
+#define DRIVER_DESC "i.MX IPUv3 Graphics"
+
+struct ipu_framebuffer {
+ struct drm_framebuffer base;
+ void *virt;
+ dma_addr_t phys;
+ size_t len;
+};
+
+struct ipu_crtc {
+ struct drm_fb_helper fb_helper;
+ struct ipu_framebuffer ifb;
+ int num_crtcs;
+ struct device *dev;
+ struct drm_crtc base;
+ struct imx_drm_crtc *imx_crtc;
+ struct ipuv3_channel *ipu_ch;
+ struct ipu_dc *dc;
+ struct ipu_dp *dp;
+ struct dmfc_channel *dmfc;
+ struct ipu_di *di;
+ int enabled;
+ struct ipu_priv *ipu_priv;
+ struct drm_pending_vblank_event *page_flip_event;
+ struct drm_framebuffer *newfb;
+ int irq;
+ u32 interface_pix_fmt;
+ unsigned long di_clkflags;
+};
+
+#define to_ipu_crtc(x) container_of(x, struct ipu_crtc, base)
+
+static int calc_vref(struct drm_display_mode *mode)
+{
+ unsigned long htotal, vtotal;
+
+ htotal = mode->htotal;
+ vtotal = mode->vtotal;
+
+ if (!htotal || !vtotal)
+ return 60;
+
+ return mode->clock * 1000 / vtotal / htotal;
+}
+
+static int calc_bandwidth(struct drm_display_mode *mode, unsigned int vref)
+{
+ return mode->hdisplay * mode->vdisplay * vref;
+}
+
+static void ipu_fb_enable(struct ipu_crtc *ipu_crtc)
+{
+ if (ipu_crtc->enabled)
+ return;
+
+ ipu_di_enable(ipu_crtc->di);
+ ipu_dmfc_enable_channel(ipu_crtc->dmfc);
+ ipu_idmac_enable_channel(ipu_crtc->ipu_ch);
+ ipu_dc_enable_channel(ipu_crtc->dc);
+ if (ipu_crtc->dp)
+ ipu_dp_enable_channel(ipu_crtc->dp);
+
+ ipu_crtc->enabled = 1;
+}
+
+static void ipu_fb_disable(struct ipu_crtc *ipu_crtc)
+{
+ if (!ipu_crtc->enabled)
+ return;
+
+ if (ipu_crtc->dp)
+ ipu_dp_disable_channel(ipu_crtc->dp);
+ ipu_dc_disable_channel(ipu_crtc->dc);
+ ipu_idmac_disable_channel(ipu_crtc->ipu_ch);
+ ipu_dmfc_disable_channel(ipu_crtc->dmfc);
+ ipu_di_disable(ipu_crtc->di);
+
+ ipu_crtc->enabled = 0;
+}
+
+static void ipu_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+ dev_info(ipu_crtc->dev, "%s mode: %d\n", __func__, mode);
+
+ switch (mode) {
+ case DRM_MODE_DPMS_ON:
+ ipu_fb_enable(ipu_crtc);
+ break;
+ case DRM_MODE_DPMS_STANDBY:
+ case DRM_MODE_DPMS_SUSPEND:
+ case DRM_MODE_DPMS_OFF:
+ ipu_fb_disable(ipu_crtc);
+ break;
+ }
+}
+
+static int ipu_page_flip(struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+ int ret;
+
+ if (ipu_crtc->newfb)
+ return -EBUSY;
+
+ ret = imx_drm_crtc_vblank_get(ipu_crtc->imx_crtc);
+ if (ret) {
+ dev_dbg(ipu_crtc->dev, "failed to acquire vblank counter\n");
+ list_del(&event->base.link);
+
+ return ret;
+ }
+
+ ipu_crtc->newfb = fb;
+ ipu_crtc->page_flip_event = event;
+
+ return 0;
+}
+
+static const struct drm_crtc_funcs ipu_crtc_funcs = {
+ .set_config = drm_crtc_helper_set_config,
+ .destroy = drm_crtc_cleanup,
+ .page_flip = ipu_page_flip,
+};
+
+static int ipu_drm_set_base(struct drm_crtc *crtc, int x, int y)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+ struct drm_gem_cma_object *cma_obj;
+ struct drm_framebuffer *fb = crtc->fb;
+ unsigned long phys;
+
+ cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+ if (!cma_obj) {
+ DRM_LOG_KMS("entry is null.\n");
+ return -EFAULT;
+ }
+
+ phys = cma_obj->paddr;
+ phys += x * (fb->bits_per_pixel >> 3);
+ phys += y * fb->pitches[0];
+
+ dev_dbg(ipu_crtc->dev, "%s: phys: 0x%lx\n", __func__, phys);
+ dev_dbg(ipu_crtc->dev, "%s: xy: %dx%d\n", __func__, x, y);
+
+ ipu_cpmem_set_stride(ipu_get_cpmem(ipu_crtc->ipu_ch), fb->pitches[0]);
+ ipu_cpmem_set_buffer(ipu_get_cpmem(ipu_crtc->ipu_ch),
+ 0, phys);
+
+ return 0;
+}
+
+static int ipu_crtc_mode_set(struct drm_crtc *crtc,
+ struct drm_display_mode *orig_mode,
+ struct drm_display_mode *mode,
+ int x, int y,
+ struct drm_framebuffer *old_fb)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+ struct drm_framebuffer *fb = ipu_crtc->base.fb;
+ int ret;
+ struct ipu_di_signal_cfg sig_cfg = {};
+ u32 out_pixel_fmt;
+ struct ipu_ch_param __iomem *cpmem = ipu_get_cpmem(ipu_crtc->ipu_ch);
+ int bpp;
+ u32 v4l2_fmt;
+
+ dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,
+ mode->hdisplay);
+ dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,
+ mode->vdisplay);
+
+ ipu_ch_param_zero(cpmem);
+
+ switch (fb->pixel_format) {
+ case DRM_FORMAT_XRGB8888:
+ case DRM_FORMAT_ARGB8888:
+ v4l2_fmt = V4L2_PIX_FMT_RGB32;
+ bpp = 32;
+ break;
+ case DRM_FORMAT_RGB565:
+ v4l2_fmt = V4L2_PIX_FMT_RGB565;
+ bpp = 16;
+ break;
+ case DRM_FORMAT_RGB888:
+ v4l2_fmt = V4L2_PIX_FMT_RGB24;
+ bpp = 24;
+ break;
+ default:
+ dev_err(ipu_crtc->dev, "unsupported pixel format 0x%08x\n",
+ fb->pixel_format);
+ return -EINVAL;
+ }
+
+ out_pixel_fmt = ipu_crtc->interface_pix_fmt;
+
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ sig_cfg.interlaced = 1;
+ if (mode->flags & DRM_MODE_FLAG_PHSYNC)
+ sig_cfg.Hsync_pol = 1;
+ if (mode->flags & DRM_MODE_FLAG_PVSYNC)
+ sig_cfg.Vsync_pol = 1;
+
+ sig_cfg.enable_pol = 1;
+ sig_cfg.clk_pol = 0;
+ sig_cfg.width = mode->hdisplay;
+ sig_cfg.height = mode->vdisplay;
+ sig_cfg.pixel_fmt = out_pixel_fmt;
+ sig_cfg.h_start_width = mode->htotal - mode->hsync_end;
+ sig_cfg.h_sync_width = mode->hsync_end - mode->hsync_start;
+ sig_cfg.h_end_width = mode->hsync_start - mode->hdisplay;
+
+ sig_cfg.v_start_width = mode->vtotal - mode->vsync_end;
+ sig_cfg.v_sync_width = mode->vsync_end - mode->vsync_start;
+ sig_cfg.v_end_width = mode->vsync_start - mode->vdisplay;
+ sig_cfg.pixelclock = mode->clock * 1000;
+ sig_cfg.clkflags = ipu_crtc->di_clkflags;
+
+ sig_cfg.v_to_h_sync = 0;
+
+ if (ipu_crtc->dp) {
+ ret = ipu_dp_setup_channel(ipu_crtc->dp, IPUV3_COLORSPACE_RGB,
+ IPUV3_COLORSPACE_RGB);
+ if (ret) {
+ dev_err(ipu_crtc->dev,
+ "initializing display processor failed with %d\n",
+ ret);
+ return ret;
+ }
+ ipu_dp_set_global_alpha(ipu_crtc->dp, 1, 0, 1);
+ }
+
+ ret = ipu_dc_init_sync(ipu_crtc->dc, ipu_crtc->di, sig_cfg.interlaced,
+ out_pixel_fmt, mode->hdisplay);
+ if (ret) {
+ dev_err(ipu_crtc->dev,
+ "initializing display controller failed with %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = ipu_di_init_sync_panel(ipu_crtc->di, &sig_cfg);
+ if (ret) {
+ dev_err(ipu_crtc->dev,
+ "initializing panel failed with %d\n", ret);
+ return ret;
+ }
+
+ ipu_cpmem_set_resolution(cpmem, mode->hdisplay, mode->vdisplay);
+ ipu_cpmem_set_fmt(cpmem, v4l2_fmt);
+ ipu_cpmem_set_high_priority(ipu_crtc->ipu_ch);
+
+ ret = ipu_dmfc_init_channel(ipu_crtc->dmfc, mode->hdisplay);
+ if (ret) {
+ dev_err(ipu_crtc->dev,
+ "initializing dmfc channel failed with %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = ipu_dmfc_alloc_bandwidth(ipu_crtc->dmfc,
+ calc_bandwidth(mode, calc_vref(mode)), 64);
+ if (ret) {
+ dev_err(ipu_crtc->dev,
+ "allocating dmfc bandwidth failed with %d\n",
+ ret);
+ return ret;
+ }
+
+ ipu_drm_set_base(crtc, x, y);
+
+ return 0;
+}
+
+static void ipu_crtc_handle_pageflip(struct ipu_crtc *ipu_crtc)
+{
+ struct drm_pending_vblank_event *e;
+ struct timeval now;
+ unsigned long flags;
+ struct drm_device *drm = ipu_crtc->base.dev;
+
+ spin_lock_irqsave(&drm->event_lock, flags);
+
+ e = ipu_crtc->page_flip_event;
+ if (!e) {
+ spin_unlock_irqrestore(&drm->event_lock, flags);
+ return;
+ }
+
+ do_gettimeofday(&now);
+ e->event.sequence = 0;
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+ ipu_crtc->page_flip_event = NULL;
+
+ imx_drm_crtc_vblank_put(ipu_crtc->imx_crtc);
+
+ list_add_tail(&e->base.link, &e->base.file_priv->event_list);
+
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+
+ spin_unlock_irqrestore(&drm->event_lock, flags);
+}
+
+static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
+{
+ struct ipu_crtc *ipu_crtc = dev_id;
+
+ imx_drm_handle_vblank(ipu_crtc->imx_crtc);
+
+ if (ipu_crtc->newfb) {
+ ipu_crtc->base.fb = ipu_crtc->newfb;
+ ipu_crtc->newfb = NULL;
+ ipu_drm_set_base(&ipu_crtc->base, 0, 0);
+ ipu_crtc_handle_pageflip(ipu_crtc);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static bool ipu_crtc_mode_fixup(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ return true;
+}
+
+static void ipu_crtc_prepare(struct drm_crtc *crtc)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+ ipu_fb_disable(ipu_crtc);
+}
+
+static void ipu_crtc_commit(struct drm_crtc *crtc)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+ ipu_fb_enable(ipu_crtc);
+}
+
+static void ipu_crtc_load_lut(struct drm_crtc *crtc)
+{
+}
+
+static struct drm_crtc_helper_funcs ipu_helper_funcs = {
+ .dpms = ipu_crtc_dpms,
+ .mode_fixup = ipu_crtc_mode_fixup,
+ .mode_set = ipu_crtc_mode_set,
+ .prepare = ipu_crtc_prepare,
+ .commit = ipu_crtc_commit,
+ .load_lut = ipu_crtc_load_lut,
+};
+
+static int ipu_enable_vblank(struct drm_crtc *crtc)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+ enable_irq(ipu_crtc->irq);
+
+ return 0;
+}
+
+static void ipu_disable_vblank(struct drm_crtc *crtc)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+ disable_irq(ipu_crtc->irq);
+}
+
+static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
+ u32 pixfmt)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+ ipu_crtc->interface_pix_fmt = pixfmt;
+
+ switch (encoder_type) {
+ case DRM_MODE_ENCODER_LVDS:
+ ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
+ IPU_DI_CLKMODE_EXT;
+ break;
+ case DRM_MODE_ENCODER_NONE:
+ ipu_crtc->di_clkflags = 0;
+ break;
+ }
+
+ return 0;
+}
+
+static const struct imx_drm_crtc_helper_funcs ipu_crtc_helper_funcs = {
+ .enable_vblank = ipu_enable_vblank,
+ .disable_vblank = ipu_disable_vblank,
+ .set_interface_pix_fmt = ipu_set_interface_pix_fmt,
+ .crtc_funcs = &ipu_crtc_funcs,
+ .crtc_helper_funcs = &ipu_helper_funcs,
+};
+
+static void ipu_put_resources(struct ipu_crtc *ipu_crtc)
+{
+ if (!IS_ERR_OR_NULL(ipu_crtc->ipu_ch))
+ ipu_idmac_put(ipu_crtc->ipu_ch);
+ if (!IS_ERR_OR_NULL(ipu_crtc->dmfc))
+ ipu_dmfc_put(ipu_crtc->dmfc);
+ if (!IS_ERR_OR_NULL(ipu_crtc->dp))
+ ipu_dp_put(ipu_crtc->dp);
+ if (!IS_ERR_OR_NULL(ipu_crtc->di))
+ ipu_di_put(ipu_crtc->di);
+}
+
+static int ipu_get_resources(struct ipu_crtc *ipu_crtc,
+ struct ipu_client_platformdata *pdata)
+{
+ struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
+ int ret;
+
+ ipu_crtc->ipu_ch = ipu_idmac_get(ipu, pdata->dma[0]);
+ if (IS_ERR_OR_NULL(ipu_crtc->ipu_ch)) {
+ ret = PTR_ERR(ipu_crtc->ipu_ch);
+ goto err_out;
+ }
+
+ ipu_crtc->dc = ipu_dc_get(ipu, pdata->dc);
+ if (IS_ERR(ipu_crtc->dc)) {
+ ret = PTR_ERR(ipu_crtc->dc);
+ goto err_out;
+ }
+
+ ipu_crtc->dmfc = ipu_dmfc_get(ipu, pdata->dma[0]);
+ if (IS_ERR(ipu_crtc->dmfc)) {
+ ret = PTR_ERR(ipu_crtc->dmfc);
+ goto err_out;
+ }
+
+ if (pdata->dp >= 0) {
+ ipu_crtc->dp = ipu_dp_get(ipu, pdata->dp);
+ if (IS_ERR(ipu_crtc->dp)) {
+ ret = PTR_ERR(ipu_crtc->ipu_ch);
+ goto err_out;
+ }
+ }
+
+ ipu_crtc->di = ipu_di_get(ipu, pdata->di);
+ if (IS_ERR(ipu_crtc->di)) {
+ ret = PTR_ERR(ipu_crtc->di);
+ goto err_out;
+ }
+
+ ipu_crtc->irq = ipu_idmac_channel_irq(ipu, ipu_crtc->ipu_ch,
+ IPU_IRQ_EOF);
+ ret = devm_request_irq(ipu_crtc->dev, ipu_crtc->irq, ipu_irq_handler, 0,
+ "imx_drm", ipu_crtc);
+ if (ret < 0) {
+ dev_err(ipu_crtc->dev, "irq request failed with %d.\n", ret);
+ goto err_out;
+ }
+
+ disable_irq(ipu_crtc->irq);
+
+ return 0;
+err_out:
+ ipu_put_resources(ipu_crtc);
+
+ return ret;
+}
+
+static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
+ struct ipu_client_platformdata *pdata)
+{
+ int ret;
+
+ ret = ipu_get_resources(ipu_crtc, pdata);
+ if (ret) {
+ dev_err(ipu_crtc->dev, "getting resources failed with %d.\n",
+ ret);
+ return ret;
+ }
+
+ ret = imx_drm_add_crtc(&ipu_crtc->base,
+ &ipu_crtc->imx_crtc,
+ &ipu_crtc_helper_funcs, THIS_MODULE,
+ ipu_crtc->dev->parent->of_node, pdata->di);
+ if (ret) {
+ dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
+ goto err_put_resources;
+ }
+
+ return 0;
+
+err_put_resources:
+ ipu_put_resources(ipu_crtc);
+
+ return ret;
+}
+
+static int __devinit ipu_drm_probe(struct platform_device *pdev)
+{
+ struct ipu_client_platformdata *pdata = pdev->dev.platform_data;
+ struct ipu_crtc *ipu_crtc;
+ int ret;
+
+ if (!pdata)
+ return -EINVAL;
+
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
+ ipu_crtc = devm_kzalloc(&pdev->dev, sizeof(*ipu_crtc), GFP_KERNEL);
+ if (!ipu_crtc)
+ return -ENOMEM;
+
+ ipu_crtc->dev = &pdev->dev;
+
+ ret = ipu_crtc_init(ipu_crtc, pdata);
+
+ platform_set_drvdata(pdev, ipu_crtc);
+
+ return 0;
+}
+
+static int __devexit ipu_drm_remove(struct platform_device *pdev)
+{
+ struct ipu_crtc *ipu_crtc = platform_get_drvdata(pdev);
+
+ imx_drm_remove_crtc(ipu_crtc->imx_crtc);
+
+ ipu_put_resources(ipu_crtc);
+
+ return 0;
+}
+
+static struct platform_driver ipu_drm_driver = {
+ .driver = {
+ .name = "imx-ipuv3-crtc",
+ },
+ .probe = ipu_drm_probe,
+ .remove = __devexit_p(ipu_drm_remove),
+};
+module_platform_driver(ipu_drm_driver);
+
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
projects / firefly-linux-kernel-4.4.55.git / commitdiff