1 files changed, 518 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
new file mode 100644
index 000000000000..11e84a251773
--- /dev/null
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -0,0 +1,518 @@
+/*
+ * 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/component.h>
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <linux/fb.h>
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+
+#include <video/imx-ipu-v3.h>
+#include "imx-drm.h"
+#include "ipuv3-plane.h"
+
+#define DRIVER_DESC             "i.MX IPUv3 Graphics"
+
+struct ipu_crtc {
+        struct device           *dev;
+        struct drm_crtc         base;
+        struct imx_drm_crtc     *imx_crtc;
+
+        /* plane[0] is the full plane, plane[1] is the partial plane */
+        struct ipu_plane        *plane[2];
+
+        struct ipu_dc           *dc;
+        struct ipu_di           *di;
+        int                     enabled;
+        struct drm_pending_vblank_event *page_flip_event;
+        struct drm_framebuffer  *newfb;
+        int                     irq;
+        u32                     interface_pix_fmt;
+        unsigned long           di_clkflags;
+        int                     di_hsync_pin;
+        int                     di_vsync_pin;
+};
+
+#define to_ipu_crtc(x) container_of(x, struct ipu_crtc, base)
+
+static void ipu_fb_enable(struct ipu_crtc *ipu_crtc)
+{
+        struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
+
+        if (ipu_crtc->enabled)
+                return;
+
+        ipu_dc_enable(ipu);
+        ipu_plane_enable(ipu_crtc->plane[0]);
+        /* Start DC channel and DI after IDMAC */
+        ipu_dc_enable_channel(ipu_crtc->dc);
+        ipu_di_enable(ipu_crtc->di);
+
+        ipu_crtc->enabled = 1;
+}
+
+static void ipu_fb_disable(struct ipu_crtc *ipu_crtc)
+{
+        struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
+
+        if (!ipu_crtc->enabled)
+                return;
+
+        /* Stop DC channel and DI before IDMAC */
+        ipu_dc_disable_channel(ipu_crtc->dc);
+        ipu_di_disable(ipu_crtc->di);
+        ipu_plane_disable(ipu_crtc->plane[0]);
+        ipu_dc_disable(ipu);
+
+        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_dbg(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,
+                uint32_t page_flip_flags)
+{
+        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;
+        crtc->primary->fb = fb;
+
+        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_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);
+        int ret;
+        struct ipu_di_signal_cfg sig_cfg = {};
+        u32 out_pixel_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);
+
+        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;
+
+        sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
+        sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
+
+        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;
+        }
+
+        return ipu_plane_mode_set(ipu_crtc->plane[0], crtc, mode,
+                                  crtc->primary->fb,
+                                  0, 0, mode->hdisplay, mode->vdisplay,
+                                  x, y, mode->hdisplay, mode->vdisplay);
+}
+
+static void ipu_crtc_handle_pageflip(struct ipu_crtc *ipu_crtc)
+{
+        unsigned long flags;
+        struct drm_device *drm = ipu_crtc->base.dev;
+
+        spin_lock_irqsave(&drm->event_lock, flags);
+        if (ipu_crtc->page_flip_event)
+                drm_send_vblank_event(drm, -1, ipu_crtc->page_flip_event);
+        ipu_crtc->page_flip_event = NULL;
+        imx_drm_crtc_vblank_put(ipu_crtc->imx_crtc);
+        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) {
+                struct ipu_plane *plane = ipu_crtc->plane[0];
+
+                ipu_crtc->newfb = NULL;
+                ipu_plane_set_base(plane, ipu_crtc->base.primary->fb,
+                                   plane->x, plane->y);
+                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 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,
+};
+
+static int ipu_enable_vblank(struct drm_crtc *crtc)
+{
+        return 0;
+}
+
+static void ipu_disable_vblank(struct drm_crtc *crtc)
+{
+        struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+        ipu_crtc->page_flip_event = NULL;
+        ipu_crtc->newfb = NULL;
+}
+
+static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
+                u32 pixfmt, int hsync_pin, int vsync_pin)
+{
+        struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+
+        ipu_crtc->interface_pix_fmt = pixfmt;
+        ipu_crtc->di_hsync_pin = hsync_pin;
+        ipu_crtc->di_vsync_pin = vsync_pin;
+
+        switch (encoder_type) {
+        case DRM_MODE_ENCODER_DAC:
+        case DRM_MODE_ENCODER_TVDAC:
+        case DRM_MODE_ENCODER_LVDS:
+                ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
+                        IPU_DI_CLKMODE_EXT;
+                break;
+        case DRM_MODE_ENCODER_TMDS:
+        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->dc))
+                ipu_dc_put(ipu_crtc->dc);
+        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->dc = ipu_dc_get(ipu, pdata->dc);
+        if (IS_ERR(ipu_crtc->dc)) {
+                ret = PTR_ERR(ipu_crtc->dc);
+                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;
+        }
+
+        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, struct drm_device *drm)
+{
+        struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
+        int dp = -EINVAL;
+        int ret;
+        int id;
+
+        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(drm, &ipu_crtc->base, &ipu_crtc->imx_crtc,
+                        &ipu_crtc_helper_funcs, ipu_crtc->dev->of_node);
+        if (ret) {
+                dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
+                goto err_put_resources;
+        }
+
+        if (pdata->dp >= 0)
+                dp = IPU_DP_FLOW_SYNC_BG;
+        id = imx_drm_crtc_id(ipu_crtc->imx_crtc);
+        ipu_crtc->plane[0] = ipu_plane_init(ipu_crtc->base.dev, ipu,
+                                            pdata->dma[0], dp, BIT(id), true);
+        ret = ipu_plane_get_resources(ipu_crtc->plane[0]);
+        if (ret) {
+                dev_err(ipu_crtc->dev, "getting plane 0 resources failed with %d.\n",
+                        ret);
+                goto err_remove_crtc;
+        }
+
+        /* If this crtc is using the DP, add an overlay plane */
+        if (pdata->dp >= 0 && pdata->dma[1] > 0) {
+                ipu_crtc->plane[1] = ipu_plane_init(ipu_crtc->base.dev, ipu,
+                                                    pdata->dma[1],
+                                                    IPU_DP_FLOW_SYNC_FG,
+                                                    BIT(id), false);
+                if (IS_ERR(ipu_crtc->plane[1]))
+                        ipu_crtc->plane[1] = NULL;
+        }
+
+        ipu_crtc->irq = ipu_plane_irq(ipu_crtc->plane[0]);
+        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_put_plane_res;
+        }
+
+        return 0;
+
+err_put_plane_res:
+        ipu_plane_put_resources(ipu_crtc->plane[0]);
+err_remove_crtc:
+        imx_drm_remove_crtc(ipu_crtc->imx_crtc);
+err_put_resources:
+        ipu_put_resources(ipu_crtc);
+
+        return ret;
+}
+
+static struct device_node *ipu_drm_get_port_by_id(struct device_node *parent,
+                                                  int port_id)
+{
+        struct device_node *port;
+        int id, ret;
+
+        port = of_get_child_by_name(parent, "port");
+        while (port) {
+                ret = of_property_read_u32(port, "reg", &id);
+                if (!ret && id == port_id)
+                        return port;
+
+                do {
+                        port = of_get_next_child(parent, port);
+                        if (!port)
+                                return NULL;
+                } while (of_node_cmp(port->name, "port"));
+        }
+
+        return NULL;
+}
+
+static int ipu_drm_bind(struct device *dev, struct device *master, void *data)
+{
+        struct ipu_client_platformdata *pdata = dev->platform_data;
+        struct drm_device *drm = data;
+        struct ipu_crtc *ipu_crtc;
+        int ret;
+
+        ipu_crtc = devm_kzalloc(dev, sizeof(*ipu_crtc), GFP_KERNEL);
+        if (!ipu_crtc)
+                return -ENOMEM;
+
+        ipu_crtc->dev = dev;
+
+        ret = ipu_crtc_init(ipu_crtc, pdata, drm);
+        if (ret)
+                return ret;
+
+        dev_set_drvdata(dev, ipu_crtc);
+
+        return 0;
+}
+
+static void ipu_drm_unbind(struct device *dev, struct device *master,
+        void *data)
+{
+        struct ipu_crtc *ipu_crtc = dev_get_drvdata(dev);
+
+        imx_drm_remove_crtc(ipu_crtc->imx_crtc);
+
+        ipu_plane_put_resources(ipu_crtc->plane[0]);
+        ipu_put_resources(ipu_crtc);
+}
+
+static const struct component_ops ipu_crtc_ops = {
+        .bind = ipu_drm_bind,
+        .unbind = ipu_drm_unbind,
+};
+
+static int ipu_drm_probe(struct platform_device *pdev)
+{
+        struct device *dev = &pdev->dev;
+        struct ipu_client_platformdata *pdata = dev->platform_data;
+        int ret;
+
+        if (!dev->platform_data)
+                return -EINVAL;
+
+        if (!dev->of_node) {
+                /* Associate crtc device with the corresponding DI port node */
+                dev->of_node = ipu_drm_get_port_by_id(dev->parent->of_node,
+                                                      pdata->di + 2);
+                if (!dev->of_node) {
+                        dev_err(dev, "missing port@%d node in %s\n",
+                                pdata->di + 2, dev->parent->of_node->full_name);
+                        return -ENODEV;
+                }
+        }
+
+        ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+        if (ret)
+                return ret;
+
+        return component_add(dev, &ipu_crtc_ops);
+}
+
+static int ipu_drm_remove(struct platform_device *pdev)
+{
+        component_del(&pdev->dev, &ipu_crtc_ops);
+        return 0;
+}
+
+static struct platform_driver ipu_drm_driver = {
+        .driver = {
+                .name = "imx-ipuv3-crtc",
+        },
+        .probe = ipu_drm_probe,
+        .remove = ipu_drm_remove,
+};
+module_platform_driver(ipu_drm_driver);
+
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-ipuv3-crtc");