Merge tag 'drm-hisilicon-next-2016-11-17' of http://github.com/zourongrong/linux into drm-next

hibmc drm driver for hisilicon.

* tag 'drm-hisilicon-next-2016-11-17' of http://github.com/zourongrong/linux:
  MAINTAINERS: Update HISILICON DRM entries
  drm/hisilicon/hibmc: Add support for vblank interrupt
  drm/hisilicon/hibmc: Add support for VDAC
  drm/hisilicon/hibmc: Add support for display engine
  drm/hisilicon/hibmc: Add support for frame buffer
  drm/hisilicon/hibmc: Add video memory management
  drm/hisilicon/hibmc: Add hisilicon hibmc drm master driver

MAINTAINERS

@@ -4134,6 +4134,7 @@ F:	drivers/gpu/drm/gma500/
 
 DRM DRIVERS FOR HISILICON
 M:	Xinliang Liu <z.liuxinliang@hisilicon.com>
+M:	Rongrong Zou <zourongrong@gmail.com>
 R:	Xinwei Kong <kong.kongxinwei@hisilicon.com>
 R:	Chen Feng <puck.chen@hisilicon.com>
 L:	dri-devel@lists.freedesktop.org

drivers/gpu/drm/hisilicon/Kconfig

@@ -2,4 +2,5 @@
 # hisilicon drm device configuration.
 # Please keep this list sorted alphabetically
 
+source "drivers/gpu/drm/hisilicon/hibmc/Kconfig"
 source "drivers/gpu/drm/hisilicon/kirin/Kconfig"

drivers/gpu/drm/hisilicon/Makefile

@@ -2,4 +2,5 @@
 # Makefile for hisilicon drm drivers.
 # Please keep this list sorted alphabetically
 
+obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc/
 obj-$(CONFIG_DRM_HISI_KIRIN) += kirin/

drivers/gpu/drm/hisilicon/hibmc/Kconfig

+config DRM_HISI_HIBMC
+	tristate "DRM Support for Hisilicon Hibmc"
+	depends on DRM && PCI
+	select DRM_KMS_HELPER
+	select DRM_TTM
+
+	help
+	  Choose this option if you have a Hisilicon Hibmc soc chipset.
+	  If M is selected the module will be called hibmc-drm.

drivers/gpu/drm/hisilicon/hibmc/Makefile

+ccflags-y := -Iinclude/drm
+hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_fbdev.o hibmc_ttm.o
+
+obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.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.
+ *
+ */
+
+#ifndef HIBMC_DRM_DRV_H
+#define HIBMC_DRM_DRV_H
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem.h>
+#include <drm/ttm/ttm_bo_driver.h>
+
+struct hibmc_framebuffer {
+	struct drm_framebuffer fb;
+	struct drm_gem_object *obj;
+};
+
+struct hibmc_fbdev {
+	struct drm_fb_helper helper;
+	struct hibmc_framebuffer *fb;
+	int size;
+};
+
+struct hibmc_drm_private {
+	/* hw */
+	void __iomem   *mmio;
+	void __iomem   *fb_map;
+	unsigned long  fb_base;
+	unsigned long  fb_size;
+	bool msi_enabled;
+
+	/* drm */
+	struct drm_device  *dev;
+	bool mode_config_initialized;
+	struct drm_atomic_state *suspend_state;
+
+	/* ttm */
+	struct drm_global_reference mem_global_ref;
+	struct ttm_bo_global_ref bo_global_ref;
+	struct ttm_bo_device bdev;
+	bool initialized;
+
+	/* fbdev */
+	struct hibmc_fbdev *fbdev;
+	bool mm_inited;
+};
+
+#define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
+
+struct hibmc_bo {
+	struct ttm_buffer_object bo;
+	struct ttm_placement placement;
+	struct ttm_bo_kmap_obj kmap;
+	struct drm_gem_object gem;
+	struct ttm_place placements[3];
+	int pin_count;
+};
+
+static inline struct hibmc_bo *hibmc_bo(struct ttm_buffer_object *bo)
+{
+	return container_of(bo, struct hibmc_bo, bo);
+}
+
+static inline struct hibmc_bo *gem_to_hibmc_bo(struct drm_gem_object *gem)
+{
+	return container_of(gem, struct hibmc_bo, gem);
+}
+
+void hibmc_set_power_mode(struct hibmc_drm_private *priv,
+			  unsigned int power_mode);
+void hibmc_set_current_gate(struct hibmc_drm_private *priv,
+			    unsigned int gate);
+
+int hibmc_de_init(struct hibmc_drm_private *priv);
+int hibmc_vdac_init(struct hibmc_drm_private *priv);
+int hibmc_fbdev_init(struct hibmc_drm_private *priv);
+void hibmc_fbdev_fini(struct hibmc_drm_private *priv);
+
+int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
+		     struct drm_gem_object **obj);
+struct hibmc_framebuffer *
+hibmc_framebuffer_init(struct drm_device *dev,
+		       const struct drm_mode_fb_cmd2 *mode_cmd,
+		       struct drm_gem_object *obj);
+
+int hibmc_mm_init(struct hibmc_drm_private *hibmc);
+void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
+int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
+int hibmc_bo_unpin(struct hibmc_bo *bo);
+void hibmc_gem_free_object(struct drm_gem_object *obj);
+int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
+		      struct drm_mode_create_dumb *args);
+int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
+			   u32 handle, u64 *offset);
+int hibmc_mmap(struct file *filp, struct vm_area_struct *vma);
+
+extern const struct drm_mode_config_funcs hibmc_mode_funcs;
+
+#endif

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.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 <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+
+#include "hibmc_drm_drv.h"
+
+static int hibmcfb_create_object(
+				struct hibmc_drm_private *priv,
+				const struct drm_mode_fb_cmd2 *mode_cmd,
+				struct drm_gem_object **gobj_p)
+{
+	struct drm_gem_object *gobj;
+	struct drm_device *dev = priv->dev;
+	u32 size;
+	int ret = 0;
+
+	size = mode_cmd->pitches[0] * mode_cmd->height;
+	ret = hibmc_gem_create(dev, size, true, &gobj);
+	if (ret)
+		return ret;
+
+	*gobj_p = gobj;
+	return ret;
+}
+
+static struct fb_ops hibmc_drm_fb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_fillrect = drm_fb_helper_sys_fillrect,
+	.fb_copyarea = drm_fb_helper_sys_copyarea,
+	.fb_imageblit = drm_fb_helper_sys_imageblit,
+	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_blank = drm_fb_helper_blank,
+	.fb_setcmap = drm_fb_helper_setcmap,
+};
+
+static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
+			       struct drm_fb_helper_surface_size *sizes)
+{
+	struct hibmc_fbdev *hi_fbdev =
+		container_of(helper, struct hibmc_fbdev, helper);
+	struct hibmc_drm_private *priv = helper->dev->dev_private;
+	struct fb_info *info;
+	struct drm_mode_fb_cmd2 mode_cmd;
+	struct drm_gem_object *gobj = NULL;
+	int ret = 0;
+	int ret1;
+	size_t size;
+	unsigned int bytes_per_pixel;
+	struct hibmc_bo *bo = NULL;
+
+	DRM_DEBUG_DRIVER("surface width(%d), height(%d) and bpp(%d)\n",
+			 sizes->surface_width, sizes->surface_height,
+			 sizes->surface_bpp);
+	sizes->surface_depth = 32;
+
+	bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+	mode_cmd.pitches[0] = mode_cmd.width * bytes_per_pixel;
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height);
+
+	ret = hibmcfb_create_object(priv, &mode_cmd, &gobj);
+	if (ret) {
+		DRM_ERROR("failed to create fbcon backing object: %d\n", ret);
+		return -ENOMEM;
+	}
+
+	bo = gem_to_hibmc_bo(gobj);
+
+	ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret) {
+		DRM_ERROR("failed to reserve ttm_bo: %d\n", ret);
+		goto out_unref_gem;
+	}
+
+	ret = hibmc_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
+	if (ret) {
+		DRM_ERROR("failed to pin fbcon: %d\n", ret);
+		goto out_unreserve_ttm_bo;
+	}
+
+	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+	if (ret) {
+		DRM_ERROR("failed to kmap fbcon: %d\n", ret);
+		goto out_unpin_bo;
+	}
+	ttm_bo_unreserve(&bo->bo);
+
+	info = drm_fb_helper_alloc_fbi(helper);
+	if (IS_ERR(info)) {
+		ret = PTR_ERR(info);
+		DRM_ERROR("failed to allocate fbi: %d\n", ret);
+		goto out_release_fbi;
+	}
+
+	info->par = hi_fbdev;
+
+	hi_fbdev->fb = hibmc_framebuffer_init(priv->dev, &mode_cmd, gobj);
+	if (IS_ERR(hi_fbdev->fb)) {
+		ret = PTR_ERR(info);
+		DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
+		goto out_release_fbi;
+	}
+
+	priv->fbdev->size = size;
+	hi_fbdev->helper.fb = &hi_fbdev->fb->fb;
+
+	strcpy(info->fix.id, "hibmcdrmfb");
+
+	info->flags = FBINFO_DEFAULT;
+	info->fbops = &hibmc_drm_fb_ops;
+
+	drm_fb_helper_fill_fix(info, hi_fbdev->fb->fb.pitches[0],
+			       hi_fbdev->fb->fb.depth);
+	drm_fb_helper_fill_var(info, &priv->fbdev->helper, sizes->fb_width,
+			       sizes->fb_height);
+
+	info->screen_base = bo->kmap.virtual;
+	info->screen_size = size;
+
+	info->fix.smem_start = bo->bo.mem.bus.offset + bo->bo.mem.bus.base;
+	info->fix.smem_len = size;
+	return 0;
+
+out_release_fbi:
+	drm_fb_helper_release_fbi(helper);
+	ret1 = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret1) {
+		DRM_ERROR("failed to rsv ttm_bo when release fbi: %d\n", ret1);
+		goto out_unref_gem;
+	}
+	ttm_bo_kunmap(&bo->kmap);
+out_unpin_bo:
+	hibmc_bo_unpin(bo);
+out_unreserve_ttm_bo:
+	ttm_bo_unreserve(&bo->bo);
+out_unref_gem:
+	drm_gem_object_unreference_unlocked(gobj);
+
+	return ret;
+}
+
+static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
+{
+	struct hibmc_framebuffer *gfb = fbdev->fb;
+	struct drm_fb_helper *fbh = &fbdev->helper;
+
+	drm_fb_helper_unregister_fbi(fbh);
+	drm_fb_helper_release_fbi(fbh);
+
+	drm_fb_helper_fini(fbh);
+
+	if (gfb)
+		drm_framebuffer_unreference(&gfb->fb);
+}
+
+static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
+	.fb_probe = hibmc_drm_fb_create,
+};
+
+int hibmc_fbdev_init(struct hibmc_drm_private *priv)
+{
+	int ret;
+	struct fb_var_screeninfo *var;
+	struct fb_fix_screeninfo *fix;
+	struct hibmc_fbdev *hifbdev;
+
+	hifbdev = devm_kzalloc(priv->dev->dev, sizeof(*hifbdev), GFP_KERNEL);
+	if (!hifbdev) {
+		DRM_ERROR("failed to allocate hibmc_fbdev\n");
+		return -ENOMEM;
+	}
+
+	priv->fbdev = hifbdev;
+	drm_fb_helper_prepare(priv->dev, &hifbdev->helper,
+			      &hibmc_fbdev_helper_funcs);
+
+	/* Now just one crtc and one channel */
+	ret = drm_fb_helper_init(priv->dev,
+				 &hifbdev->helper, 1, 1);
+	if (ret) {
+		DRM_ERROR("failed to initialize fb helper: %d\n", ret);
+		return ret;
+	}
+
+	ret = drm_fb_helper_single_add_all_connectors(&hifbdev->helper);
+	if (ret) {
+		DRM_ERROR("failed to add all connectors: %d\n", ret);
+		goto fini;
+	}
+
+	ret = drm_fb_helper_initial_config(&hifbdev->helper, 16);
+	if (ret) {
+		DRM_ERROR("failed to setup initial conn config: %d\n", ret);
+		goto fini;
+	}
+
+	var = &hifbdev->helper.fbdev->var;
+	fix = &hifbdev->helper.fbdev->fix;
+
+	DRM_DEBUG_DRIVER("Member of info->var is :\n"
+			 "xres=%d\n"
+			 "yres=%d\n"
+			 "xres_virtual=%d\n"
+			 "yres_virtual=%d\n"
+			 "xoffset=%d\n"
+			 "yoffset=%d\n"
+			 "bits_per_pixel=%d\n"
+			 "...\n", var->xres, var->yres, var->xres_virtual,
+			 var->yres_virtual, var->xoffset, var->yoffset,
+			 var->bits_per_pixel);
+	DRM_DEBUG_DRIVER("Member of info->fix is :\n"
+			 "smem_start=%lx\n"
+			 "smem_len=%d\n"
+			 "type=%d\n"
+			 "type_aux=%d\n"
+			 "visual=%d\n"
+			 "xpanstep=%d\n"
+			 "ypanstep=%d\n"
+			 "ywrapstep=%d\n"
+			 "line_length=%d\n"
+			 "accel=%d\n"
+			 "capabilities=%d\n"
+			 "...\n", fix->smem_start, fix->smem_len, fix->type,
+			 fix->type_aux, fix->visual, fix->xpanstep,
+			 fix->ypanstep, fix->ywrapstep, fix->line_length,
+			 fix->accel, fix->capabilities);
+
+	return 0;
+
+fini:
+	drm_fb_helper_fini(&hifbdev->helper);
+	return ret;
+}
+
+void hibmc_fbdev_fini(struct hibmc_drm_private *priv)
+{
+	if (!priv->fbdev)
+		return;
+
+	hibmc_fbdev_destroy(priv->fbdev);
+	priv->fbdev = NULL;
+}

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.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.
+ *
+ */
+
+#ifndef HIBMC_DRM_HW_H
+#define HIBMC_DRM_HW_H
+
+/* register definition */
+#define HIBMC_MISC_CTRL				0x4
+
+#define HIBMC_MSCCTL_LOCALMEM_RESET(x)		((x) << 6)
+#define HIBMC_MSCCTL_LOCALMEM_RESET_MASK	0x40
+
+#define HIBMC_CURRENT_GATE			0x000040
+#define HIBMC_CURR_GATE_DISPLAY(x)		((x) << 2)
+#define HIBMC_CURR_GATE_DISPLAY_MASK		0x4
+
+#define HIBMC_CURR_GATE_LOCALMEM(x)		((x) << 1)
+#define HIBMC_CURR_GATE_LOCALMEM_MASK		0x2
+
+#define HIBMC_MODE0_GATE			0x000044
+#define HIBMC_MODE1_GATE			0x000048
+#define HIBMC_POWER_MODE_CTRL			0x00004C
+
+#define HIBMC_PW_MODE_CTL_OSC_INPUT(x)		((x) << 3)
+#define HIBMC_PW_MODE_CTL_OSC_INPUT_MASK	0x8
+
+#define HIBMC_PW_MODE_CTL_MODE(x)		((x) << 0)
+#define HIBMC_PW_MODE_CTL_MODE_MASK		0x03
+#define HIBMC_PW_MODE_CTL_MODE_SHIFT		0
+
+#define HIBMC_PW_MODE_CTL_MODE_MODE0		0
+#define HIBMC_PW_MODE_CTL_MODE_MODE1		1
+#define HIBMC_PW_MODE_CTL_MODE_SLEEP		2
+
+#define HIBMC_PANEL_PLL_CTRL			0x00005C
+#define HIBMC_CRT_PLL_CTRL			0x000060
+
+#define HIBMC_PLL_CTRL_BYPASS(x)		((x) << 18)
+#define HIBMC_PLL_CTRL_BYPASS_MASK		0x40000
+
+#define HIBMC_PLL_CTRL_POWER(x)			((x) << 17)
+#define HIBMC_PLL_CTRL_POWER_MASK		0x20000
+
+#define HIBMC_PLL_CTRL_INPUT(x)			((x) << 16)
+#define HIBMC_PLL_CTRL_INPUT_MASK		0x10000
+
+#define HIBMC_PLL_CTRL_POD(x)			((x) << 14)
+#define HIBMC_PLL_CTRL_POD_MASK			0xC000
+
+#define HIBMC_PLL_CTRL_OD(x)			((x) << 12)
+#define HIBMC_PLL_CTRL_OD_MASK			0x3000
+
+#define HIBMC_PLL_CTRL_N(x)			((x) << 8)
+#define HIBMC_PLL_CTRL_N_MASK			0xF00
+
+#define HIBMC_PLL_CTRL_M(x)			((x) << 0)
+#define HIBMC_PLL_CTRL_M_MASK			0xFF
+
+#define HIBMC_CRT_DISP_CTL			0x80200
+
+#define HIBMC_CRT_DISP_CTL_CRTSELECT(x)		((x) << 25)
+#define HIBMC_CRT_DISP_CTL_CRTSELECT_MASK	0x2000000
+
+#define HIBMC_CRTSELECT_CRT			1
+
+#define HIBMC_CRT_DISP_CTL_CLOCK_PHASE(x)	((x) << 14)
+#define HIBMC_CRT_DISP_CTL_CLOCK_PHASE_MASK	0x4000
+
+#define HIBMC_CRT_DISP_CTL_VSYNC_PHASE(x)	((x) << 13)
+#define HIBMC_CRT_DISP_CTL_VSYNC_PHASE_MASK	0x2000
+
+#define HIBMC_CRT_DISP_CTL_HSYNC_PHASE(x)	((x) << 12)
+#define HIBMC_CRT_DISP_CTL_HSYNC_PHASE_MASK	0x1000
+
+#define HIBMC_CRT_DISP_CTL_TIMING(x)		((x) << 8)
+#define HIBMC_CRT_DISP_CTL_TIMING_MASK		0x100
+
+#define HIBMC_CRT_DISP_CTL_PLANE(x)		((x) << 2)
+#define HIBMC_CRT_DISP_CTL_PLANE_MASK		4
+
+#define HIBMC_CRT_DISP_CTL_FORMAT(x)		((x) << 0)
+#define HIBMC_CRT_DISP_CTL_FORMAT_MASK		0x03
+
+#define HIBMC_CRT_FB_ADDRESS			0x080204
+
+#define HIBMC_CRT_FB_WIDTH			0x080208
+#define HIBMC_CRT_FB_WIDTH_WIDTH(x)		((x) << 16)
+#define HIBMC_CRT_FB_WIDTH_WIDTH_MASK		0x3FFF0000
+#define HIBMC_CRT_FB_WIDTH_OFFS(x)		((x) << 0)
+#define HIBMC_CRT_FB_WIDTH_OFFS_MASK		0x3FFF
+
+#define HIBMC_CRT_HORZ_TOTAL			0x08020C
+#define HIBMC_CRT_HORZ_TOTAL_TOTAL(x)		((x) << 16)
+#define HIBMC_CRT_HORZ_TOTAL_TOTAL_MASK		0xFFF0000
+
+#define HIBMC_CRT_HORZ_TOTAL_DISP_END(x)	((x) << 0)
+#define HIBMC_CRT_HORZ_TOTAL_DISP_END_MASK	0xFFF
+
+#define HIBMC_CRT_HORZ_SYNC			0x080210
+#define HIBMC_CRT_HORZ_SYNC_WIDTH(x)		((x) << 16)
+#define HIBMC_CRT_HORZ_SYNC_WIDTH_MASK		0xFF0000
+
+#define HIBMC_CRT_HORZ_SYNC_START(x)		((x) << 0)
+#define HIBMC_CRT_HORZ_SYNC_START_MASK		0xFFF
+
+#define HIBMC_CRT_VERT_TOTAL			0x080214
+#define HIBMC_CRT_VERT_TOTAL_TOTAL(x)		((x) << 16)
+#define HIBMC_CRT_VERT_TOTAL_TOTAL_MASK		0x7FFF0000
+
+#define HIBMC_CRT_VERT_TOTAL_DISP_END(x)	((x) << 0)
+#define HIBMC_CRT_VERT_TOTAL_DISP_END_MASK	0x7FF
+
+#define HIBMC_CRT_VERT_SYNC			0x080218
+#define HIBMC_CRT_VERT_SYNC_HEIGHT(x)		((x) << 16)
+#define HIBMC_CRT_VERT_SYNC_HEIGHT_MASK		0x3F0000
+
+#define HIBMC_CRT_VERT_SYNC_START(x)		((x) << 0)
+#define HIBMC_CRT_VERT_SYNC_START_MASK		0x7FF
+
+/* Auto Centering */
+#define HIBMC_CRT_AUTO_CENTERING_TL		0x080280
+#define HIBMC_CRT_AUTO_CENTERING_TL_TOP(x)	((x) << 16)
+#define HIBMC_CRT_AUTO_CENTERING_TL_TOP_MASK	0x7FF0000
+
+#define HIBMC_CRT_AUTO_CENTERING_TL_LEFT(x)	((x) << 0)
+#define HIBMC_CRT_AUTO_CENTERING_TL_LEFT_MASK	0x7FF
+
+#define HIBMC_CRT_AUTO_CENTERING_BR		0x080284
+#define HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM(x)	((x) << 16)
+#define HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM_MASK	0x7FF0000
+
+#define HIBMC_CRT_AUTO_CENTERING_BR_RIGHT(x)	((x) << 0)
+#define HIBMC_CRT_AUTO_CENTERING_BR_RIGHT_MASK	0x7FF
+
+/* register to control panel output */
+#define HIBMC_DISPLAY_CONTROL_HISILE		0x80288
+#define HIBMC_DISPLAY_CONTROL_FPVDDEN(x)	((x) << 0)
+#define HIBMC_DISPLAY_CONTROL_PANELDATE(x)	((x) << 1)
+#define HIBMC_DISPLAY_CONTROL_FPEN(x)		((x) << 2)
+#define HIBMC_DISPLAY_CONTROL_VBIASEN(x)	((x) << 3)
+
+#define HIBMC_RAW_INTERRUPT			0x80290
+#define HIBMC_RAW_INTERRUPT_VBLANK(x)		((x) << 2)
+#define HIBMC_RAW_INTERRUPT_VBLANK_MASK		0x4
+
+#define HIBMC_RAW_INTERRUPT_EN			0x80298
+#define HIBMC_RAW_INTERRUPT_EN_VBLANK(x)	((x) << 2)
+#define HIBMC_RAW_INTERRUPT_EN_VBLANK_MASK	0x4
+
+/* register and values for PLL control */
+#define CRT_PLL1_HS				0x802a8
+#define CRT_PLL1_HS_OUTER_BYPASS(x)		((x) << 30)
+#define CRT_PLL1_HS_INTER_BYPASS(x)		((x) << 29)
+#define CRT_PLL1_HS_POWERON(x)			((x) << 24)
+
+#define CRT_PLL1_HS_25MHZ			0x23d40f02
+#define CRT_PLL1_HS_40MHZ			0x23940801
+#define CRT_PLL1_HS_65MHZ			0x23940d01
+#define CRT_PLL1_HS_78MHZ			0x23540F82
+#define CRT_PLL1_HS_74MHZ			0x23941dc2
+#define CRT_PLL1_HS_80MHZ			0x23941001
+#define CRT_PLL1_HS_80MHZ_1152			0x23540fc2
+#define CRT_PLL1_HS_108MHZ			0x23b41b01
+#define CRT_PLL1_HS_162MHZ			0x23480681
+#define CRT_PLL1_HS_148MHZ			0x23541dc2
+#define CRT_PLL1_HS_193MHZ			0x234807c1
+
+#define CRT_PLL2_HS				0x802ac
+#define CRT_PLL2_HS_25MHZ			0x206B851E
+#define CRT_PLL2_HS_40MHZ			0x30000000
+#define CRT_PLL2_HS_65MHZ			0x40000000
+#define CRT_PLL2_HS_78MHZ			0x50E147AE
+#define CRT_PLL2_HS_74MHZ			0x602B6AE7
+#define CRT_PLL2_HS_80MHZ			0x70000000
+#define CRT_PLL2_HS_108MHZ			0x80000000
+#define CRT_PLL2_HS_162MHZ			0xA0000000
+#define CRT_PLL2_HS_148MHZ			0xB0CCCCCD
+#define CRT_PLL2_HS_193MHZ			0xC0872B02
+
+#define HIBMC_FIELD(field, value) (field(value) & field##_MASK)
+#endif

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.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 <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+static int hibmc_connector_get_modes(struct drm_connector *connector)
+{
+	return drm_add_modes_noedid(connector, 800, 600);
+}
+
+static int hibmc_connector_mode_valid(struct drm_connector *connector,
+				      struct drm_display_mode *mode)
+{
+	return MODE_OK;
+}
+
+static struct drm_encoder *
+hibmc_connector_best_encoder(struct drm_connector *connector)
+{
+	return drm_encoder_find(connector->dev, connector->encoder_ids[0]);
+}
+
+static enum drm_connector_status hibmc_connector_detect(struct drm_connector
+						 *connector, bool force)
+{
+	return connector_status_connected;
+}
+
+static const struct drm_connector_helper_funcs
+	hibmc_connector_helper_funcs = {
+	.get_modes = hibmc_connector_get_modes,
+	.mode_valid = hibmc_connector_mode_valid,
+	.best_encoder = hibmc_connector_best_encoder,
+};
+
+static const struct drm_connector_funcs hibmc_connector_funcs = {
+	.dpms = drm_atomic_helper_connector_dpms,
+	.detect = hibmc_connector_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static struct drm_connector *
+hibmc_connector_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_connector *connector;
+	int ret;
+
+	connector = devm_kzalloc(dev->dev, sizeof(*connector), GFP_KERNEL);
+	if (!connector) {
+		DRM_ERROR("failed to alloc memory when init connector\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ret = drm_connector_init(dev, connector,
+				 &hibmc_connector_funcs,
+				 DRM_MODE_CONNECTOR_VGA);
+	if (ret) {
+		DRM_ERROR("failed to init connector: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+	drm_connector_helper_add(connector,
+				 &hibmc_connector_helper_funcs);
+
+	return connector;
+}
+
+static void hibmc_encoder_mode_set(struct drm_encoder *encoder,
+				   struct drm_display_mode *mode,
+				   struct drm_display_mode *adj_mode)
+{
+	u32 reg;
+	struct drm_device *dev = encoder->dev;
+	struct hibmc_drm_private *priv = dev->dev_private;
+
+	reg = readl(priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
+	reg |= HIBMC_DISPLAY_CONTROL_FPVDDEN(1);
+	reg |= HIBMC_DISPLAY_CONTROL_PANELDATE(1);
+	reg |= HIBMC_DISPLAY_CONTROL_FPEN(1);
+	reg |= HIBMC_DISPLAY_CONTROL_VBIASEN(1);
+	writel(reg, priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
+}
+
+static const struct drm_encoder_helper_funcs hibmc_encoder_helper_funcs = {
+	.mode_set = hibmc_encoder_mode_set,
+};
+
+static const struct drm_encoder_funcs hibmc_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+int hibmc_vdac_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+	int ret;
+
+	connector = hibmc_connector_init(priv);
+	if (IS_ERR(connector)) {
+		DRM_ERROR("failed to create connector: %ld\n",
+			  PTR_ERR(connector));
+		return PTR_ERR(connector);
+	}
+
+	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
+	if (!encoder) {
+		DRM_ERROR("failed to alloc memory when init encoder\n");
+		return -ENOMEM;
+	}
+
+	encoder->possible_crtcs = 0x1;
+	ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
+			       DRM_MODE_ENCODER_DAC, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init encoder: %d\n", ret);
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
+	drm_mode_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}