video/drm/rockchip_display.c

/*
 * (C) Copyright 2008-2017 Fuzhou Rockchip Electronics Co., Ltd
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <asm/unaligned.h>
#include <config.h>
#include <common.h>
#include <errno.h>
#include <libfdt.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <linux/list.h>
#include <linux/compat.h>
#include <linux/media-bus-format.h>
#include <malloc.h>
#include <video.h>
#include <video_rockchip.h>
#include <dm/device.h>
#include <dm/uclass-internal.h>
#include <asm/arch-rockchip/resource_img.h>

#include "bmp_helper.h"
#include "rockchip_display.h"
#include "rockchip_crtc.h"
#include "rockchip_connector.h"
#include "rockchip_phy.h"
#include "rockchip_panel.h"
#include <dm.h>
#include <dm/of_access.h>
#include <dm/ofnode.h>

#define DRIVER_VERSION	"v1.0.0"

/***********************************************************************
 *  Rockchip UBOOT DRM driver version
 *
 *  v1.0.0	: add basic version for rockchip drm driver(hjc)
 *
 **********************************************************************/

#define RK_BLK_SIZE 512

DECLARE_GLOBAL_DATA_PTR;
static LIST_HEAD(rockchip_display_list);
static LIST_HEAD(logo_cache_list);

static unsigned long memory_start;
static unsigned long memory_end;

static void init_display_buffer(ulong base)
{
	memory_start = base + DRM_ROCKCHIP_FB_SIZE;
	memory_end = memory_start;
}

static void *get_display_buffer(int size)
{
	unsigned long roundup_memory = roundup(memory_end, PAGE_SIZE);
	void *buf;

	if (roundup_memory + size > memory_start + MEMORY_POOL_SIZE) {
		printf("failed to alloc %dbyte memory to display\n", size);
		return NULL;
	}
	buf = (void *)roundup_memory;

	memory_end = roundup_memory + size;

	return buf;
}

static unsigned long get_display_size(void)
{
	return memory_end - memory_start;
}

static bool can_direct_logo(int bpp)
{
	return bpp == 24 || bpp == 32;
}


static struct udevice *get_panel_device(struct display_state *state, ofnode conn_node)
{
	struct panel_state *panel_state = &state->panel_state;
	struct udevice *dev;
	struct connector_state *conn_state = &state->conn_state;
	ofnode node, ports_node, port_node;
	struct device_node *port, *panel, *ep;
	int ph;
	int ret;

	node = dev_read_subnode(conn_state->dev, "panel");
	if (ofnode_valid(node) &&
	    of_device_is_available(ofnode_to_np(node))) {
		ret = uclass_get_device_by_ofnode(UCLASS_PANEL, node, &dev);
		if (!ret) {
			panel_state->node = node;
			return dev;
		}
	}

	/* TODO: this path not tested */
	ports_node = dev_read_subnode(conn_state->dev, "ports");
	if (!ofnode_valid(ports_node))
		return NULL;

	ofnode_for_each_subnode(port_node, ports_node) {
		ofnode_for_each_subnode(node, port_node) {
			ph = ofnode_read_u32_default(node, "remote-endpoint", -1);
			if (!ph)
				continue;
			ep = of_find_node_by_phandle(ph);
			if (!ofnode_valid(np_to_ofnode(ep))) {
				printf("Warn: can't find endpoint from phdl\n");
				continue;
			}
			port = of_get_parent(ep);
			if (!ofnode_valid(np_to_ofnode(port))) {
				printf("Warn: can't find port node\n");
				continue;
			}
			panel = of_get_parent(port);
			if (!ofnode_valid(np_to_ofnode(panel))) {
				printf("Warn: can't find panel node\n");
				continue;
			}
			ret = uclass_get_device_by_ofnode(UCLASS_PANEL,
							  np_to_ofnode(panel),
							  &dev);
			if (!ret) {
				panel_state->node = np_to_ofnode(panel);
				return dev;
			}
		}
	}

	return NULL;
}

static int connector_phy_init(struct display_state *state)
{
	struct connector_state *conn_state = &state->conn_state;
	const struct rockchip_phy *phy;
	struct udevice *dev;
	int ret;

	ret = uclass_get_device_by_phandle(UCLASS_PHY, conn_state->dev, "phys",
					   &dev);
	if (ret) {
		debug("Warn: can't find phy driver\n");
		return 0;
	}

	phy = (const struct rockchip_phy *)dev_get_driver_data(dev);
	if (!phy) {
		printf("failed to find phy driver\n");
		return 0;
	}

	conn_state->phy_dev = dev;
	conn_state->phy_node = dev->node;

	if (!phy->funcs || !phy->funcs->init ||
	    phy->funcs->init(state)) {
		printf("failed to init phy driver\n");
		return -EINVAL;
	}

	conn_state->phy = phy;
	return 0;
}

static int connector_panel_init(struct display_state *state)
{
	struct connector_state *conn_state = &state->conn_state;
	struct panel_state *panel_state = &state->panel_state;
	struct udevice *dev;
	ofnode conn_node = conn_state->node;
	const struct rockchip_panel *panel;
	ofnode dsp_lut_node;
	int ret, len;

	dm_scan_fdt_dev(conn_state->dev);

	dev = get_panel_device(state, conn_node);
	if (!dev) {
		return 0;
	}

	panel = (const struct rockchip_panel *)dev_get_driver_data(dev);
	if (!panel) {
		printf("failed to find panel driver\n");
		return 0;
	}

	panel_state->dev = dev;
	panel_state->panel = panel;

	if (panel->funcs && panel->funcs->init) {
		ret = panel->funcs->init(state);
		if (ret) {
			printf("failed to init panel driver\n");
			return ret;
		}
	}

	dsp_lut_node = dev_read_subnode(dev, "dsp-lut");
	if (!ofnode_valid(dsp_lut_node)) {
		debug("%s can not find dsp-lut node\n", __func__);
		return 0;
	}

	ofnode_get_property(dsp_lut_node, "gamma-lut", &len);
	if (len > 0) {
		conn_state->gamma.size = len / sizeof(u32);
		conn_state->gamma.lut = malloc(len);
		if (!conn_state->gamma.lut) {
			printf("malloc gamma lut failed\n");
			return -ENOMEM;
		}
		ret = ofnode_read_u32_array(dsp_lut_node, "gamma-lut",
					    conn_state->gamma.lut,
					    conn_state->gamma.size);
		if (ret) {
			printf("Cannot decode gamma_lut\n");
			conn_state->gamma.lut = NULL;
			return -EINVAL;
		}
		panel_state->dsp_lut_node = dsp_lut_node;
	}

	return 0;
}

int drm_mode_vrefresh(const struct drm_display_mode *mode)
{
	int refresh = 0;
	unsigned int calc_val;

	if (mode->vrefresh > 0) {
		refresh = mode->vrefresh;
	} else if (mode->htotal > 0 && mode->vtotal > 0) {
		int vtotal;

		vtotal = mode->vtotal;
		/* work out vrefresh the value will be x1000 */
		calc_val = (mode->clock * 1000);
		calc_val /= mode->htotal;
		refresh = (calc_val + vtotal / 2) / vtotal;

		if (mode->flags & DRM_MODE_FLAG_INTERLACE)
			refresh *= 2;
		if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
			refresh /= 2;
		if (mode->vscan > 1)
			refresh /= mode->vscan;
	}
	return refresh;
}

static int display_get_timing_from_dts(struct panel_state *panel_state,
				       struct drm_display_mode *mode)
{
	int phandle;
	int hactive, vactive, pixelclock;
	int hfront_porch, hback_porch, hsync_len;
	int vfront_porch, vback_porch, vsync_len;
	int val, flags = 0;
	ofnode timing, native_mode;

	timing = dev_read_subnode(panel_state->dev, "display-timings");
	if (!ofnode_valid(timing))
		return -ENODEV;

	native_mode = ofnode_find_subnode(timing, "timing");
	if (!ofnode_valid(native_mode)) {
		phandle = ofnode_read_u32_default(timing, "native-mode", -1);
		native_mode = np_to_ofnode(of_find_node_by_phandle(phandle));
		if (!ofnode_valid(native_mode)) {
			printf("failed to get display timings from DT\n");
			return -ENXIO;
		}
	}

#define FDT_GET_INT(val, name) \
	val = ofnode_read_s32_default(native_mode, name, -1); \
	if (val < 0) { \
		printf("Can't get %s\n", name); \
		return -ENXIO; \
	}

	FDT_GET_INT(hactive, "hactive");
	FDT_GET_INT(vactive, "vactive");
	FDT_GET_INT(pixelclock, "clock-frequency");
	FDT_GET_INT(hsync_len, "hsync-len");
	FDT_GET_INT(hfront_porch, "hfront-porch");
	FDT_GET_INT(hback_porch, "hback-porch");
	FDT_GET_INT(vsync_len, "vsync-len");
	FDT_GET_INT(vfront_porch, "vfront-porch");
	FDT_GET_INT(vback_porch, "vback-porch");
	FDT_GET_INT(val, "hsync-active");
	flags |= val ? DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
	FDT_GET_INT(val, "vsync-active");
	flags |= val ? DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
	FDT_GET_INT(val, "pixelclk-active");
	flags |= val ? DRM_MODE_FLAG_PPIXDATA : 0;

	mode->hdisplay = hactive;
	mode->hsync_start = mode->hdisplay + hfront_porch;
	mode->hsync_end = mode->hsync_start + hsync_len;
	mode->htotal = mode->hsync_end + hback_porch;

	mode->vdisplay = vactive;
	mode->vsync_start = mode->vdisplay + vfront_porch;
	mode->vsync_end = mode->vsync_start + vsync_len;
	mode->vtotal = mode->vsync_end + vback_porch;

	mode->clock = pixelclock / 1000;
	mode->flags = flags;

	return 0;
}

/**
 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
 * @p: mode
 * @adjust_flags: a combination of adjustment flags
 *
 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
 *
 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
 *   interlaced modes.
 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
 *   buffers containing two eyes (only adjust the timings when needed, eg. for
 *   "frame packing" or "side by side full").
 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
 *   be performed for doublescan and vscan > 1 modes respectively.
 */
void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
{
	if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
		return;

	if (p->flags & DRM_MODE_FLAG_DBLCLK)
		p->crtc_clock = 2 * p->clock;
	else
		p->crtc_clock = p->clock;
	p->crtc_hdisplay = p->hdisplay;
	p->crtc_hsync_start = p->hsync_start;
	p->crtc_hsync_end = p->hsync_end;
	p->crtc_htotal = p->htotal;
	p->crtc_hskew = p->hskew;
	p->crtc_vdisplay = p->vdisplay;
	p->crtc_vsync_start = p->vsync_start;
	p->crtc_vsync_end = p->vsync_end;
	p->crtc_vtotal = p->vtotal;

	if (p->flags & DRM_MODE_FLAG_INTERLACE) {
		if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
			p->crtc_vdisplay /= 2;
			p->crtc_vsync_start /= 2;
			p->crtc_vsync_end /= 2;
			p->crtc_vtotal /= 2;
		}
	}

	if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
		if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
			p->crtc_vdisplay *= 2;
			p->crtc_vsync_start *= 2;
			p->crtc_vsync_end *= 2;
			p->crtc_vtotal *= 2;
		}
	}

	if (!(adjust_flags & CRTC_NO_VSCAN)) {
		if (p->vscan > 1) {
			p->crtc_vdisplay *= p->vscan;
			p->crtc_vsync_start *= p->vscan;
			p->crtc_vsync_end *= p->vscan;
			p->crtc_vtotal *= p->vscan;
		}
	}

	if (adjust_flags & CRTC_STEREO_DOUBLE) {
		unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;

		switch (layout) {
		case DRM_MODE_FLAG_3D_FRAME_PACKING:
			p->crtc_clock *= 2;
			p->crtc_vdisplay += p->crtc_vtotal;
			p->crtc_vsync_start += p->crtc_vtotal;
			p->crtc_vsync_end += p->crtc_vtotal;
			p->crtc_vtotal += p->crtc_vtotal;
			break;
		}
	}

	p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
	p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
	p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
	p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
}

static int display_get_timing(struct display_state *state)
{
	struct connector_state *conn_state = &state->conn_state;
	const struct rockchip_connector *conn = conn_state->connector;
	const struct rockchip_connector_funcs *conn_funcs = conn->funcs;
	struct drm_display_mode *mode = &conn_state->mode;
	const struct drm_display_mode *m;
	struct panel_state *panel_state = &state->panel_state;
	const struct rockchip_panel *panel = panel_state->panel;
	const struct rockchip_panel_funcs *panel_funcs = panel->funcs;
	ofnode panel_node = panel_state->node;
	int ret;

	if (ofnode_valid(panel_node) && !display_get_timing_from_dts(panel_state, mode)) {
		printf("Using display timing dts\n");
		goto done;
	}

	if (panel->data) {
		m = (const struct drm_display_mode *)panel->data;
		memcpy(mode, m, sizeof(*m));
		printf("Using display timing from compatible panel driver\n");
		goto done;
	}

	if (conn_funcs->get_edid && !conn_funcs->get_edid(state)) {
		int panel_bits_per_colourp;

		/* In order to read EDID, the panel needs to be powered on */
		if (panel_funcs->prepare) {
			ret = panel_funcs->prepare(state);
			if (ret) {
				printf("failed to prepare panel\n");
				return ret;
			}
		}

		if (!edid_get_drm_mode((void *)&conn_state->edid,
				     sizeof(conn_state->edid), mode,
				     &panel_bits_per_colourp)) {
			printf("Using display timing from edid\n");
			edid_print_info((void *)&conn_state->edid);
			goto done;
		} else {
			if (panel_funcs->unprepare)
				panel_funcs->unprepare(state);
		}
	}

	printf("failed to find display timing\n");
	return -ENODEV;
done:
	printf("Detailed mode clock %u kHz, flags[%x]\n"
	       "    H: %04d %04d %04d %04d\n"
	       "    V: %04d %04d %04d %04d\n"
	       "bus_format: %x\n",
	       mode->clock, mode->flags,
	       mode->hdisplay, mode->hsync_start,
	       mode->hsync_end, mode->htotal,
	       mode->vdisplay, mode->vsync_start,
	       mode->vsync_end, mode->vtotal,
	       conn_state->bus_format);

	return 0;
}

static int display_init(struct display_state *state)
{
	struct connector_state *conn_state = &state->conn_state;
	const struct rockchip_connector *conn = conn_state->connector;
	const struct rockchip_connector_funcs *conn_funcs = conn->funcs;
	struct crtc_state *crtc_state = &state->crtc_state;
	const struct rockchip_crtc *crtc = crtc_state->crtc;
	const struct rockchip_crtc_funcs *crtc_funcs = crtc->funcs;
	struct drm_display_mode *mode = &conn_state->mode;
	int ret = 0;
	static bool __print_once = false;

	if (!__print_once) {
		__print_once = true;
		printf("Rockchip UBOOT DRM driver version: %s\n", DRIVER_VERSION);
	}

	if (state->is_init)
		return 0;

	if (!conn_funcs || !crtc_funcs) {
		printf("failed to find connector or crtc functions\n");
		return -ENXIO;
	}

	if (conn_funcs->init) {
		ret = conn_funcs->init(state);
		if (ret)
			goto deinit;
	}
	/*
	 * support hotplug, but not connect;
	 */
	if (conn_funcs->detect) {
		ret = conn_funcs->detect(state);
		if (!ret)
			goto deinit;
	}

	if (conn_funcs->get_timing) {
		ret = conn_funcs->get_timing(state);
		if (ret)
			goto deinit;
	} else {
		ret = display_get_timing(state);
		if (ret)
			goto deinit;
	}
	drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);

	if (crtc_funcs->init) {
		ret = crtc_funcs->init(state);
		if (ret)
			goto deinit;
	}

	state->is_init = 1;

	return 0;

deinit:
	if (conn_funcs->deinit)
		conn_funcs->deinit(state);
	return ret;
}

int display_send_mcu_cmd(struct display_state *state, u32 type, u32 val)
{
	struct crtc_state *crtc_state = &state->crtc_state;
	const struct rockchip_crtc *crtc = crtc_state->crtc;
	const struct rockchip_crtc_funcs *crtc_funcs = crtc->funcs;
	int ret;

	if (!state->is_init)
		return -EINVAL;

	if (crtc_funcs->send_mcu_cmd) {
		ret = crtc_funcs->send_mcu_cmd(state, type, val);
		if (ret)
			return ret;
	}

	return 0;
}

static int display_set_plane(struct display_state *state)
{
	struct crtc_state *crtc_state = &state->crtc_state;
	const struct rockchip_crtc *crtc = crtc_state->crtc;
	const struct rockchip_crtc_funcs *crtc_funcs = crtc->funcs;
	int ret;

	if (!state->is_init)
		return -EINVAL;

	if (crtc_funcs->set_plane) {
		ret = crtc_funcs->set_plane(state);
		if (ret)
			return ret;
	}

	return 0;
}

static int display_enable(struct display_state *state)
{
	struct connector_state *conn_state = &state->conn_state;
	const struct rockchip_connector *conn = conn_state->connector;
	const struct rockchip_connector_funcs *conn_funcs = conn->funcs;
	struct crtc_state *crtc_state = &state->crtc_state;
	const struct rockchip_crtc *crtc = crtc_state->crtc;
	const struct rockchip_crtc_funcs *crtc_funcs = crtc->funcs;
	struct panel_state *panel_state = &state->panel_state;
	const struct rockchip_panel *panel = panel_state->panel;
	const struct rockchip_panel_funcs *panel_funcs = panel->funcs;
	int ret = 0;

	display_init(state);

	if (!state->is_init)
		return -EINVAL;

	if (state->is_enable)
		return 0;

	if (crtc_funcs->prepare) {
		ret = crtc_funcs->prepare(state);
		if (ret)
			return ret;
	}

	if (conn_funcs->prepare) {
		ret = conn_funcs->prepare(state);
		if (ret)
			goto unprepare_crtc;
	}

	if (panel_funcs->prepare) {
		ret = panel_funcs->prepare(state);
		if (ret) {
			printf("failed to prepare panel\n");
			goto unprepare_conn;
		}
	}

	if (crtc_funcs->enable) {
		ret = crtc_funcs->enable(state);
		if (ret)
			goto unprepare_panel;
	}

	if (conn_funcs->enable) {
		ret = conn_funcs->enable(state);
		if (ret)
			goto disable_crtc;
	}

	if (panel_funcs->enable) {
		ret = panel_funcs->enable(state);
		if (ret) {
			printf("failed to enable panel\n");
			goto disable_conn;
		}
	}

	state->is_enable = true;

	return 0;

disable_conn:
	if (conn_funcs->unprepare)
		conn_funcs->unprepare(state);
disable_crtc:
	if (crtc_funcs->disable)
		crtc_funcs->disable(state);
unprepare_crtc:
	if (crtc_funcs->unprepare)
		crtc_funcs->unprepare(state);
unprepare_panel:
	if (panel_funcs->unprepare)
		panel_funcs->unprepare(state);
unprepare_conn:
	if (conn_funcs->unprepare)
		conn_funcs->unprepare(state);
	return ret;
}

static int display_disable(struct display_state *state)
{
	struct connector_state *conn_state = &state->conn_state;
	const struct rockchip_connector *conn = conn_state->connector;
	const struct rockchip_connector_funcs *conn_funcs = conn->funcs;
	struct crtc_state *crtc_state = &state->crtc_state;
	const struct rockchip_crtc *crtc = crtc_state->crtc;
	const struct rockchip_crtc_funcs *crtc_funcs = crtc->funcs;
	struct panel_state *panel_state = &state->panel_state;
	const struct rockchip_panel *panel = panel_state->panel;
	const struct rockchip_panel_funcs *panel_funcs = panel->funcs;

	if (!state->is_init)
		return 0;

	if (!state->is_enable)
		return 0;

	if (panel_funcs->disable)
		panel_funcs->disable(state);

	if (crtc_funcs->disable)
		crtc_funcs->disable(state);

	if (conn_funcs->disable)
		conn_funcs->disable(state);

	if (panel_funcs->unprepare)
		panel_funcs->unprepare(state);

	if (conn_funcs->unprepare)
		conn_funcs->unprepare(state);

	state->is_enable = 0;
	state->is_init = 0;

	return 0;
}

static int display_logo(struct display_state *state)
{
	struct crtc_state *crtc_state = &state->crtc_state;
	struct connector_state *conn_state = &state->conn_state;
	struct logo_info *logo = &state->logo;
	int hdisplay, vdisplay;

	display_init(state);
	if (!state->is_init)
		return -ENODEV;

	switch (logo->bpp) {
	case 16:
		crtc_state->format = ROCKCHIP_FMT_RGB565;
		break;
	case 24:
		crtc_state->format = ROCKCHIP_FMT_RGB888;
		break;
	case 32:
		crtc_state->format = ROCKCHIP_FMT_ARGB8888;
		break;
	default:
		printf("can't support bmp bits[%d]\n", logo->bpp);
		return -EINVAL;
	}
	crtc_state->rb_swap = logo->bpp != 32;
	hdisplay = conn_state->mode.hdisplay;
	vdisplay = conn_state->mode.vdisplay;
	crtc_state->src_w = logo->width;
	crtc_state->src_h = logo->height;
	crtc_state->src_x = 0;
	crtc_state->src_y = 0;
	crtc_state->ymirror = logo->ymirror;

	crtc_state->dma_addr = (u32)(unsigned long)logo->mem + logo->offset;
	crtc_state->xvir = ALIGN(crtc_state->src_w * logo->bpp, 32) >> 5;

	if (logo->mode == ROCKCHIP_DISPLAY_FULLSCREEN) {
		crtc_state->crtc_x = 0;
		crtc_state->crtc_y = 0;
		crtc_state->crtc_w = hdisplay;
		crtc_state->crtc_h = vdisplay;
	} else {
		if (crtc_state->src_w >= hdisplay) {
			crtc_state->crtc_x = 0;
			crtc_state->crtc_w = hdisplay;
		} else {
			crtc_state->crtc_x = (hdisplay - crtc_state->src_w) / 2;
			crtc_state->crtc_w = crtc_state->src_w;
		}

		if (crtc_state->src_h >= vdisplay) {
			crtc_state->crtc_y = 0;
			crtc_state->crtc_h = vdisplay;
		} else {
			crtc_state->crtc_y = (vdisplay - crtc_state->src_h) / 2;
			crtc_state->crtc_h = crtc_state->src_h;
		}
	}

	display_set_plane(state);
	display_enable(state);

	return 0;
}

static int get_crtc_id(ofnode connect)
{
	int phandle;
	struct device_node *remote;
	int val;

	phandle = ofnode_read_u32_default(connect, "remote-endpoint", -1);
	if (phandle < 0)
		goto err;
	remote = of_find_node_by_phandle(phandle);
	val = ofnode_read_u32_default(np_to_ofnode(remote), "reg", -1);
	if (val < 0)
		goto err;

	return val;
err:
	printf("Can't get crtc id, default set to id = 0\n");
	return 0;
}

static int get_crtc_mcu_mode(struct crtc_state *crtc_state)
{
	ofnode mcu_node;
	int total_pixel, cs_pst, cs_pend, rw_pst, rw_pend;

	mcu_node = dev_read_subnode(crtc_state->dev, "mcu-timing");

#define FDT_GET_MCU_INT(val, name) \
	do { \
		val = ofnode_read_s32_default(mcu_node, name, -1); \
		if (val < 0) { \
			printf("Can't get %s\n", name); \
			return -ENXIO; \
		} \
	} while (0)

	FDT_GET_MCU_INT(total_pixel, "mcu-pix-total");
	FDT_GET_MCU_INT(cs_pst, "mcu-cs-pst");
	FDT_GET_MCU_INT(cs_pend, "mcu-cs-pend");
	FDT_GET_MCU_INT(rw_pst, "mcu-rw-pst");
	FDT_GET_MCU_INT(rw_pend, "mcu-rw-pend");

	crtc_state->mcu_timing.mcu_pix_total = total_pixel;
	crtc_state->mcu_timing.mcu_cs_pst = cs_pst;
	crtc_state->mcu_timing.mcu_cs_pend = cs_pend;
	crtc_state->mcu_timing.mcu_rw_pst = rw_pst;
	crtc_state->mcu_timing.mcu_rw_pend = rw_pend;

	return 0;
}

struct rockchip_logo_cache *find_or_alloc_logo_cache(const char *bmp)
{
	struct rockchip_logo_cache *tmp, *logo_cache = NULL;

	list_for_each_entry(tmp, &logo_cache_list, head) {
		if (!strcmp(tmp->name, bmp)) {
			logo_cache = tmp;
			break;
		}
	}

	if (!logo_cache) {
		logo_cache = malloc(sizeof(*logo_cache));
		if (!logo_cache) {
			printf("failed to alloc memory for logo cache\n");
			return NULL;
		}
		memset(logo_cache, 0, sizeof(*logo_cache));
		strcpy(logo_cache->name, bmp);
		INIT_LIST_HEAD(&logo_cache->head);
		list_add_tail(&logo_cache->head, &logo_cache_list);
	}

	return logo_cache;
}

/* Note: used only for rkfb kernel driver */
static int load_kernel_bmp_logo(struct logo_info *logo, const char *bmp_name)
{
#ifdef CONFIG_ROCKCHIP_RESOURCE_IMAGE
	void *dst = NULL;
	int len, size;
	struct bmp_header *header;

	if (!logo || !bmp_name)
		return -EINVAL;

	header = malloc(RK_BLK_SIZE);
	if (!header)
		return -ENOMEM;

	len = rockchip_read_resource_file(header, bmp_name, 0, RK_BLK_SIZE);
	if (len != RK_BLK_SIZE) {
		free(header);
		return -EINVAL;
	}
	size = get_unaligned_le32(&header->file_size);
	dst = (void *)(memory_start + MEMORY_POOL_SIZE / 2);
	len = rockchip_read_resource_file(dst, bmp_name, 0, size);
	if (len != size) {
		printf("failed to load bmp %s\n", bmp_name);
		free(header);
		return -ENOENT;
	}

	logo->mem = dst;

	return 0;
#endif
}

static int load_bmp_logo(struct logo_info *logo, const char *bmp_name)
{
#ifdef CONFIG_ROCKCHIP_RESOURCE_IMAGE
	struct rockchip_logo_cache *logo_cache;
	struct bmp_header *header;
	void *dst = NULL, *pdst;
	int size, len;
	int ret = 0;

	if (!logo || !bmp_name)
		return -EINVAL;
	logo_cache = find_or_alloc_logo_cache(bmp_name);
	if (!logo_cache)
		return -ENOMEM;

	if (logo_cache->logo.mem) {
		memcpy(logo, &logo_cache->logo, sizeof(*logo));
		return 0;
	}

	header = malloc(RK_BLK_SIZE);
	if (!header)
		return -ENOMEM;

	len = rockchip_read_resource_file(header, bmp_name, 0, RK_BLK_SIZE);
	if (len != RK_BLK_SIZE) {
		ret = -EINVAL;
		goto free_header;
	}

	logo->bpp = get_unaligned_le16(&header->bit_count);
	logo->width = get_unaligned_le32(&header->width);
	logo->height = get_unaligned_le32(&header->height);
	size = get_unaligned_le32(&header->file_size);
	if (!can_direct_logo(logo->bpp)) {
		if (size > MEMORY_POOL_SIZE) {
			printf("failed to use boot buf as temp bmp buffer\n");
			ret = -ENOMEM;
			goto free_header;
		}
		pdst = get_display_buffer(size);

	} else {
		pdst = get_display_buffer(size);
		dst = pdst;
	}

	len = rockchip_read_resource_file(pdst, bmp_name, 0, size);
	if (len != size) {
		printf("failed to load bmp %s\n", bmp_name);
		ret = -ENOENT;
		goto free_header;
	}

	if (!can_direct_logo(logo->bpp)) {
		int dst_size;
		/*
		 * TODO: force use 16bpp if bpp less than 16;
		 */
		logo->bpp = (logo->bpp <= 16) ? 16 : logo->bpp;
		dst_size = logo->width * logo->height * logo->bpp >> 3;

		dst = get_display_buffer(dst_size);
		if (!dst) {
			ret = -ENOMEM;
			goto free_header;
		}
		if (bmpdecoder(pdst, dst, logo->bpp)) {
			printf("failed to decode bmp %s\n", bmp_name);
			ret = -EINVAL;
			goto free_header;
		}
		flush_dcache_range((ulong)dst,
				   ALIGN((ulong)dst + dst_size,
					 CONFIG_SYS_CACHELINE_SIZE));

		logo->offset = 0;
		logo->ymirror = 0;
	} else {
		logo->offset = get_unaligned_le32(&header->data_offset);
		logo->ymirror = 1;
	}
	logo->mem = dst;

	memcpy(&logo_cache->logo, logo, sizeof(*logo));

free_header:

	free(header);

	return ret;
#else
	return -EINVAL;
#endif
}

void rockchip_show_fbbase(ulong fbbase)
{
	struct display_state *s;

	list_for_each_entry(s, &rockchip_display_list, head) {
		s->logo.mode = ROCKCHIP_DISPLAY_FULLSCREEN;
		s->logo.mem = (char *)fbbase;
		s->logo.width = DRM_ROCKCHIP_FB_WIDTH;
		s->logo.height = DRM_ROCKCHIP_FB_HEIGHT;
		s->logo.bpp = 32;
		s->logo.ymirror = 0;

		display_logo(s);
	}
}

void rockchip_show_bmp(const char *bmp)
{
	struct display_state *s;

	if (!bmp) {
		list_for_each_entry(s, &rockchip_display_list, head)
			display_disable(s);
		return;
	}

	list_for_each_entry(s, &rockchip_display_list, head) {
		s->logo.mode = s->charge_logo_mode;
		if (load_bmp_logo(&s->logo, bmp))
			continue;
		display_logo(s);
	}
}

void rockchip_show_logo(void)
{
	struct display_state *s;

	list_for_each_entry(s, &rockchip_display_list, head) {
		s->logo.mode = s->logo_mode;
		if (load_bmp_logo(&s->logo, s->ulogo_name))
			printf("failed to display uboot logo\n");
		else
			display_logo(s);

		/* Load kernel bmp in rockchip_display_fixup() later */
	}
}

static int rockchip_display_probe(struct udevice *dev)
{
	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
	const void *blob = gd->fdt_blob;
	int phandle;
	struct udevice *crtc_dev, *conn_dev;
	const struct rockchip_crtc *crtc;
	const struct rockchip_connector *conn;
	struct display_state *s;
	const char *name;
	int ret;
	ofnode node, route_node;
	struct device_node *port_node, *vop_node, *ep_node;
	struct device_node *cnt_node, *p;

	/* Before relocation we don't need to do anything */
	if (!(gd->flags & GD_FLG_RELOC))
		return 0;
	init_display_buffer(plat->base);

	route_node = dev_read_subnode(dev, "route");
	if (!ofnode_valid(route_node))
		return -ENODEV;

	ofnode_for_each_subnode(node, route_node) {
		if (!ofnode_is_available(node))
			continue;
		phandle = ofnode_read_u32_default(node, "connect", -1);
		if (phandle < 0) {
			printf("Warn: can't find connect node's handle\n");
			continue;
		}
		ep_node = of_find_node_by_phandle(phandle);
		if (!ofnode_valid(np_to_ofnode(ep_node))) {
			printf("Warn: can't find endpoint node from phandle\n");
			continue;
		}
		port_node = of_get_parent(ep_node);
		if (!ofnode_valid(np_to_ofnode(port_node))) {
			printf("Warn: can't find port node from phandle\n");
			continue;
		}
		vop_node = of_get_parent(port_node);
		if (!ofnode_valid(np_to_ofnode(vop_node))) {
			printf("Warn: can't find crtc node from phandle\n");
			continue;
		}
		ret = uclass_get_device_by_ofnode(UCLASS_VIDEO_CRTC,
						  np_to_ofnode(vop_node),
						  &crtc_dev);
		if (ret) {
			printf("Warn: can't find crtc driver %d\n", ret);
			continue;
		}
		crtc = (const struct rockchip_crtc *)dev_get_driver_data(crtc_dev);

		phandle = ofnode_read_u32_default(np_to_ofnode(ep_node),
						  "remote-endpoint", -1);
		cnt_node = of_find_node_by_phandle(phandle);
		if (phandle < 0) {
			printf("Warn: can't find remote-endpoint's handle\n");
			continue;
		}
		while (cnt_node->parent){
			p = of_get_parent(cnt_node);
			if (!strcmp(p->full_name, "/"))
				break;
			cnt_node = p;
		}
		if (!of_device_is_available(cnt_node))
			continue;
		ret = uclass_get_device_by_ofnode(UCLASS_DISPLAY,
						  np_to_ofnode(cnt_node),
						  &conn_dev);
		if (ret) {
			printf("Warn: can't find connect driver\n");
			continue;
		}
		conn = (const struct rockchip_connector *)dev_get_driver_data(conn_dev);

		s = malloc(sizeof(*s));
		if (!s)
			continue;

		memset(s, 0, sizeof(*s));

		INIT_LIST_HEAD(&s->head);
		ret = ofnode_read_string_index(node, "logo,uboot", 0, &s->ulogo_name);
		ret = ofnode_read_string_index(node, "logo,kernel", 0, &s->klogo_name);
		ret = ofnode_read_string_index(node, "logo,mode", 0, &name);
		if (!strcmp(name, "fullscreen"))
			s->logo_mode = ROCKCHIP_DISPLAY_FULLSCREEN;
		else
			s->logo_mode = ROCKCHIP_DISPLAY_CENTER;
		ret = ofnode_read_string_index(node, "charge_logo,mode", 0, &name);
		if (!strcmp(name, "fullscreen"))
			s->charge_logo_mode = ROCKCHIP_DISPLAY_FULLSCREEN;
		else
			s->charge_logo_mode = ROCKCHIP_DISPLAY_CENTER;

		s->blob = blob;
		s->conn_state.node = np_to_ofnode(cnt_node);
		s->conn_state.dev = conn_dev;
		s->conn_state.connector = conn;
		s->conn_state.overscan.left_margin = 100;
		s->conn_state.overscan.right_margin = 100;
		s->conn_state.overscan.top_margin = 100;
		s->conn_state.overscan.bottom_margin = 100;
		s->crtc_state.node = np_to_ofnode(vop_node);
		s->crtc_state.dev = crtc_dev;
		s->crtc_state.crtc = crtc;
		s->crtc_state.crtc_id = get_crtc_id(np_to_ofnode(ep_node));
		s->node = node;
		get_crtc_mcu_mode(&s->crtc_state);

		if (connector_panel_init(s)) {
			printf("Warn: Failed to init panel drivers\n");
			free(s);
			continue;
		}

		if (connector_phy_init(s)) {
			printf("Warn: Failed to init phy drivers\n");
			free(s);
			continue;
		}
		list_add_tail(&s->head, &rockchip_display_list);

	}

	if (list_empty(&rockchip_display_list)) {
		printf("Failed to found available display route\n");
		return -ENODEV;
	}

	uc_priv->xsize = DRM_ROCKCHIP_FB_WIDTH;
	uc_priv->ysize = DRM_ROCKCHIP_FB_HEIGHT;
	uc_priv->bpix = VIDEO_BPP32;

	#ifdef CONFIG_DRM_ROCKCHIP_VIDEO_FRAMEBUFFER
	rockchip_show_fbbase(plat->base);
	video_set_flush_dcache(dev, true);
	#endif

	return 0;
}

void rockchip_display_fixup(void *blob)
{
	const struct rockchip_connector_funcs *conn_funcs;
	const struct rockchip_crtc_funcs *crtc_funcs;
	const struct rockchip_connector *conn;
	const struct rockchip_crtc *crtc;
	struct display_state *s;
	int offset;
	const struct device_node *np;
	const char *path;

	if (!get_display_size())
		return;

	if (fdt_node_offset_by_compatible(blob, 0, "rockchip,drm-logo") >= 0) {
		list_for_each_entry(s, &rockchip_display_list, head)
			load_bmp_logo(&s->logo, s->klogo_name);
		offset = fdt_update_reserved_memory(blob, "rockchip,drm-logo",
						    (u64)memory_start,
						    (u64)get_display_size());
		if (offset < 0)
			printf("failed to reserve drm-loader-logo memory\n");
	} else {
		printf("can't found rockchip,drm-logo, use rockchip,fb-logo\n");
		/* Compatible with rkfb display, only need reserve memory */
		offset = fdt_update_reserved_memory(blob, "rockchip,fb-logo",
						    (u64)memory_start,
						    MEMORY_POOL_SIZE);
		if (offset < 0)
			printf("failed to reserve fb-loader-logo memory\n");
		else
			list_for_each_entry(s, &rockchip_display_list, head)
				load_kernel_bmp_logo(&s->logo, s->klogo_name);
		return;
	}

	list_for_each_entry(s, &rockchip_display_list, head) {
		conn = s->conn_state.connector;
		if (!conn)
			continue;
		conn_funcs = conn->funcs;
		if (!conn_funcs) {
			printf("failed to get exist connector\n");
			continue;
		}

		crtc = s->crtc_state.crtc;
		if (!crtc)
			continue;

		crtc_funcs = crtc->funcs;
		if (!crtc_funcs) {
			printf("failed to get exist crtc\n");
			continue;
		}

		if (crtc_funcs->fixup_dts)
			crtc_funcs->fixup_dts(s, blob);

		if (conn_funcs->fixup_dts)
			conn_funcs->fixup_dts(s, blob);

		np = ofnode_to_np(s->node);
		path = np->full_name;
		fdt_increase_size(blob, 0x400);
#define FDT_SET_U32(name, val) \
		do_fixup_by_path_u32(blob, path, name, val, 1);

		offset = s->logo.offset + (u32)(unsigned long)s->logo.mem
			 - memory_start;
		FDT_SET_U32("logo,offset", offset);
		FDT_SET_U32("logo,width", s->logo.width);
		FDT_SET_U32("logo,height", s->logo.height);
		FDT_SET_U32("logo,bpp", s->logo.bpp);
		FDT_SET_U32("logo,ymirror", s->logo.ymirror);
		FDT_SET_U32("video,hdisplay", s->conn_state.mode.hdisplay);
		FDT_SET_U32("video,vdisplay", s->conn_state.mode.vdisplay);
		FDT_SET_U32("video,crtc_hsync_end", s->conn_state.mode.crtc_hsync_end);
		FDT_SET_U32("video,crtc_vsync_end", s->conn_state.mode.crtc_vsync_end);
		FDT_SET_U32("video,vrefresh",
			    drm_mode_vrefresh(&s->conn_state.mode));
		FDT_SET_U32("video,flags", s->conn_state.mode.flags);
		FDT_SET_U32("overscan,left_margin", s->conn_state.overscan.left_margin);
		FDT_SET_U32("overscan,right_margin", s->conn_state.overscan.right_margin);
		FDT_SET_U32("overscan,top_margin", s->conn_state.overscan.top_margin);
		FDT_SET_U32("overscan,bottom_margin", s->conn_state.overscan.bottom_margin);
#undef FDT_SET_U32
	}
}

int rockchip_display_bind(struct udevice *dev)
{
	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);

	plat->size = DRM_ROCKCHIP_FB_SIZE + MEMORY_POOL_SIZE;

	return 0;
}

static const struct udevice_id rockchip_display_ids[] = {
	{ .compatible = "rockchip,display-subsystem" },
	{ }
};

U_BOOT_DRIVER(rockchip_display) = {
	.name	= "rockchip_display",
	.id	= UCLASS_VIDEO,
	.of_match = rockchip_display_ids,
	.bind	= rockchip_display_bind,
	.probe	= rockchip_display_probe,
};

static int do_rockchip_logo_show(cmd_tbl_t *cmdtp, int flag, int argc,
			char *const argv[])
{
	if (argc != 1)
		return CMD_RET_USAGE;

	rockchip_show_logo();

	return 0;
}

static int do_rockchip_show_bmp(cmd_tbl_t *cmdtp, int flag, int argc,
				char *const argv[])
{
	if (argc != 2)
		return CMD_RET_USAGE;

	rockchip_show_bmp(argv[1]);

	return 0;
}

U_BOOT_CMD(
	rockchip_show_logo, 1, 1, do_rockchip_logo_show,
	"load and display log from resource partition",
	NULL
);

U_BOOT_CMD(
	rockchip_show_bmp, 2, 1, do_rockchip_show_bmp,
	"load and display bmp from resource partition",
	"    <bmp_name>"
);