diff options
| -rw-r--r-- | cmd/bmp.c | 8 | ||||
| -rw-r--r-- | common/stdio.c | 5 | ||||
| -rw-r--r-- | drivers/video/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/video/Makefile | 1 | ||||
| -rw-r--r-- | drivers/video/video_link.c | 532 | ||||
| -rw-r--r-- | include/video_link.h | 19 |
6 files changed, 572 insertions, 0 deletions
@@ -19,6 +19,7 @@ #include <mapmem.h> #include <splash.h> #include <video.h> +#include <video_link.h> #include <asm/byteorder.h> static int bmp_info (ulong addr); @@ -252,8 +253,15 @@ int bmp_display(ulong addr, int x, int y) addr = map_to_sysmem(bmp); #ifdef CONFIG_DM_VIDEO +#ifdef CONFIG_VIDEO_LINK + dev = video_link_get_video_device(); + if (!dev) { + ret = -ENODEV; + } else { +#else ret = uclass_first_device_err(UCLASS_VIDEO, &dev); if (!ret) { +#endif bool align = false; if (CONFIG_IS_ENABLED(SPLASH_SCREEN_ALIGN) || diff --git a/common/stdio.c b/common/stdio.c index 54ecc9b53d..661d643748 100644 --- a/common/stdio.c +++ b/common/stdio.c @@ -17,6 +17,7 @@ #include <stdio_dev.h> #include <serial.h> #include <splash.h> +#include <video_link.h> #if defined(CONFIG_SYS_I2C) #include <i2c.h> @@ -345,6 +346,10 @@ int stdio_add_devices(void) #else #endif #ifdef CONFIG_DM_VIDEO + +#ifdef CONFIG_VIDEO_LINK + video_link_init(); +#endif /* * If the console setting is not in environment variables then * console_init_r() will not be calling iomux_doenv() (which calls diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 20ccd61ef6..706248128f 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -787,6 +787,13 @@ config IHS_VIDEO_OUT out On-screen Display (OSD) used on gdsys FPGAs to control dynamic textual overlays of the display outputs. +config VIDEO_LINK + bool "Enable video link framework support" + depends on DM_VIDEO + help + This option enables a video link framework basing on port-endpoint graph + to connect video components. + config VIDEO_IMX8_HDMI bool "i.MX8 HDMI Splash screen" default n diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 05c994bbb7..2039ab0c0a 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_VIDEO_MIPI_DSI) += dsi-host-uclass.o obj-$(CONFIG_DM_VIDEO) += panel-uclass.o simple_panel.o obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o obj-$(CONFIG_DM_VIDEO) += video_bmp.o +obj-$(CONFIG_VIDEO_LINK) += video_link.o endif obj-${CONFIG_EXYNOS_FB} += exynos/ diff --git a/drivers/video/video_link.c b/drivers/video/video_link.c new file mode 100644 index 0000000000..65f6b602e9 --- /dev/null +++ b/drivers/video/video_link.c @@ -0,0 +1,532 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2020 NXP + * + */ + +#include <common.h> +#include <linux/errno.h> + +#include <dm.h> +#include <dm/uclass-internal.h> +#include <dm/device-internal.h> +#include <dm/ofnode.h> +#include <dm/read.h> +#include <video.h> +#include <panel.h> + +struct of_endpoint { + unsigned int port; + unsigned int id; + ofnode local_node; +}; + +#define MAX_LINKS 3 +#define MAX_LINK_DEVICES 5 + +struct video_link { + struct udevice *link_devs[MAX_LINK_DEVICES]; + int dev_num; +}; + +struct video_link video_links[MAX_LINKS]; +struct video_link temp_stack; +ulong video_links_num = 0; +ulong curr_video_link = 0; +bool video_off = false; + +ofnode ofnode_get_child_by_name(ofnode parent, const char *name) +{ + ofnode child; + const char *child_name; + + for (child = ofnode_first_subnode(parent); + ofnode_valid(child); + child = ofnode_next_subnode(child)) { + + child_name = ofnode_get_name(child); + + if (!strncmp(child_name, name, strlen(name))) { + break; + } + + } + return child; +} + +ofnode ofnode_graph_get_next_endpoint(ofnode parent, + ofnode prev) +{ + ofnode endpoint; + ofnode port; + const char *name; + + + if (!ofnode_valid(prev)) { + ofnode node; + + node = ofnode_find_subnode(parent, "ports"); + if (ofnode_valid(node)) + parent = node; + + port = ofnode_get_child_by_name(parent, "port"); + if (!ofnode_valid(port)) { + debug("no port node found in 0x%lx\n", parent.of_offset); + return ofnode_null(); + } + + endpoint = ofnode_first_subnode(port); + if (ofnode_valid(endpoint)) { + debug("get next endpoint %s\n", ofnode_get_name(endpoint)); + return endpoint; + } + } else { + port = ofnode_get_parent(prev); + endpoint = ofnode_next_subnode(prev); + if (ofnode_valid(endpoint)) { + debug("get next endpoint %s\n", ofnode_get_name(endpoint)); + return endpoint; + } + } + + debug("port %s\n", ofnode_get_name(port)); + + while (1) { + do { + port = ofnode_next_subnode(port); + if (!ofnode_valid(port)) + return ofnode_null(); + + name = ofnode_get_name(port); + } while (strncmp(name, "port", 4)); + + /* + * Now that we have a port node, get the next endpoint by + * getting the next child. If the previous endpoint is NULL this + * will return the first child. + */ + endpoint = ofnode_first_subnode(port); + if (ofnode_valid(endpoint)) { + debug("get next endpoint %s\n", ofnode_get_name(endpoint)); + return endpoint; + } + } + + return ofnode_null(); +} + +#define for_each_endpoint_of_node(parent, child) \ + for (child = ofnode_graph_get_next_endpoint(parent, ofnode_null()); ofnode_valid(child); \ + child = ofnode_graph_get_next_endpoint(parent, child)) + + +int ofnode_graph_get_endpoint_count(ofnode node) +{ + ofnode endpoint; + int num = 0; + + for_each_endpoint_of_node(node, endpoint) + num++; + + return num; +} + +int ofnode_graph_parse_endpoint(ofnode node, + struct of_endpoint *endpoint) +{ + ofnode port_node = ofnode_get_parent(node); + + memset(endpoint, 0, sizeof(*endpoint)); + + endpoint->local_node = node; + /* + * It doesn't matter whether the two calls below succeed. + * If they don't then the default value 0 is used. + */ + ofnode_read_u32(port_node, "reg", &endpoint->port); + ofnode_read_u32(node, "reg", &endpoint->id); + + return 0; +} + +ofnode ofnode_graph_get_endpoint_by_regs( + const ofnode parent, int port_reg, int reg) +{ + struct of_endpoint endpoint; + ofnode node; + + for_each_endpoint_of_node(parent, node) { + ofnode_graph_parse_endpoint(node, &endpoint); + if (((port_reg == -1) || (endpoint.port == port_reg)) && + ((reg == -1) || (endpoint.id == reg))) { + debug("get node %s\n", ofnode_get_name(node)); + + return node; + } + } + + return ofnode_null(); +} + +ofnode ofnode_graph_get_remote_endpoint(ofnode node) +{ + ofnode remote; + u32 phandle; + int ret; + + ret = ofnode_read_u32(node, "remote-endpoint", &phandle); + if (ret) { + printf("required remote-endpoint property isn't provided\n"); + return ofnode_null(); + } + + remote = ofnode_get_by_phandle(phandle); + if (!ofnode_valid(remote)) { + printf("failed to find remote-endpoint\n"); + return ofnode_null(); + } + + return remote; +} + +ofnode ofnode_graph_get_port_parent(ofnode node) +{ + unsigned int depth; + + if (!ofnode_valid(node)) + return ofnode_null(); + + /* + * Preserve usecount for passed in node as of_get_next_parent() + * will do of_node_put() on it. + */ + + /* Walk 3 levels up only if there is 'ports' node. */ + for (depth = 3; depth && ofnode_valid(node); depth--) { + node = ofnode_get_parent(node); + const char *name = ofnode_get_name(node); + if (depth == 2 && strcmp(name, "ports")) + break; + } + return node; +} + +ofnode ofnode_graph_get_remote_port_parent(ofnode node) +{ + ofnode np, pp; + + /* Get remote endpoint node. */ + np = ofnode_graph_get_remote_endpoint(node); + + pp = ofnode_graph_get_port_parent(np); + + return pp; +} + +int find_device_by_ofnode(ofnode node, struct udevice **pdev) +{ + int ret; + + if (!ofnode_is_available(node)) + return -2; + + ret = uclass_find_device_by_ofnode(UCLASS_DISPLAY, node, pdev); + if (!ret) + return 0; + + ret = uclass_find_device_by_ofnode(UCLASS_DSI_HOST, node, pdev); + if (!ret) + return 0; + + ret = uclass_find_device_by_ofnode(UCLASS_VIDEO_BRIDGE, node, pdev); + if (!ret) + return 0; + + ret = uclass_find_device_by_ofnode(UCLASS_PANEL, node, pdev); + if (!ret) + return 0; + + return -1; +} + +static void video_link_stack_push(struct udevice *dev) +{ + if (temp_stack.dev_num < MAX_LINK_DEVICES) { + temp_stack.link_devs[temp_stack.dev_num] = dev; + temp_stack.dev_num++; + } +} + +static void video_link_stack_pop(void) +{ + if (temp_stack.dev_num > 0) { + temp_stack.link_devs[temp_stack.dev_num] = NULL; + temp_stack.dev_num--; + } +} + +static int duplicate_video_link(void) +{ + if (video_links_num < MAX_LINKS) { + video_links[video_links_num] = temp_stack; + video_links_num++; + + debug("duplicate links num %lu, temp_stack num %d\n", + video_links_num, temp_stack.dev_num); + return 0; + } + + return -ENODEV; +} + +static void video_link_add_node(struct udevice *peer_dev, struct udevice *dev, ofnode dev_node) +{ + int ret = 0; + ofnode remote, endpoint_node; + struct udevice *remote_dev; + bool find = false; + + debug("endpoint cnt %d\n", ofnode_graph_get_endpoint_count(dev_node)); + + video_link_stack_push(dev); + + for_each_endpoint_of_node(dev_node, endpoint_node) { + remote = ofnode_graph_get_remote_port_parent(endpoint_node); + if (!ofnode_valid(remote)) + continue; + + debug("remote %s\n", ofnode_get_name(remote)); + ret = find_device_by_ofnode(remote, &remote_dev); + if (!ret) { + debug("remote dev %s\n", remote_dev->name); + + if (peer_dev && peer_dev == remote_dev) + continue; + + /* it is possible that ofnode of remote_dev is not equal to remote */ + video_link_add_node(dev, remote_dev, remote); + + find = true; + } + } + + /* leaf node or no valid new endpoint, now copy the entire stack to a new video link */ + if (!find) { + ret = duplicate_video_link(); + if (ret) + printf("video link is full\n"); + } + + video_link_stack_pop(); +} + +struct udevice *video_link_get_next_device(struct udevice *curr_dev) +{ + int i, ret; + + if (video_off) + return NULL; + + if (curr_video_link >= video_links_num) { + printf("current video link is not correct\n"); + return NULL; + } + + for (i = 0; i < video_links[curr_video_link].dev_num; i++) { + if (video_links[curr_video_link].link_devs[i] == curr_dev) { + if ((i + 1) < video_links[curr_video_link].dev_num) { + ret = device_probe(video_links[curr_video_link].link_devs[i + 1]); + if (ret) { + printf("probe device is failed, ret %d\n", ret); + return NULL; + } + + return video_links[curr_video_link].link_devs[i + 1]; + } else { + debug("fail to find next device, already last one\n"); + return NULL; + } + } + } + + return NULL; +} + +struct udevice *video_link_get_video_device(void) +{ + int ret; + if (video_off) + return NULL; + + if (curr_video_link >= video_links_num) + return NULL; + + if (video_links[curr_video_link].dev_num == 0) + return NULL; + + ret = device_probe(video_links[curr_video_link].link_devs[0]); + if (ret) { + printf("probe video device failed, ret %d\n", ret); + return NULL; + } + + return video_links[curr_video_link].link_devs[0]; +} + +int video_link_get_display_timings(struct display_timing *timings) +{ + int i = 0; + int ret; + struct udevice *dev; + + if (video_off) + return -EPERM; + + if (curr_video_link >= video_links_num) + return -ENODEV; + + if (video_links[curr_video_link].dev_num == 0) + return -ENODEV; + + for (i = video_links[curr_video_link].dev_num - 1; i >= 0 ; i--) { + dev = video_links[curr_video_link].link_devs[i]; + if (device_get_uclass_id(dev) == UCLASS_PANEL) { + ret = device_probe(video_links[curr_video_link].link_devs[i]); + if (ret) { + printf("fail to probe panel device %s\n", dev->name); + return ret; + } + + ret = panel_get_display_timing(dev, timings); + if (ret) { + ret = ofnode_decode_display_timing(dev_ofnode(dev), 0, timings); + if (ret) { + printf("fail to get panel timing %s\n", dev->name); + return ret; + } + } + + return 0; + } else if (device_get_uclass_id(dev) == UCLASS_DISPLAY || + device_get_uclass_id(dev) == UCLASS_VIDEO) { + + ret = ofnode_decode_display_timing(dev_ofnode(dev), 0, timings); + if (!ret) + return 0; + } + } + + return -EINVAL; +} + +static void list_videolink(bool current_only) +{ + ulong index = 0; + int j; + bool match; + + /* dump the link */ + debug("video link number: %lu\n", video_links_num); + + for (index = 0; index < video_links_num; index ++) { + match = false; + if (curr_video_link == index) + match = true; + else if (current_only) + continue; + + printf("[%c]-Video Link %lu", (match)? '*':' ', index); + + if (match) { + struct udevice *video_dev = video_link_get_video_device(); + if (video_dev) { + printf(" (%u x %u)", video_get_xsize(video_dev), + video_get_ysize(video_dev)); + } + } + + printf("\n"); + + for (j = 0; j < video_links[index].dev_num; j++) { + printf("\t[%d] %s, %s\n", j, video_links[index].link_devs[j]->name, + dev_get_uclass_name(video_links[index].link_devs[j])); + } + } +} + +static int do_videolink(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) +{ + char cmd = 'l'; + int ret = 0; + + if (argc > 1) + cmd = argv[1][0]; + + switch (cmd) { + case 'l': /* list */ + list_videolink(false); + break; + default: + ret = CMD_RET_USAGE; + break; + } + + return ret; +} + +int video_link_init(void) +{ + struct udevice *dev; + ulong env_id; + int off; + memset(&video_links, 0, sizeof(video_links)); + memset(&temp_stack, 0, sizeof(temp_stack)); + + for (uclass_find_first_device(UCLASS_VIDEO, &dev); + dev; + uclass_find_next_device(&dev)) { + + video_link_add_node(NULL, dev, dev_ofnode(dev)); + } + + if (video_links_num == 0) { + printf("Fail to setup video link\n"); + return -ENODEV; + } + + /* Read the env variable for default video link */ + off = env_get_yesno("video_off"); + if (off == 1) { + video_off = true; + return 0; + } + + env_id = env_get_ulong("video_link", 10, 0); + if (env_id < video_links_num) + curr_video_link = env_id; + + list_videolink(true); + + return 0; +} + +int video_link_shut_down(void) +{ + struct udevice *video_dev = video_link_get_video_device(); + + if (video_dev) + device_remove(video_dev, DM_REMOVE_NORMAL); + + return 0; +} + +#ifdef CONFIG_SYS_LONGHELP +static char video_link_help_text[] = + "list \n" + " - show video link info, set video_link variable to select link"; +#endif + +U_BOOT_CMD( + videolink, 5, 1, do_videolink, + "list and select video link", video_link_help_text +); diff --git a/include/video_link.h b/include/video_link.h new file mode 100644 index 0000000000..5350bfa9e9 --- /dev/null +++ b/include/video_link.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2020 NXP + */ + +#ifndef __VIDEO_LINK +#define __VIDEO_LINK + +int video_link_init(void); + +int video_link_shut_down(void); + +struct udevice *video_link_get_next_device(struct udevice *curr_dev); + +struct udevice *video_link_get_video_device(void); + +int video_link_get_display_timings(struct display_timing *timings); + +#endif |