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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt)"[drm-dp] %s: " fmt, __func__
#include <linux/debugfs.h>
#include <drm/drm_connector.h>
#include <drm/drm_file.h>
#include "dp_parser.h"
#include "dp_catalog.h"
#include "dp_aux.h"
#include "dp_ctrl.h"
#include "dp_debug.h"
#include "dp_display.h"
#define DEBUG_NAME "msm_dp"
struct dp_debug_private {
struct dentry *root;
struct dp_usbpd *usbpd;
struct dp_link *link;
struct dp_panel *panel;
struct drm_connector *connector;
struct device *dev;
struct drm_device *drm_dev;
struct dp_debug dp_debug;
};
static int dp_debug_show(struct seq_file *seq, void *p)
{
struct dp_debug_private *debug = seq->private;
u64 lclk = 0;
u32 link_params_rate;
const struct drm_display_mode *drm_mode;
if (!debug)
return -ENODEV;
drm_mode = &debug->panel->dp_mode.drm_mode;
seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
debug->panel->link_info.rate);
seq_printf(seq, "\t\tnum_lanes = %u\n",
debug->panel->link_info.num_lanes);
seq_printf(seq, "\t\tcapabilities = %lu\n",
debug->panel->link_info.capabilities);
seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
drm_mode->hdisplay,
drm_mode->vdisplay);
seq_printf(seq, "\t\tback_porch = %dx%d\n",
drm_mode->htotal - drm_mode->hsync_end,
drm_mode->vtotal - drm_mode->vsync_end);
seq_printf(seq, "\t\tfront_porch = %dx%d\n",
drm_mode->hsync_start - drm_mode->hdisplay,
drm_mode->vsync_start - drm_mode->vdisplay);
seq_printf(seq, "\t\tsync_width = %dx%d\n",
drm_mode->hsync_end - drm_mode->hsync_start,
drm_mode->vsync_end - drm_mode->vsync_start);
seq_printf(seq, "\t\tactive_low = %dx%d\n",
debug->panel->dp_mode.h_active_low,
debug->panel->dp_mode.v_active_low);
seq_printf(seq, "\t\th_skew = %d\n",
drm_mode->hskew);
seq_printf(seq, "\t\trefresh rate = %d\n",
drm_mode_vrefresh(drm_mode));
seq_printf(seq, "\t\tpixel clock khz = %d\n",
drm_mode->clock);
seq_printf(seq, "\t\tbpp = %d\n",
debug->panel->dp_mode.bpp);
/* Link Information */
seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
debug->link->sink_request);
seq_printf(seq, "\t\tnum_lanes = %d\n",
debug->link->link_params.num_lanes);
link_params_rate = debug->link->link_params.rate;
seq_printf(seq, "\t\tbw_code = %d\n",
drm_dp_link_rate_to_bw_code(link_params_rate));
lclk = debug->link->link_params.rate * 1000;
seq_printf(seq, "\t\tlclk = %lld\n", lclk);
seq_printf(seq, "\t\tv_level = %d\n",
debug->link->phy_params.v_level);
seq_printf(seq, "\t\tp_level = %d\n",
debug->link->phy_params.p_level);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(dp_debug);
static int dp_test_data_show(struct seq_file *m, void *data)
{
const struct dp_debug_private *debug = m->private;
const struct drm_connector *connector = debug->connector;
u32 bpc;
if (connector->status == connector_status_connected) {
bpc = debug->link->test_video.test_bit_depth;
seq_printf(m, "hdisplay: %d\n",
debug->link->test_video.test_h_width);
seq_printf(m, "vdisplay: %d\n",
debug->link->test_video.test_v_height);
seq_printf(m, "bpc: %u\n",
dp_link_bit_depth_to_bpc(bpc));
} else {
seq_puts(m, "0");
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(dp_test_data);
static int dp_test_type_show(struct seq_file *m, void *data)
{
const struct dp_debug_private *debug = m->private;
const struct drm_connector *connector = debug->connector;
if (connector->status == connector_status_connected)
seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
else
seq_puts(m, "0");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(dp_test_type);
static ssize_t dp_test_active_write(struct file *file,
const char __user *ubuf,
size_t len, loff_t *offp)
{
char *input_buffer;
int status = 0;
const struct dp_debug_private *debug;
const struct drm_connector *connector;
int val = 0;
debug = ((struct seq_file *)file->private_data)->private;
connector = debug->connector;
if (len == 0)
return 0;
input_buffer = memdup_user_nul(ubuf, len);
if (IS_ERR(input_buffer))
return PTR_ERR(input_buffer);
DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
if (connector->status == connector_status_connected) {
status = kstrtoint(input_buffer, 10, &val);
if (status < 0) {
kfree(input_buffer);
return status;
}
DRM_DEBUG_DRIVER("Got %d for test active\n", val);
/* To prevent erroneous activation of the compliance
* testing code, only accept an actual value of 1 here
*/
if (val == 1)
debug->panel->video_test = true;
else
debug->panel->video_test = false;
}
kfree(input_buffer);
*offp += len;
return len;
}
static int dp_test_active_show(struct seq_file *m, void *data)
{
struct dp_debug_private *debug = m->private;
struct drm_connector *connector = debug->connector;
if (connector->status == connector_status_connected) {
if (debug->panel->video_test)
seq_puts(m, "1");
else
seq_puts(m, "0");
} else {
seq_puts(m, "0");
}
return 0;
}
static int dp_test_active_open(struct inode *inode,
struct file *file)
{
return single_open(file, dp_test_active_show,
inode->i_private);
}
static const struct file_operations test_active_fops = {
.owner = THIS_MODULE,
.open = dp_test_active_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = dp_test_active_write
};
static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
{
char path[64];
struct dp_debug_private *debug = container_of(dp_debug,
struct dp_debug_private, dp_debug);
snprintf(path, sizeof(path), "msm_dp-%s", debug->connector->name);
debug->root = debugfs_create_dir(path, minor->debugfs_root);
debugfs_create_file("dp_debug", 0444, debug->root,
debug, &dp_debug_fops);
debugfs_create_file("msm_dp_test_active", 0444,
debug->root,
debug, &test_active_fops);
debugfs_create_file("msm_dp_test_data", 0444,
debug->root,
debug, &dp_test_data_fops);
debugfs_create_file("msm_dp_test_type", 0444,
debug->root,
debug, &dp_test_type_fops);
}
struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector *connector, struct drm_minor *minor)
{
struct dp_debug_private *debug;
struct dp_debug *dp_debug;
int rc;
if (!dev || !panel || !usbpd || !link) {
DRM_ERROR("invalid input\n");
rc = -EINVAL;
goto error;
}
debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
if (!debug) {
rc = -ENOMEM;
goto error;
}
debug->dp_debug.debug_en = false;
debug->usbpd = usbpd;
debug->link = link;
debug->panel = panel;
debug->dev = dev;
debug->drm_dev = minor->dev;
debug->connector = connector;
dp_debug = &debug->dp_debug;
dp_debug->vdisplay = 0;
dp_debug->hdisplay = 0;
dp_debug->vrefresh = 0;
dp_debug_init(dp_debug, minor);
return dp_debug;
error:
return ERR_PTR(rc);
}
static int dp_debug_deinit(struct dp_debug *dp_debug)
{
struct dp_debug_private *debug;
if (!dp_debug)
return -EINVAL;
debug = container_of(dp_debug, struct dp_debug_private, dp_debug);
debugfs_remove_recursive(debug->root);
return 0;
}
void dp_debug_put(struct dp_debug *dp_debug)
{
struct dp_debug_private *debug;
if (!dp_debug)
return;
debug = container_of(dp_debug, struct dp_debug_private, dp_debug);
dp_debug_deinit(dp_debug);
devm_kfree(debug->dev, debug);
}
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