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path: root/drivers/gpu/drm/msm/dp/dp_debug.c
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Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_debug.c')
-rw-r--r--drivers/gpu/drm/msm/dp/dp_debug.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
new file mode 100644
index 000000000000..84670bcdcfea
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_debug.c
@@ -0,0 +1,485 @@
+// 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_check_buffer_overflow(int rc, int *max_size, int *len)
+{
+ if (rc >= *max_size) {
+ DRM_ERROR("buffer overflow\n");
+ return -EINVAL;
+ }
+ *len += rc;
+ *max_size = SZ_4K - *len;
+
+ return 0;
+}
+
+static ssize_t dp_debug_read_info(struct file *file, char __user *user_buff,
+ size_t count, loff_t *ppos)
+{
+ struct dp_debug_private *debug = file->private_data;
+ char *buf;
+ u32 len = 0, rc = 0;
+ u64 lclk = 0;
+ u32 max_size = SZ_4K;
+ u32 link_params_rate;
+ struct drm_display_mode *drm_mode;
+
+ if (!debug)
+ return -ENODEV;
+
+ if (*ppos)
+ return 0;
+
+ buf = kzalloc(SZ_4K, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ drm_mode = &debug->panel->dp_mode.drm_mode;
+
+ rc = snprintf(buf + len, max_size, "\tname = %s\n", DEBUG_NAME);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\tdp_panel\n\t\tmax_pclk_khz = %d\n",
+ debug->panel->max_pclk_khz);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\tdrm_dp_link\n\t\trate = %u\n",
+ debug->panel->link_info.rate);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tnum_lanes = %u\n",
+ debug->panel->link_info.num_lanes);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tcapabilities = %lu\n",
+ debug->panel->link_info.capabilities);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\tdp_panel_info:\n\t\tactive = %dx%d\n",
+ drm_mode->hdisplay,
+ drm_mode->vdisplay);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tback_porch = %dx%d\n",
+ drm_mode->htotal - drm_mode->hsync_end,
+ drm_mode->vtotal - drm_mode->vsync_end);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tfront_porch = %dx%d\n",
+ drm_mode->hsync_start - drm_mode->hdisplay,
+ drm_mode->vsync_start - drm_mode->vdisplay);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tsync_width = %dx%d\n",
+ drm_mode->hsync_end - drm_mode->hsync_start,
+ drm_mode->vsync_end - drm_mode->vsync_start);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tactive_low = %dx%d\n",
+ debug->panel->dp_mode.h_active_low,
+ debug->panel->dp_mode.v_active_low);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\th_skew = %d\n",
+ drm_mode->hskew);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\trefresh rate = %d\n",
+ drm_mode_vrefresh(drm_mode));
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tpixel clock khz = %d\n",
+ drm_mode->clock);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tbpp = %d\n",
+ debug->panel->dp_mode.bpp);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ /* Link Information */
+ rc = snprintf(buf + len, max_size,
+ "\tdp_link:\n\t\ttest_requested = %d\n",
+ debug->link->sink_request);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tnum_lanes = %d\n",
+ debug->link->link_params.num_lanes);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ link_params_rate = debug->link->link_params.rate;
+ rc = snprintf(buf + len, max_size,
+ "\t\tbw_code = %d\n",
+ drm_dp_link_rate_to_bw_code(link_params_rate));
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ lclk = debug->link->link_params.rate * 1000;
+ rc = snprintf(buf + len, max_size,
+ "\t\tlclk = %lld\n", lclk);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tv_level = %d\n",
+ debug->link->phy_params.v_level);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ rc = snprintf(buf + len, max_size,
+ "\t\tp_level = %d\n",
+ debug->link->phy_params.p_level);
+ if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
+ goto error;
+
+ if (copy_to_user(user_buff, buf, len))
+ goto error;
+
+ *ppos += len;
+
+ kfree(buf);
+ return len;
+ error:
+ kfree(buf);
+ return -EINVAL;
+}
+
+static int dp_test_data_show(struct seq_file *m, void *data)
+{
+ struct drm_device *dev;
+ struct dp_debug_private *debug;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+ u32 bpc;
+
+ debug = m->private;
+ dev = debug->drm_dev;
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+
+ if (connector->connector_type !=
+ DRM_MODE_CONNECTOR_DisplayPort)
+ continue;
+
+ 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");
+ }
+
+ drm_connector_list_iter_end(&conn_iter);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(dp_test_data);
+
+static int dp_test_type_show(struct seq_file *m, void *data)
+{
+ struct dp_debug_private *debug = m->private;
+ struct drm_device *dev = debug->drm_dev;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+
+ if (connector->connector_type !=
+ DRM_MODE_CONNECTOR_DisplayPort)
+ continue;
+
+ if (connector->status == connector_status_connected)
+ seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
+ else
+ seq_puts(m, "0");
+ }
+ drm_connector_list_iter_end(&conn_iter);
+
+ 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;
+ struct dp_debug_private *debug;
+ struct drm_device *dev;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+ int val = 0;
+
+ debug = ((struct seq_file *)file->private_data)->private;
+ dev = debug->drm_dev;
+
+ 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);
+
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ if (connector->connector_type !=
+ DRM_MODE_CONNECTOR_DisplayPort)
+ continue;
+
+ if (connector->status == connector_status_connected) {
+ status = kstrtoint(input_buffer, 10, &val);
+ if (status < 0)
+ break;
+ 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;
+ }
+ }
+ drm_connector_list_iter_end(&conn_iter);
+ kfree(input_buffer);
+ if (status < 0)
+ return status;
+
+ *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_device *dev = debug->drm_dev;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ if (connector->connector_type !=
+ DRM_MODE_CONNECTOR_DisplayPort)
+ continue;
+
+ 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");
+ }
+ drm_connector_list_iter_end(&conn_iter);
+
+ 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 dp_debug_fops = {
+ .open = simple_open,
+ .read = dp_debug_read_info,
+};
+
+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 int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
+{
+ int rc = 0;
+ struct dp_debug_private *debug = container_of(dp_debug,
+ struct dp_debug_private, dp_debug);
+ struct dentry *file;
+ struct dentry *test_active;
+ struct dentry *test_data, *test_type;
+
+ file = debugfs_create_file("dp_debug", 0444, minor->debugfs_root,
+ debug, &dp_debug_fops);
+ if (IS_ERR_OR_NULL(file)) {
+ rc = PTR_ERR(file);
+ DRM_ERROR("[%s] debugfs create file failed, rc=%d\n",
+ DEBUG_NAME, rc);
+ }
+
+ test_active = debugfs_create_file("msm_dp_test_active", 0444,
+ minor->debugfs_root,
+ debug, &test_active_fops);
+ if (IS_ERR_OR_NULL(test_active)) {
+ rc = PTR_ERR(test_active);
+ DRM_ERROR("[%s] debugfs test_active failed, rc=%d\n",
+ DEBUG_NAME, rc);
+ }
+
+ test_data = debugfs_create_file("msm_dp_test_data", 0444,
+ minor->debugfs_root,
+ debug, &dp_test_data_fops);
+ if (IS_ERR_OR_NULL(test_data)) {
+ rc = PTR_ERR(test_data);
+ DRM_ERROR("[%s] debugfs test_data failed, rc=%d\n",
+ DEBUG_NAME, rc);
+ }
+
+ test_type = debugfs_create_file("msm_dp_test_type", 0444,
+ minor->debugfs_root,
+ debug, &dp_test_type_fops);
+ if (IS_ERR_OR_NULL(test_type)) {
+ rc = PTR_ERR(test_type);
+ DRM_ERROR("[%s] debugfs test_type failed, rc=%d\n",
+ DEBUG_NAME, rc);
+ }
+
+ debug->root = minor->debugfs_root;
+
+ return rc;
+}
+
+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)
+{
+ int rc = 0;
+ struct dp_debug_private *debug;
+ struct dp_debug *dp_debug;
+
+ 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;
+
+ rc = dp_debug_init(dp_debug, minor);
+ if (rc) {
+ devm_kfree(dev, debug);
+ goto error;
+ }
+
+ 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);
+}