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Message-ID: <20250210144959.100551-7-shiyongbang@huawei.com>
Date: Mon, 10 Feb 2025 22:49:58 +0800
From: Yongbang Shi <shiyongbang@...wei.com>
To: <xinliang.liu@...aro.org>, <tiantao6@...ilicon.com>,
<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
<tzimmermann@...e.de>, <airlied@...il.com>, <daniel@...ll.ch>,
<kong.kongxinwei@...ilicon.com>
CC: <liangjian010@...wei.com>, <chenjianmin@...wei.com>,
<lidongming5@...wei.com>, <shiyongbang@...wei.com>, <libaihan@...wei.com>,
<shenjian15@...wei.com>, <shaojijie@...wei.com>,
<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 drm-dp 6/7] drm/hisilicon/hibmc: Add drm debugfs functions
From: Baihan Li <libaihan@...wei.com>
We use the previous two patches as our debug functions and
generate two files. "hibmc-dp" and "color-bar".
hibmc-dp: read only, print the dp link status and dpcd version
color-bar: read/write
write: cfg color bar and enable/disable it by your input
read: print your current cfg info of color-bar
Signed-off-by: Baihan Li <libaihan@...wei.com>
Signed-off-by: Yongbang Shi <shiyongbang@...wei.com>
---
ChangeLog:
v1 -> v2:
- deleting edid decoder and its debugfs, suggested by Dmitry Baryshkov.
- using debugfs_init() callback, suggested by Dmitry Baryshkov.
---
drivers/gpu/drm/hisilicon/hibmc/Makefile | 3 +-
.../drm/hisilicon/hibmc/hibmc_drm_debugfs.c | 124 ++++++++++++++++++
.../gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c | 1 +
.../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 2 +
4 files changed, 129 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c
diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
index 43de077d6769..1f65c683282f 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
+++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_i2c.o \
- dp/dp_aux.o dp/dp_link.o dp/dp_hw.o dp/dp_serdes.o hibmc_drm_dp.o
+ dp/dp_aux.o dp/dp_link.o dp/dp_hw.o dp/dp_serdes.o hibmc_drm_dp.o \
+ hibmc_drm_debugfs.o
obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c
new file mode 100644
index 000000000000..af2efb70d6ea
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/seq_file.h>
+#include <linux/pci.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_edid.h>
+
+#include "hibmc_drm_drv.h"
+
+static int hibmc_dp_show(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = m->private;
+ struct drm_device *dev = node->minor->dev;
+ struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+ int idx;
+
+ if (!drm_dev_enter(dev, &idx))
+ return -ENODEV;
+
+ seq_printf(m, "enable lanes: %u\n", hibmc_dp_get_lanes(&priv->dp));
+ seq_printf(m, "link rate: %d\n", hibmc_dp_get_link_rate(&priv->dp) * 27);
+ seq_printf(m, "dpcd version: 0x%x\n", hibmc_dp_get_dpcd(&priv->dp));
+
+ drm_dev_exit(idx);
+
+ return 0;
+}
+
+static ssize_t hibmc_control_write(struct file *file, const char __user *user_buf,
+ size_t size, loff_t *ppos)
+{
+ struct hibmc_drm_private *priv = file_inode(file)->i_private;
+ struct hibmc_dp_cbar_cfg *cfg = &priv->dp.cfg;
+ u32 input = 0;
+ int ret, idx;
+ u8 val;
+
+ ret = kstrtou32_from_user(user_buf, size, 0, &input);
+ if (ret)
+ return ret;
+
+ val = FIELD_GET(GENMASK(13, 10), input);
+ if (val > 9)
+ return -EINVAL;
+ cfg->pattern = val;
+ cfg->enable = FIELD_GET(BIT(0), input);
+ cfg->self_timing = FIELD_GET(BIT(1), input);
+ cfg->dynamic_rate = FIELD_GET(GENMASK(9, 2), input);
+
+ ret = drm_dev_enter(&priv->dev, &idx);
+ if (!ret)
+ return -ENODEV;
+
+ hibmc_dp_set_cbar(&priv->dp, cfg);
+
+ drm_dev_exit(idx);
+
+ return size;
+}
+
+static int hibmc_dp_dbgfs_show(struct seq_file *m, void *arg)
+{
+ struct hibmc_drm_private *priv = m->private;
+ struct hibmc_dp_cbar_cfg *cfg = &priv->dp.cfg;
+ u32 output = 0;
+ int idx;
+
+ if (!drm_dev_enter(&priv->dev, &idx))
+ return -ENODEV;
+
+ /* bit[0]: 0: enable colorbar, 1: disable colorbar
+ * bit[1]: 0: timing follows XDP, 1: internal self timing
+ * bit[2,9]: 0: static colorbar image,
+ * 1~255: right shifting a type of color per (1~255)frames
+ * bit[10,13]: 0~9: color bar, white, red, orange,
+ * yellow, green, cyan, bule, pupper, black
+ */
+ output = cfg->enable | (cfg->self_timing << 1) |
+ (cfg->dynamic_rate << 2) | (cfg->pattern << 10);
+
+ drm_dev_exit(idx);
+
+ seq_printf(m, "hibmc dp colorbar cfg: %u\n", output);
+
+ return 0;
+}
+
+static int hibmc_open(struct inode *inode, struct file *filp)
+{
+ return single_open(filp, hibmc_dp_dbgfs_show, inode->i_private);
+}
+
+static const struct file_operations hibmc_dbg_fops = {
+ .owner = THIS_MODULE,
+ .write = hibmc_control_write,
+ .read = seq_read,
+ .open = hibmc_open,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct drm_info_list hibmc_debugfs_list[] = {
+ { "hibmc-dp", hibmc_dp_show },
+};
+
+void hibmc_debugfs_init(struct drm_connector *connector, struct dentry *root)
+{
+ struct drm_device *dev = connector->dev;
+ struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
+ struct drm_minor *minor = dev->primary;
+
+ /* create the file in drm directory, so we don't need to remove manually */
+ debugfs_create_file("colorbar-cfg", 0200,
+ root, priv, &hibmc_dbg_fops);
+
+ drm_debugfs_create_files(hibmc_debugfs_list, ARRAY_SIZE(hibmc_debugfs_list),
+ root, minor);
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
index 795c5b1a6b99..1f8f7b74f5b4 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
@@ -40,6 +40,7 @@ static const struct drm_connector_funcs hibmc_dp_conn_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.late_register = hibmc_dp_late_register,
.early_unregister = hibmc_dp_early_unregister,
+ .debugfs_init = hibmc_debugfs_init,
};
static inline int hibmc_dp_prepare(struct hibmc_dp *dp, struct drm_display_mode *mode)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
index 3ddd71aada66..bc89e4b9f4e3 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
@@ -69,4 +69,6 @@ int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_vdac *connector);
int hibmc_dp_init(struct hibmc_drm_private *priv);
+void hibmc_debugfs_init(struct drm_connector *connector, struct dentry *root);
+
#endif
--
2.33.0
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