From: David Francis <david.fran...@amd.com>
As part of hardware certification, read-write access to
the link rate, lane count, voltage swing, pre-emphasis,
and PHY test pattern of DP connectors is required. This commit
adds debugfs files that will correspond to these values.
The file operations are not yet implemented: currently
writing or reading them does nothing.
Change-Id: Ide5499df3f9c3d0d01741e0acd8700cd973a36b0
Signed-off-by: David Francis <david.fran...@amd.com>
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/Makefile | 2 +-
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 ++
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 170 ++++++++++++++++++
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.h | 34 ++++
4 files changed, 215 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
index af16973f2c41..589c60ec59bd 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile
@@ -32,7 +32,7 @@ AMDGPUDM += amdgpu_dm_services.o amdgpu_dm_helpers.o
endif
ifneq ($(CONFIG_DEBUG_FS),)
-AMDGPUDM += amdgpu_dm_crc.o
+AMDGPUDM += amdgpu_dm_crc.o amdgpu_dm_debugfs.o
endif
subdir-ccflags-y += -I$(FULL_AMD_DISPLAY_PATH)/dc
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 90d7b9225b90..d2f89e267ad6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -39,6 +39,9 @@
#include "dm_helpers.h"
#include "dm_services_types.h"
#include "amdgpu_dm_mst_types.h"
+#if defined(CONFIG_DEBUG_FS)
+#include "amdgpu_dm_debugfs.h"
+#endif
#include "ivsrcid/ivsrcid_vislands30.h"
@@ -3686,6 +3689,13 @@ static int amdgpu_dm_connector_init(struct
amdgpu_display_manager *dm,
&aconnector->base, &aencoder->base);
drm_connector_register(&aconnector->base);
+#if defined(CONFIG_DEBUG_FS)
+ res = connector_debugfs_init(aconnector);
+ if (res) {
+ DRM_ERROR("Failed to create debugfs for connector");
+ goto out_free;
+ }
+#endif
if (connector_type == DRM_MODE_CONNECTOR_DisplayPort
|| connector_type == DRM_MODE_CONNECTOR_eDP)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
new file mode 100644
index 000000000000..cf5ea69e46ad
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include <linux/debugfs.h>
+
+#include "dc.h"
+#include "dc_link.h"
+
+#include "amdgpu.h"
+#include "amdgpu_dm.h"
+#include "amdgpu_dm_debugfs.h"
+
+static ssize_t dp_link_rate_debugfs_read(struct file *f, char __user *buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to read link rate */
+ return 1;
+}
+
+static ssize_t dp_link_rate_debugfs_write(struct file *f, const char __user
*buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to write link rate */
+ return 1;
+}
+
+static ssize_t dp_lane_count_debugfs_read(struct file *f, char __user *buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to read lane count */
+ return 1;
+}
+
+static ssize_t dp_lane_count_debugfs_write(struct file *f, const char __user
*buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to write lane count */
+ return 1;
+}
+
+static ssize_t dp_voltage_swing_debugfs_read(struct file *f, char __user *buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to read voltage swing */
+ return 1;
+}
+
+static ssize_t dp_voltage_swing_debugfs_write(struct file *f, const char
__user *buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to write voltage swing */
+ return 1;
+}
+
+static ssize_t dp_pre_emphasis_debugfs_read(struct file *f, char __user *buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to read pre-emphasis */
+ return 1;
+}
+
+static ssize_t dp_pre_emphasis_debugfs_write(struct file *f, const char __user
*buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to write pre-emphasis */
+ return 1;
+}
+
+static ssize_t dp_phy_test_pattern_debugfs_read(struct file *f, char __user
*buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to read PHY test pattern */
+ return 1;
+}
+
+static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char
__user *buf,
+ size_t size, loff_t *pos)
+{
+ /* TODO: create method to write PHY test pattern */
+ return 1;
+}
+
+static const struct file_operations dp_link_rate_fops = {
+ .owner = THIS_MODULE,
+ .read = dp_link_rate_debugfs_read,
+ .write = dp_link_rate_debugfs_write,
+ .llseek = default_llseek
+};
+
+static const struct file_operations dp_lane_count_fops = {
+ .owner = THIS_MODULE,
+ .read = dp_lane_count_debugfs_read,
+ .write = dp_lane_count_debugfs_write,
+ .llseek = default_llseek
+};
+
+static const struct file_operations dp_voltage_swing_fops = {
+ .owner = THIS_MODULE,
+ .read = dp_voltage_swing_debugfs_read,
+ .write = dp_voltage_swing_debugfs_write,
+ .llseek = default_llseek
+};
+
+static const struct file_operations dp_pre_emphasis_fops = {
+ .owner = THIS_MODULE,
+ .read = dp_pre_emphasis_debugfs_read,
+ .write = dp_pre_emphasis_debugfs_write,
+ .llseek = default_llseek
+};
+
+static const struct file_operations dp_phy_test_pattern_fops = {
+ .owner = THIS_MODULE,
+ .read = dp_phy_test_pattern_debugfs_read,
+ .write = dp_phy_test_pattern_debugfs_write,
+ .llseek = default_llseek
+};
+
+static const struct {
+ char *name;
+ const struct file_operations *fops;
+} dp_debugfs_entries[] = {
+ {"link_rate", &dp_link_rate_fops},
+ {"lane_count", &dp_lane_count_fops},
+ {"voltage_swing", &dp_voltage_swing_fops},
+ {"pre_emphasis", &dp_pre_emphasis_fops},
+ {"phy_test_pattern", &dp_phy_test_pattern_fops}
+};
+
+int connector_debugfs_init(struct amdgpu_dm_connector *connector)
+{
+ int i;
+ struct dentry *ent, *dir = connector->base.debugfs_entry;
+
+ if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+ for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) {
+ ent = debugfs_create_file(dp_debugfs_entries[i].name,
+ 0644,
+ dir,
+ connector,
+ dp_debugfs_entries[i].fops);
+ if (IS_ERR(ent))
+ return PTR_ERR(ent);
+ }
+ }
+
+ return 0;
+}
+
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h
new file mode 100644
index 000000000000..d9ed1b2aa811
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __AMDGPU_DM_DEBUGFS_H__
+#define __AMDGPU_DM_DEBUGFS_H__
+
+#include "amdgpu.h"
+#include "amdgpu_dm.h"
+
+int connector_debugfs_init(struct amdgpu_dm_connector *connector);
+
+#endif
--
2.17.1
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