diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 194 |
1 files changed, 192 insertions, 2 deletions
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 index 4a55cde027cf..1d5fc5ad3bee 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -29,6 +29,7 @@ #include "amdgpu.h" #include "amdgpu_dm.h" #include "amdgpu_dm_debugfs.h" +#include "dm_helpers.h" /* function description * get/ set DP configuration: lane_count, link_rate, spread_spectrum @@ -688,8 +689,131 @@ static int vrr_range_show(struct seq_file *m, void *data) return 0; } + +/* function description + * + * generic SDP message access for testing + * + * debugfs sdp_message is located at /syskernel/debug/dri/0/DP-x + * + * SDP header + * Hb0 : Secondary-Data Packet ID + * Hb1 : Secondary-Data Packet type + * Hb2 : Secondary-Data-packet-specific header, Byte 0 + * Hb3 : Secondary-Data-packet-specific header, Byte 1 + * + * for using custom sdp message: input 4 bytes SDP header and 32 bytes raw data + */ +static ssize_t dp_sdp_message_debugfs_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + int r; + uint8_t data[36]; + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dm_crtc_state *acrtc_state; + uint32_t write_size = 36; + + if (connector->base.status != connector_status_connected) + return -ENODEV; + + if (size == 0) + return 0; + + acrtc_state = to_dm_crtc_state(connector->base.state->crtc->state); + + r = copy_from_user(data, buf, write_size); + + write_size -= r; + + dc_stream_send_dp_sdp(acrtc_state->stream, data, write_size); + + return write_size; +} + DEFINE_SHOW_ATTRIBUTE(vrr_range); +static ssize_t dp_dpcd_address_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + int r; + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + + if (size < sizeof(connector->debugfs_dpcd_address)) + return 0; + + r = copy_from_user(&connector->debugfs_dpcd_address, + buf, sizeof(connector->debugfs_dpcd_address)); + + return size - r; +} + +static ssize_t dp_dpcd_size_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + int r; + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + + if (size < sizeof(connector->debugfs_dpcd_size)) + return 0; + + r = copy_from_user(&connector->debugfs_dpcd_size, + buf, sizeof(connector->debugfs_dpcd_size)); + + if (connector->debugfs_dpcd_size > 256) + connector->debugfs_dpcd_size = 0; + + return size - r; +} + +static ssize_t dp_dpcd_data_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + int r; + char *data; + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + uint32_t write_size = connector->debugfs_dpcd_size; + + if (size < write_size) + return 0; + + data = kzalloc(write_size, GFP_KERNEL); + if (!data) + return 0; + + r = copy_from_user(data, buf, write_size); + + dm_helpers_dp_write_dpcd(link->ctx, link, + connector->debugfs_dpcd_address, data, write_size - r); + kfree(data); + return write_size - r; +} + +static ssize_t dp_dpcd_data_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + int r; + char *data; + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + uint32_t read_size = connector->debugfs_dpcd_size; + + if (size < read_size) + return 0; + + data = kzalloc(read_size, GFP_KERNEL); + if (!data) + return 0; + + dm_helpers_dp_read_dpcd(link->ctx, link, + connector->debugfs_dpcd_address, data, read_size); + + r = copy_to_user(buf, data, read_size); + + kfree(data); + return read_size - r; +} + static const struct file_operations dp_link_settings_debugfs_fops = { .owner = THIS_MODULE, .read = dp_link_settings_read, @@ -710,6 +834,31 @@ static const struct file_operations dp_phy_test_pattern_fops = { .llseek = default_llseek }; +static const struct file_operations sdp_message_fops = { + .owner = THIS_MODULE, + .write = dp_sdp_message_debugfs_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dpcd_address_debugfs_fops = { + .owner = THIS_MODULE, + .write = dp_dpcd_address_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dpcd_size_debugfs_fops = { + .owner = THIS_MODULE, + .write = dp_dpcd_size_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dpcd_data_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dpcd_data_read, + .write = dp_dpcd_data_write, + .llseek = default_llseek +}; + static const struct { char *name; const struct file_operations *fops; @@ -717,7 +866,11 @@ static const struct { {"link_settings", &dp_link_settings_debugfs_fops}, {"phy_settings", &dp_phy_settings_debugfs_fop}, {"test_pattern", &dp_phy_test_pattern_fops}, - {"vrr_range", &vrr_range_fops} + {"vrr_range", &vrr_range_fops}, + {"sdp_message", &sdp_message_fops}, + {"aux_dpcd_address", &dp_dpcd_address_debugfs_fops}, + {"aux_dpcd_size", &dp_dpcd_size_debugfs_fops}, + {"aux_dpcd_data", &dp_dpcd_data_debugfs_fops} }; int connector_debugfs_init(struct amdgpu_dm_connector *connector) @@ -842,6 +995,35 @@ static const struct drm_info_list amdgpu_dm_debugfs_list[] = { {"amdgpu_target_backlight_pwm", &target_backlight_read}, }; +/* + * Sets the DC visual confirm debug option from the given string. + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm + */ +static int visual_confirm_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.dc->debug.visual_confirm = (enum visual_confirm)val; + + return 0; +} + +/* + * Reads the DC visual confirm debug option value into the given buffer. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_visual_confirm + */ +static int visual_confirm_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.visual_confirm; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get, + visual_confirm_set, "%llu\n"); + int dtn_debugfs_init(struct amdgpu_device *adev) { static const struct file_operations dtn_log_fops = { @@ -867,5 +1049,13 @@ int dtn_debugfs_init(struct amdgpu_device *adev) adev, &dtn_log_fops); - return PTR_ERR_OR_ZERO(ent); + if (IS_ERR(ent)) + return PTR_ERR(ent); + + ent = debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, + adev, &visual_confirm_fops); + if (IS_ERR(ent)) + return PTR_ERR(ent); + + return 0; } |