diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2056-drm-amd-display-Add-connector-debugfs-for-output_bpc.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2056-drm-amd-display-Add-connector-debugfs-for-output_bpc.patch | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2056-drm-amd-display-Add-connector-debugfs-for-output_bpc.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2056-drm-amd-display-Add-connector-debugfs-for-output_bpc.patch new file mode 100644 index 00000000..1584f462 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2056-drm-amd-display-Add-connector-debugfs-for-output_bpc.patch @@ -0,0 +1,137 @@ +From 6eda942846a688fad1518c1782fb439b965c70b7 Mon Sep 17 00:00:00 2001 +From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> +Date: Mon, 3 Jun 2019 13:44:37 -0400 +Subject: [PATCH 2056/2940] drm/amd/display: Add connector debugfs for + "output_bpc" + +[Why] +This will be useful for verifying whether we enter the correct output +color depth from IGT. + +[How] +Locks the connector and associated CRTC if available and outputs +the current and maximum output bpc values. + +Example: + +cat /sys/kernel/debug/dri/0/DP-1/output_bpc +Current: 8 +Maximum: 10 + +v2: Drop unneeded connector status check + +Change-Id: I198e19a7838e0d90c2a2d551de029784d73020d3 +Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> +Reviewed-by: David Francis <David.Francis@amd.com> +Signed-off-by: Chaudhary Amit Kumar <Chaudharyamit.Kumar@amd.com> +--- + .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 72 ++++++++++++++++++- + 1 file changed, 70 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 1d5fc5ad3bee..e6a2b87703f5 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 +@@ -672,6 +672,72 @@ static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __us + return bytes_from_user; + } + ++/* ++ * Returns the current and maximum output bpc for the connector. ++ * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc ++ */ ++static int output_bpc_show(struct seq_file *m, void *data) ++{ ++ struct drm_connector *connector = m->private; ++ struct drm_device *dev = connector->dev; ++ struct drm_crtc *crtc = NULL; ++ struct dm_crtc_state *dm_crtc_state = NULL; ++ int res = -ENODEV; ++ unsigned int bpc; ++ ++ mutex_lock(&dev->mode_config.mutex); ++ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); ++ ++ if (connector->state == NULL) ++ goto unlock; ++ ++ crtc = connector->state->crtc; ++ if (crtc == NULL) ++ goto unlock; ++ ++ drm_modeset_lock(&crtc->mutex, NULL); ++ if (crtc->state == NULL) ++ goto unlock; ++ ++ dm_crtc_state = to_dm_crtc_state(crtc->state); ++ if (dm_crtc_state->stream == NULL) ++ goto unlock; ++ ++ switch (dm_crtc_state->stream->timing.display_color_depth) { ++ case COLOR_DEPTH_666: ++ bpc = 6; ++ break; ++ case COLOR_DEPTH_888: ++ bpc = 8; ++ break; ++ case COLOR_DEPTH_101010: ++ bpc = 10; ++ break; ++ case COLOR_DEPTH_121212: ++ bpc = 12; ++ break; ++ case COLOR_DEPTH_161616: ++ bpc = 16; ++ break; ++ default: ++ goto unlock; ++ } ++ ++ seq_printf(m, "Current: %u\n", bpc); ++ seq_printf(m, "Maximum: %u\n", connector->display_info.bpc); ++ res = 0; ++ ++unlock: ++ if (crtc) ++ drm_modeset_unlock(&crtc->mutex); ++ ++ drm_modeset_unlock(&dev->mode_config.connection_mutex); ++ mutex_unlock(&dev->mode_config.mutex); ++ ++ return res; ++} ++ ++ + /* + * Returns the min and max vrr vfreq through the connector's debugfs file. + * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range +@@ -730,8 +796,6 @@ static ssize_t dp_sdp_message_debugfs_write(struct file *f, const char __user *b + 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) + { +@@ -814,6 +878,9 @@ static ssize_t dp_dpcd_data_read(struct file *f, char __user *buf, + return read_size - r; + } + ++DEFINE_SHOW_ATTRIBUTE(output_bpc); ++DEFINE_SHOW_ATTRIBUTE(vrr_range); ++ + static const struct file_operations dp_link_settings_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_link_settings_read, +@@ -866,6 +933,7 @@ static const struct { + {"link_settings", &dp_link_settings_debugfs_fops}, + {"phy_settings", &dp_phy_settings_debugfs_fop}, + {"test_pattern", &dp_phy_test_pattern_fops}, ++ {"output_bpc", &output_bpc_fops}, + {"vrr_range", &vrr_range_fops}, + {"sdp_message", &sdp_message_fops}, + {"aux_dpcd_address", &dp_dpcd_address_debugfs_fops}, +-- +2.17.1 + |