From: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx> For validation purposes, it might be useful to be able to force Bigjoiner mode, even if current dotclock/resolution do not require that. Lets add such to option to debugfs. v2: - Apparently intel_dp_need_bigjoiner can't be used, when debugfs entry is created so lets just check manually the DISPLAY_VER. v3: - Switch to intel_connector from drm_connector(Jani Nikula) - Remove redundant modeset lock(Jani Nikula) - Use kstrtobool_from_user for boolean value(Jani Nikula) v4: - Apply the changes to proper function(Jani Nikula) v5: - Removed unnecessary check from i915_bigjoiner_enable_show (Ville Syrjälä) - Added eDP connector check to intel_connector_debugfs_add (Ville Syrjälä) - Removed debug message in order to prevent dmesg flooding (Ville Syrjälä) v6: - Assume now always that m->private is intel_connector - Fixed other similar conflicts v7: - Move bigjoiner force option to intel_connector(Ville Syrjälä) - Use DEFINE_SHOW_STORE_ATTRIBUTE instead of defining fops manually.(Ville Syrjälä) v8: - Pass intel_connector to debugfs_create_file, instead of drm_connector. (Jani Nikula) Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx> --- .../drm/i915/display/intel_display_debugfs.c | 47 +++++++++++++++++++ .../drm/i915/display/intel_display_types.h | 2 + drivers/gpu/drm/i915/display/intel_dp.c | 4 +- 3 files changed, 52 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index 6f2d13c8ccf7..a962b48bcf13 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1391,6 +1391,20 @@ out: drm_modeset_unlock(&i915->drm.mode_config.connection_mutex); return ret; } +static int i915_bigjoiner_enable_show(struct seq_file *m, void *data) +{ + struct intel_connector *connector = m->private; + struct drm_crtc *crtc; + + crtc = connector->base.state->crtc; + if (connector->base.status != connector_status_connected || !crtc) + return -ENODEV; + + seq_printf(m, "Bigjoiner enable: %d\n", connector->force_bigjoiner_enable); + + return 0; +} + static ssize_t i915_dsc_output_format_write(struct file *file, const char __user *ubuf, size_t len, loff_t *offp) @@ -1412,6 +1426,30 @@ static ssize_t i915_dsc_output_format_write(struct file *file, return len; } +static ssize_t i915_bigjoiner_enable_write(struct file *file, + const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct seq_file *m = file->private_data; + struct intel_connector *connector = m->private; + struct drm_crtc *crtc; + bool bigjoiner_en = 0; + int ret; + + crtc = connector->base.state->crtc; + if (connector->base.status != connector_status_connected || !crtc) + return -ENODEV; + + ret = kstrtobool_from_user(ubuf, len, &bigjoiner_en); + if (ret < 0) + return ret; + + connector->force_bigjoiner_enable = bigjoiner_en; + *offp += len; + + return len; +} + static int i915_dsc_output_format_open(struct inode *inode, struct file *file) { @@ -1505,6 +1543,8 @@ static const struct file_operations i915_dsc_fractional_bpp_fops = { .write = i915_dsc_fractional_bpp_write }; +DEFINE_SHOW_STORE_ATTRIBUTE(i915_bigjoiner_enable); + /* * Returns the Current CRTC's bpc. * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc @@ -1586,6 +1626,13 @@ void intel_connector_debugfs_add(struct intel_connector *connector) connector, &i915_dsc_fractional_bpp_fops); } + if (DISPLAY_VER(i915) >= 11 && + (connector_type == DRM_MODE_CONNECTOR_DisplayPort || + connector_type == DRM_MODE_CONNECTOR_eDP)) { + debugfs_create_file("i915_bigjoiner_force_enable", 0644, root, + connector, &i915_bigjoiner_enable_fops); + } + if (connector_type == DRM_MODE_CONNECTOR_DSI || connector_type == DRM_MODE_CONNECTOR_eDP || connector_type == DRM_MODE_CONNECTOR_DisplayPort || diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 01eb6e4e6049..0d4012097db1 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -626,6 +626,8 @@ struct intel_connector { struct intel_dp *mst_port; + bool force_bigjoiner_enable; + struct { struct drm_dp_aux *dsc_decompression_aux; u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 5045c34a16be..217196196e50 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -1205,11 +1205,13 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp, int hdisplay, int clock) { struct drm_i915_private *i915 = dp_to_i915(intel_dp); + struct intel_connector *connector = intel_dp->attached_connector; if (!intel_dp_can_bigjoiner(intel_dp)) return false; - return clock > i915->max_dotclk_freq || hdisplay > 5120; + return clock > i915->max_dotclk_freq || hdisplay > 5120 || + connector->force_bigjoiner_enable; } static enum drm_mode_status -- 2.42.0