#endif /* __INTEL_CRTC_STATE_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 9e2fb8626c96..27b7d8dafe66 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -12,6 +12,7 @@
#include "i915_irq.h"
#include "i915_reg.h"
#include "intel_de.h"
+#include "intel_crtc_state_dump.h"
#include "intel_display_debugfs.h"
#include "intel_display_power.h"
#include "intel_display_power_well.h"
@@ -1770,6 +1771,13 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
str_yes_no(crtc_state->dsc.compression_enable));
seq_printf(m, "DSC_Sink_Support: %s\n",
str_yes_no(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
+ seq_printf(m, "DSC_Output_Format_Sink_Support: RGB: %s YCBCR420: %s YCBCR444: %s\n",
+ str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd,
+ DP_DSC_RGB)),
+ str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd,
+ DP_DSC_YCbCr420_Native)),
+ str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd,
+ DP_DSC_YCbCr444)));
seq_printf(m, "Force_DSC_Enable: %s\n",
str_yes_no(intel_dp->force_dsc_en));
if (!intel_dp_is_edp(intel_dp))
@@ -1895,6 +1903,72 @@ static const struct file_operations i915_dsc_bpc_fops = {
.write = i915_dsc_bpc_write
};
+static int i915_dsc_output_format_show(struct seq_file *m, void *data)
+{
+ struct drm_connector *connector = m->private;
+ struct drm_device *dev = connector->dev;
+ struct drm_crtc *crtc;
+ struct intel_crtc_state *crtc_state;
+ struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+ int ret;
+
+ if (!encoder)
+ return -ENODEV;
+
+ ret = drm_modeset_lock_single_interruptible(&dev->mode_config.connection_mutex);
+ if (ret)
+ return ret;
+
+ crtc = connector->state->crtc;
+ if (connector->status != connector_status_connected || !crtc) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ crtc_state = to_intel_crtc_state(crtc->state);
+ seq_printf(m, "DSC_Output_Format: %s\n", output_formats(crtc_state->output_format));
+
+out: drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+ return ret;
+}
+
+static ssize_t i915_dsc_output_format_write(struct file *file,
+ const char __user *ubuf,
+ size_t len, loff_t *offp)
+{
+ struct drm_connector *connector =
+ ((struct seq_file *)file->private_data)->private;
+ struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+ struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+ int dsc_output_format = 0;
+ int ret;
+
+ ret = kstrtoint_from_user(ubuf, len, 0, &dsc_output_format);
+ if (ret < 0)
+ return ret;
+
+ intel_dp->force_dsc_output_format = dsc_output_format;
+ *offp += len;
+
+ return len;
+}
+
+static int i915_dsc_output_format_open(struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, i915_dsc_output_format_show, inode->i_private);
+}
+
+static const struct file_operations i915_dsc_output_format_fops = {
+ .owner = THIS_MODULE,
+ .open = i915_dsc_output_format_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = i915_dsc_output_format_write
+};
+
/*
* Returns the Current CRTC's bpc.
* Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc
@@ -1966,6 +2040,9 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
debugfs_create_file("i915_dsc_bpc", 0644, root,
connector, &i915_dsc_bpc_fops);
+
+ debugfs_create_file("i915_dsc_output_format", 0644, root,
+ connector, &i915_dsc_output_format_fops);
}
if (connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 9ccae7a46020..9f7951b49c42 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1743,6 +1743,7 @@ struct intel_dp {
/* Display stream compression testing */
bool force_dsc_en;
+ int force_dsc_output_format;
int force_dsc_bpc;
bool hobl_failed;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 250d9cdd14b8..bd2d3d11e85b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -76,6 +76,7 @@
#include "intel_tc.h"
#include "intel_vdsc.h"
#include "intel_vrr.h"
+#include "intel_crtc_state_dump.h"
/* DP DSC throughput values used for slice count calculations KPixels/s */
#define DP_DSC_PEAK_PIXEL_RATE 2720000
@@ -2063,6 +2064,16 @@ intel_dp_compute_output_format(struct intel_encoder *encoder,
bool ycbcr_420_only;
int ret;
+ if (intel_dp->force_dsc_output_format) {
+ crtc_state->output_format = intel_dp->force_dsc_output_format;
+ drm_dbg_kms(&i915->drm, "DSC output format forced to %s",
+ output_formats(crtc_state->output_format));
+
+ ret = intel_dp_compute_link_config(encoder, crtc_state, conn_state,
+ respect_downstream_limits);
