Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/i915/dsi: Fill BLLPs with blanking packets if requested
TGL/ADL DSI can be configured to fill all BLLPs with blanking
packets. Currently we enable that always, but the VBT actually
tells us whether this is desired or not. Hook that up.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260326111814.9800-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
+9
-5
+5
-4
drivers/gpu/drm/i915/display/icl_dsi.c
+5
-4
drivers/gpu/drm/i915/display/icl_dsi.c
···
765
765
}
766
766
}
767
767
768
-
if (DISPLAY_VER(display) >= 12) {
769
-
if (is_vid_mode(intel_dsi))
770
-
tmp |= BLANKING_PACKET_ENABLE;
771
-
}
768
+
if (DISPLAY_VER(display) >= 12 &&
769
+
is_vid_mode(intel_dsi) && intel_dsi->blanking_pkt)
770
+
tmp |= BLANKING_PACKET_ENABLE;
771
+
else
772
+
tmp &= ~BLANKING_PACKET_ENABLE;
772
773
773
774
/* program DSI operation mode */
774
775
if (is_vid_mode(intel_dsi)) {
+1
-1
drivers/gpu/drm/i915/display/icl_dsi_regs.h
+1
-1
drivers/gpu/drm/i915/display/icl_dsi_regs.h
···
232
232
#define CALIBRATION_DISABLED (0x0 << 4)
233
233
#define CALIBRATION_ENABLED_INITIAL_ONLY (0x2 << 4)
234
234
#define CALIBRATION_ENABLED_INITIAL_PERIODIC (0x3 << 4)
235
-
#define BLANKING_PACKET_ENABLE (1 << 2)
235
+
#define BLANKING_PACKET_ENABLE (1 << 2) /* tgl+ */
236
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#define S3D_ORIENTATION_LANDSCAPE (1 << 1)
237
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#define EOTP_DISABLED (1 << 0)
238
238
+1
drivers/gpu/drm/i915/display/intel_dsi.h
+1
drivers/gpu/drm/i915/display/intel_dsi.h
+2
drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+2
drivers/gpu/drm/i915/display/intel_dsi_vbt.c
···
718
718
"burst" : "<unknown>");
719
719
drm_printf(&p, "Burst mode ratio %d\n", intel_dsi->burst_mode_ratio);
720
720
drm_printf(&p, "Reset timer %d\n", intel_dsi->rst_timer_val);
721
+
drm_printf(&p, "Blanking packets during BLLP %s\n", str_enabled_disabled(intel_dsi->blanking_pkt));
721
722
drm_printf(&p, "EoT packet %s\n", str_enabled_disabled(intel_dsi->eot_pkt));
722
723
drm_printf(&p, "Clock stop during BLLP %s\n", str_enabled_disabled(intel_dsi->clock_stop));
723
724
drm_printf(&p, "Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
···
771
770
772
771
drm_dbg_kms(display->drm, "\n");
773
772
773
+
intel_dsi->blanking_pkt = mipi_config->blanking_packets_during_bllp;
774
774
intel_dsi->eot_pkt = !mipi_config->eot_pkt_disabled;
775
775
intel_dsi->clock_stop = mipi_config->enable_clk_stop;
776
776
intel_dsi->lane_count = mipi_config->lane_cnt + 1;