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drm/i915/dsi: Fill BLLPs with blanking packets if requested

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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>
This commit is contained in:
Ville Syrjälä 2026-03-26 13:18:13 +02:00
parent 81ec9556ad
commit 765a2635cd
4 changed files with 9 additions and 5 deletions
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9
drivers/gpu/drm/i915/display/icl_dsi.c
View File

@ -765,10 +765,11 @@ gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
}
}
if (DISPLAY_VER(display) >= 12) {
if (is_vid_mode(intel_dsi))
tmp |= BLANKING_PACKET_ENABLE;
}
if (DISPLAY_VER(display) >= 12 &&
is_vid_mode(intel_dsi) && intel_dsi->blanking_pkt)
tmp |= BLANKING_PACKET_ENABLE;
else
tmp &= ~BLANKING_PACKET_ENABLE;
/* program DSI operation mode */
if (is_vid_mode(intel_dsi)) {

2
drivers/gpu/drm/i915/display/icl_dsi_regs.h
View File

@ -232,7 +232,7 @@
#define CALIBRATION_DISABLED (0x0 << 4)
#define CALIBRATION_ENABLED_INITIAL_ONLY (0x2 << 4)
#define CALIBRATION_ENABLED_INITIAL_PERIODIC (0x3 << 4)
#define BLANKING_PACKET_ENABLE (1 << 2)
#define BLANKING_PACKET_ENABLE (1 << 2) /* tgl+ */
#define S3D_ORIENTATION_LANDSCAPE (1 << 1)
#define EOTP_DISABLED (1 << 0)

1
drivers/gpu/drm/i915/display/intel_dsi.h
View File

@ -80,6 +80,7 @@ struct intel_dsi {
/* NON_BURST_SYNC_PULSE, NON_BURST_SYNC_EVENTS, or BURST_MODE */
int video_mode;
bool blanking_pkt;
bool eot_pkt;
bool clock_stop;

2
drivers/gpu/drm/i915/display/intel_dsi_vbt.c
View File

@ -718,6 +718,7 @@ void intel_dsi_log_params(struct intel_dsi *intel_dsi)
"burst" : "<unknown>");
drm_printf(&p, "Burst mode ratio %d\n", intel_dsi->burst_mode_ratio);
drm_printf(&p, "Reset timer %d\n", intel_dsi->rst_timer_val);
drm_printf(&p, "Blanking packets during BLLP %s\n", str_enabled_disabled(intel_dsi->blanking_pkt));
drm_printf(&p, "EoT packet %s\n", str_enabled_disabled(intel_dsi->eot_pkt));
drm_printf(&p, "Clock stop during BLLP %s\n", str_enabled_disabled(intel_dsi->clock_stop));
drm_printf(&p, "Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
@ -770,6 +771,7 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
drm_dbg_kms(display->drm, "\n");
intel_dsi->blanking_pkt = mipi_config->blanking_packets_during_bllp;
intel_dsi->eot_pkt = !mipi_config->eot_pkt_disabled;
intel_dsi->clock_stop = mipi_config->enable_clk_stop;
intel_dsi->lane_count = mipi_config->lane_cnt + 1;