If the GOP has programmed periodic command mode,
we need to disable that which would need a
deconfigure and configure sequence.
Signed-off-by: Vandita Kulkarni <vandita.kulka...@intel.com>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c
b/drivers/gpu/drm/i915/display/icl_dsi.c
index 96f912b153e9..5bbaac5980ca 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1306,6 +1306,21 @@ static void gen11_dsi_get_timings(struct intel_encoder
*encoder,
adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
}
+bool gen11_dsi_is_periodic_cmd_mode(struct drm_i915_private *dev_priv,
+ struct intel_dsi *intel_dsi)
+{
+ u32 val;
+ enum transcoder dsi_trans;
+
+ if (intel_dsi->ports == BIT(PORT_B))
+ dsi_trans = TRANSCODER_DSI_1;
+ else
+ dsi_trans = TRANSCODER_DSI_0;
+
+ val = I915_READ(DSI_TRANS_FUNC_CONF(dsi_trans));
+ return (val & DSI_PERIODIC_FRAME_UPDATE_ENABLE);
+}
+
static void gen11_dsi_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
@@ -1324,6 +1339,10 @@ static void gen11_dsi_get_config(struct intel_encoder
*encoder,
gen11_dsi_get_timings(encoder, pipe_config);
pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
pipe_config->pipe_bpp = bdw_get_pipemisc_bpp(crtc);
+
+ if (gen11_dsi_is_periodic_cmd_mode(dev_priv, intel_dsi))
+ pipe_config->hw.adjusted_mode.private_flags |=
+ I915_MODE_FLAG_DSI_PERIODIC_CMD_MODE;
}
static int gen11_dsi_compute_config(struct intel_encoder *encoder,
@@ -1354,6 +1373,9 @@ static int gen11_dsi_compute_config(struct intel_encoder
*encoder,
pipe_config->clock_set = true;
pipe_config->port_clock = intel_dsi_bitrate(intel_dsi) / 5;
+ /* We would not opereate in peridoc command mode */
+ pipe_config->hw.adjusted_mode.private_flags &=
+ ~I915_MODE_FLAG_DSI_PERIODIC_CMD_MODE;
return 0;
}
--
2.21.0.5.gaeb582a
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