If the GOP has programmed periodic command mode,
we need to disable that which would need a
deconfigure and configure sequence.
v2: Fix sparse error, pass only intel_dsi (Jani)
v3: Use intel_de_read
Signed-off-by: Vandita Kulkarni <vandita.kulka...@intel.com>
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c
b/drivers/gpu/drm/i915/display/icl_dsi.c
index 17aa3fd780a8..949f4867402b 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1423,6 +1423,22 @@ static void gen11_dsi_get_timings(struct intel_encoder
*encoder,
adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
}
+static bool gen11_dsi_is_periodic_cmd_mode(struct intel_dsi *intel_dsi)
+{
+ struct drm_device *dev = intel_dsi->base.base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ enum transcoder dsi_trans;
+ u32 val;
+
+ if (intel_dsi->ports == BIT(PORT_B))
+ dsi_trans = TRANSCODER_DSI_1;
+ else
+ dsi_trans = TRANSCODER_DSI_0;
+
+ val = intel_de_read(dev_priv, 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)
{
@@ -1443,6 +1459,10 @@ 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(intel_dsi))
+ pipe_config->hw.adjusted_mode.private_flags |=
+ I915_MODE_FLAG_DSI_PERIODIC_CMD_MODE;
}
static int gen11_dsi_dsc_compute_config(struct intel_encoder *encoder,
@@ -1526,6 +1546,10 @@ static int gen11_dsi_compute_config(struct intel_encoder
*encoder,
pipe_config->port_clock = afe_clk(encoder, pipe_config) / 5;
+ /* We would not operate in periodic 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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