This patch enables DSI transcoders by writing to
TRANS_CONF registers and wait for its state to be enabled.
Signed-off-by: Madhav Chauhan <madhav.chauhan@xxxxxxxxx>
---
drivers/gpu/drm/i915/icl_dsi.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index e7f6005..ae8877a 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -596,6 +596,28 @@ static void gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder,
}
}
+static void gen11_dsi_enable_transcoder(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ enum port port;
+ enum transcoder dsi_trans;
+ u32 tmp;
+
+ for_each_dsi_port(port, intel_dsi->ports) {
+ dsi_trans = dsi_port_to_transcoder(port);
+ tmp = I915_READ(PIPECONF(dsi_trans));
+ tmp |= PIPECONF_ENABLE;
+ I915_WRITE(PIPECONF(dsi_trans), tmp);
+
+ /* wait for transcoder to be enabled */
+ if (intel_wait_for_register(dev_priv, PIPECONF(dsi_trans),
+ I965_PIPECONF_ACTIVE,
+ I965_PIPECONF_ACTIVE, 10))
+ DRM_ERROR("DSI transcoder not enabled\n");
+ }
+}
+
static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config)
{
@@ -635,4 +657,6 @@ gen11_dsi_pre_enable(struct intel_encoder *encoder,
/* step6c: configure transcoder timings */
gen11_dsi_set_transcoder_timings(encoder, pipe_config);
+ /* step6d: enable dsi transcoder */
+ gen11_dsi_enable_transcoder(encoder);
}
--
2.7.4
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