From: Madhav Chauhan <madhav.chauhan@xxxxxxxxx>
As part of DSI disabling sequence, DSI link need to enter
in ULPS by writing into DSI_LP_MSG register. This patch
does the same using a wrapper function.
Signed-off-by: Madhav Chauhan <madhav.chauhan@xxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/icl_dsi.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index a7b1a9eae04b..83c422d5976c 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -812,6 +812,29 @@ static void gen11_dsi_powerdown_panel(struct intel_encoder *encoder)
wait_for_cmds_dispatched_to_panel(encoder);
}
+static void gen11_dsi_deconfigure_trancoder(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;
+
+ /* put dsi link in ULPS */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ dsi_trans = dsi_port_to_transcoder(port);
+ tmp = I915_READ(DSI_LP_MSG(dsi_trans));
+ tmp |= LINK_ENTER_ULPS;
+ tmp &= ~LINK_ULPS_TYPE_LP11;
+ I915_WRITE(DSI_LP_MSG(dsi_trans), tmp);
+
+ if (wait_for_us((I915_READ(DSI_LP_MSG(dsi_trans)) &
+ LINK_IN_ULPS),
+ 10))
+ DRM_ERROR("DSI link not in ULPS\n");
+ }
+}
+
static void __attribute__((unused)) gen11_dsi_disable(
struct intel_encoder *encoder,
const struct intel_crtc_state *old_crtc_state,
@@ -828,4 +851,7 @@ static void __attribute__((unused)) gen11_dsi_disable(
/* step2f,g: powerdown panel */
gen11_dsi_powerdown_panel(encoder);
+
+ /* step2h,i,j: deconfig trancoder */
+ gen11_dsi_deconfigure_trancoder(encoder);
}
--
2.11.0
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