diff options
| author | Madhav Chauhan <madhav.chauhan@intel.com> | 2018-10-30 14:56:16 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2018-10-31 14:13:27 +0300 |
| commit | 4769b598b94383bacd211caa2285e264c5e50498 (patch) | |
| tree | 51bf5225d0d0718fbedb343dbd762384e1649535 | |
| parent | 522cc3f717ac19a68847aee9831cb1e39f51f8dd (diff) | |
| download | linux-4769b598b94383bacd211caa2285e264c5e50498.tar.xz | |
drm/i915/icl: Put DSI link in ULPS
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@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/50812f4bd37f95c053bef7eef4a95e5da029546f.1540900289.git.jani.nikula@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/icl_dsi.c | 26 |
1 files changed, 26 insertions, 0 deletions
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); } |