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drm/i915/dp: Enable/Disable DSC in DP Sink

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This patch enables decompression support in sink device
before link training and disables the same during the
DDI disabling.

v3 (From manasi):
* Pass bool state to enable/disable (Ville)
v2:(From Manasi)
* Change the enable/disable function to take crtc_state
instead of intel_dp as an argument (Manasi)
* Use the compression_enable flag as part of crtc_state (Manasi)

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181128202628.20238-6-manasi.d.navare@intel.com
This commit is contained in:
Gaurav K Singh
2018-11-28 12:26:17 -08:00
committed by Manasi Navare
parent 2799863145
commit 2279298dbf
3 changed files with 24 additions and 0 deletions
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16
drivers/gpu/drm/i915/intel_dp.c
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@@ -2857,6 +2857,22 @@ static bool downstream_hpd_needs_d0(struct intel_dp *intel_dp)
intel_dp->downstream_ports[0] & DP_DS_PORT_HPD;
}
void intel_dp_sink_set_decompression_state(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
bool enable)
{
int ret;
if (!crtc_state->dsc_params.compression_enable)
return;
ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_DSC_ENABLE,
enable ? DP_DECOMPRESSION_EN : 0);
if (ret < 0)
DRM_DEBUG_KMS("Failed to %s sink decompression state\n",
enable ? "enable" : "disable");
}
/* If the sink supports it, try to set the power state appropriately */
void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
{