diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_hdmi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_hdmi.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 3eec74ca5116..1d623b5e09d6 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -34,6 +34,7 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_edid.h> +#include <drm/drm_scdc_helper.h> #include "intel_drv.h" #include <drm/i915_drm.h> #include <drm/intel_lpe_audio.h> @@ -1208,6 +1209,8 @@ static int intel_hdmi_source_max_tmds_clock(struct drm_i915_private *dev_priv) { if (IS_G4X(dev_priv)) return 165000; + else if (IS_GEMINILAKE(dev_priv)) + return 594000; else if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8) return 300000; else @@ -1334,6 +1337,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder, struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; + struct drm_scdc *scdc = &conn_state->connector->display_info.hdmi.scdc; int clock_8bpc = pipe_config->base.adjusted_mode.crtc_clock; int clock_12bpc = clock_8bpc * 3 / 2; int desired_bpp; @@ -1403,6 +1407,16 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder, pipe_config->lane_count = 4; + if (scdc->scrambling.supported && IS_GEMINILAKE(dev_priv)) { + if (scdc->scrambling.low_rates) + pipe_config->hdmi_scrambling = true; + + if (pipe_config->port_clock > 340000) { + pipe_config->hdmi_scrambling = true; + pipe_config->hdmi_high_tmds_clock_ratio = true; + } + } + return true; } @@ -1812,6 +1826,57 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c intel_hdmi->aspect_ratio = HDMI_PICTURE_ASPECT_NONE; } +/* + * intel_hdmi_handle_sink_scrambling: handle sink scrambling/clock ratio setup + * @encoder: intel_encoder + * @connector: drm_connector + * @high_tmds_clock_ratio = bool to indicate if the function needs to set + * or reset the high tmds clock ratio for scrambling + * @scrambling: bool to Indicate if the function needs to set or reset + * sink scrambling + * + * This function handles scrambling on HDMI 2.0 capable sinks. + * If required clock rate is > 340 Mhz && scrambling is supported by sink + * it enables scrambling. This should be called before enabling the HDMI + * 2.0 port, as the sink can choose to disable the scrambling if it doesn't + * detect a scrambled clock within 100 ms. + */ +void intel_hdmi_handle_sink_scrambling(struct intel_encoder *encoder, + struct drm_connector *connector, + bool high_tmds_clock_ratio, + bool scrambling) +{ + struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base); + struct drm_i915_private *dev_priv = connector->dev->dev_private; + struct drm_scrambling *sink_scrambling = + &connector->display_info.hdmi.scdc.scrambling; + struct i2c_adapter *adptr = intel_gmbus_get_adapter(dev_priv, + intel_hdmi->ddc_bus); + bool ret; + + if (!sink_scrambling->supported) + return; + + DRM_DEBUG_KMS("Setting sink scrambling for enc:%s connector:%s\n", + encoder->base.name, connector->name); + + /* Set TMDS bit clock ratio to 1/40 or 1/10 */ + ret = drm_scdc_set_high_tmds_clock_ratio(adptr, high_tmds_clock_ratio); + if (!ret) { + DRM_ERROR("Set TMDS ratio failed\n"); + return; + } + + /* Enable/disable sink scrambling */ + ret = drm_scdc_set_scrambling(adptr, scrambling); + if (!ret) { + DRM_ERROR("Set sink scrambling failed\n"); + return; + } + + DRM_DEBUG_KMS("sink scrambling handled\n"); +} + static u8 intel_hdmi_ddc_pin(struct drm_i915_private *dev_priv, enum port port) { |