The function has become quite long, and the switch-case statement quite complex with the fallthrougs. Simplify by splitting to individual functions and an if-ladder.
This highlights how TRANS_DDI_MODE_SELECT_FDI_OR_128B132B works on different platforms. Reviewed-by: Imre Deak <[email protected]> Signed-off-by: Jani Nikula <[email protected]> --- drivers/gpu/drm/i915/display/intel_ddi.c | 210 +++++++++++++---------- 1 file changed, 123 insertions(+), 87 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index f8edb604d462..607c983f07ef 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -3908,15 +3908,122 @@ static void bdw_get_trans_port_sync_config(struct intel_crtc_state *crtc_state) crtc_state->sync_mode_slaves_mask); } +static void intel_ddi_read_func_ctl_dvi(struct intel_encoder *encoder, + struct intel_crtc_state *crtc_state, + u32 ddi_func_ctl) +{ + struct intel_display *display = to_intel_display(encoder); + + crtc_state->output_types |= BIT(INTEL_OUTPUT_HDMI); + if (DISPLAY_VER(display) >= 14) + crtc_state->lane_count = + ((ddi_func_ctl & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; + else + crtc_state->lane_count = 4; +} + +static void intel_ddi_read_func_ctl_hdmi(struct intel_encoder *encoder, + struct intel_crtc_state *crtc_state, + u32 ddi_func_ctl) +{ + crtc_state->has_hdmi_sink = true; + + crtc_state->infoframes.enable |= + intel_hdmi_infoframes_enabled(encoder, crtc_state); + + if (crtc_state->infoframes.enable) + crtc_state->has_infoframe = true; + + if (ddi_func_ctl & TRANS_DDI_HDMI_SCRAMBLING) + crtc_state->hdmi_scrambling = true; + if (ddi_func_ctl & TRANS_DDI_HIGH_TMDS_CHAR_RATE) + crtc_state->hdmi_high_tmds_clock_ratio = true; + + intel_ddi_read_func_ctl_dvi(encoder, crtc_state, ddi_func_ctl); +} + +static void intel_ddi_read_func_ctl_fdi(struct intel_encoder *encoder, + struct intel_crtc_state *crtc_state, + u32 ddi_func_ctl) +{ + struct intel_display *display = to_intel_display(encoder); + + crtc_state->output_types |= BIT(INTEL_OUTPUT_ANALOG); + crtc_state->enhanced_framing = + intel_de_read(display, dp_tp_ctl_reg(encoder, crtc_state)) & + DP_TP_CTL_ENHANCED_FRAME_ENABLE; +} + +static void intel_ddi_read_func_ctl_dp_sst(struct intel_encoder *encoder, + struct intel_crtc_state *crtc_state, + u32 ddi_func_ctl) +{ + struct intel_display *display = to_intel_display(encoder); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct intel_digital_port *dig_port = enc_to_dig_port(encoder); + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; + + if (encoder->type == INTEL_OUTPUT_EDP) + crtc_state->output_types |= BIT(INTEL_OUTPUT_EDP); + else + crtc_state->output_types |= BIT(INTEL_OUTPUT_DP); + crtc_state->lane_count = + ((ddi_func_ctl & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; + + intel_cpu_transcoder_get_m1_n1(crtc, cpu_transcoder, &crtc_state->dp_m_n); + intel_cpu_transcoder_get_m2_n2(crtc, cpu_transcoder, &crtc_state->dp_m2_n2); + + crtc_state->enhanced_framing = + intel_de_read(display, dp_tp_ctl_reg(encoder, crtc_state)) & + DP_TP_CTL_ENHANCED_FRAME_ENABLE; + + if (DISPLAY_VER(display) >= 11) + crtc_state->fec_enable = + intel_de_read(display, + dp_tp_ctl_reg(encoder, crtc_state)) & DP_TP_CTL_FEC_ENABLE; + + if (dig_port->lspcon.active && intel_dp_has_hdmi_sink(&dig_port->dp)) + crtc_state->infoframes.enable |= + intel_lspcon_infoframes_enabled(encoder, crtc_state); + else + crtc_state->infoframes.enable |= + intel_hdmi_infoframes_enabled(encoder, crtc_state); +} + +static void intel_ddi_read_func_ctl_dp_mst(struct intel_encoder *encoder, + struct intel_crtc_state *crtc_state, + u32 ddi_func_ctl) +{ + struct intel_display *display = to_intel_display(encoder); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; + + crtc_state->output_types |= BIT(INTEL_OUTPUT_DP_MST); + crtc_state->lane_count = + ((ddi_func_ctl & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; + + if (DISPLAY_VER(display) >= 12) + crtc_state->mst_master_transcoder = + REG_FIELD_GET(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, ddi_func_ctl); + + intel_cpu_transcoder_get_m1_n1(crtc, cpu_transcoder, &crtc_state->dp_m_n); + + if (DISPLAY_VER(display) >= 11) + crtc_state->fec_enable = + intel_de_read(display, + dp_tp_ctl_reg(encoder, crtc_state)) & DP_TP_CTL_FEC_ENABLE; + + crtc_state->infoframes.enable |= + intel_hdmi_infoframes_enabled(encoder, crtc_state); +} + static void intel_ddi_read_func_ctl(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { struct intel_display *display = to_intel_display(encoder); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); - struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); enum transcoder cpu_transcoder = pipe_config->cpu_transcoder; - struct intel_digital_port *dig_port = enc_to_dig_port(encoder); - u32 ddi_func_ctl, flags = 0; + u32 ddi_func_ctl, ddi_mode, flags = 0; ddi_func_ctl = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(dev_priv, cpu_transcoder)); if (ddi_func_ctl & TRANS_DDI_PHSYNC) @@ -3947,90 +4054,19 @@ static void intel_ddi_read_func_ctl(struct intel_encoder *encoder, break; } - switch (ddi_func_ctl & TRANS_DDI_MODE_SELECT_MASK) { - case TRANS_DDI_MODE_SELECT_HDMI: - pipe_config->has_hdmi_sink = true; - - pipe_config->infoframes.enable |= - intel_hdmi_infoframes_enabled(encoder, pipe_config); - - if (pipe_config->infoframes.enable) - pipe_config->has_infoframe = true; - - if (ddi_func_ctl & TRANS_DDI_HDMI_SCRAMBLING) - pipe_config->hdmi_scrambling = true; - if (ddi_func_ctl & TRANS_DDI_HIGH_TMDS_CHAR_RATE) - pipe_config->hdmi_high_tmds_clock_ratio = true; - fallthrough; - case TRANS_DDI_MODE_SELECT_DVI: - pipe_config->output_types |= BIT(INTEL_OUTPUT_HDMI); - if (DISPLAY_VER(dev_priv) >= 14) - pipe_config->lane_count = - ((ddi_func_ctl & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; - else - pipe_config->lane_count = 4; - break; - case TRANS_DDI_MODE_SELECT_DP_SST: - if (encoder->type == INTEL_OUTPUT_EDP) - pipe_config->output_types |= BIT(INTEL_OUTPUT_EDP); - else - pipe_config->output_types |= BIT(INTEL_OUTPUT_DP); - pipe_config->lane_count = - ((ddi_func_ctl & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; - - intel_cpu_transcoder_get_m1_n1(crtc, cpu_transcoder, - &pipe_config->dp_m_n); - intel_cpu_transcoder_get_m2_n2(crtc, cpu_transcoder, - &pipe_config->dp_m2_n2); - - pipe_config->enhanced_framing = - intel_de_read(dev_priv, dp_tp_ctl_reg(encoder, pipe_config)) & - DP_TP_CTL_ENHANCED_FRAME_ENABLE; - - if (DISPLAY_VER(dev_priv) >= 11) - pipe_config->fec_enable = - intel_de_read(dev_priv, - dp_tp_ctl_reg(encoder, pipe_config)) & DP_TP_CTL_FEC_ENABLE; - - if (dig_port->lspcon.active && intel_dp_has_hdmi_sink(&dig_port->dp)) - pipe_config->infoframes.enable |= - intel_lspcon_infoframes_enabled(encoder, pipe_config); - else - pipe_config->infoframes.enable |= - intel_hdmi_infoframes_enabled(encoder, pipe_config); - break; - case TRANS_DDI_MODE_SELECT_FDI_OR_128B132B: - if (!HAS_DP20(display)) { - /* FDI */ - pipe_config->output_types |= BIT(INTEL_OUTPUT_ANALOG); - pipe_config->enhanced_framing = - intel_de_read(dev_priv, dp_tp_ctl_reg(encoder, pipe_config)) & - DP_TP_CTL_ENHANCED_FRAME_ENABLE; - break; - } - fallthrough; /* 128b/132b */ - case TRANS_DDI_MODE_SELECT_DP_MST: - pipe_config->output_types |= BIT(INTEL_OUTPUT_DP_MST); - pipe_config->lane_count = - ((ddi_func_ctl & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; - - if (DISPLAY_VER(dev_priv) >= 12) - pipe_config->mst_master_transcoder = - REG_FIELD_GET(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, ddi_func_ctl); - - intel_cpu_transcoder_get_m1_n1(crtc, cpu_transcoder, - &pipe_config->dp_m_n); - - if (DISPLAY_VER(dev_priv) >= 11) - pipe_config->fec_enable = - intel_de_read(dev_priv, - dp_tp_ctl_reg(encoder, pipe_config)) & DP_TP_CTL_FEC_ENABLE; - - pipe_config->infoframes.enable |= - intel_hdmi_infoframes_enabled(encoder, pipe_config); - break; - default: - break; + ddi_mode = ddi_func_ctl & TRANS_DDI_MODE_SELECT_MASK; + + if (ddi_mode == TRANS_DDI_MODE_SELECT_HDMI) { + intel_ddi_read_func_ctl_hdmi(encoder, pipe_config, ddi_func_ctl); + } else if (ddi_mode == TRANS_DDI_MODE_SELECT_DVI) { + intel_ddi_read_func_ctl_dvi(encoder, pipe_config, ddi_func_ctl); + } else if (ddi_mode == TRANS_DDI_MODE_SELECT_FDI_OR_128B132B && !HAS_DP20(display)) { + intel_ddi_read_func_ctl_fdi(encoder, pipe_config, ddi_func_ctl); + } else if (ddi_mode == TRANS_DDI_MODE_SELECT_DP_SST) { + intel_ddi_read_func_ctl_dp_sst(encoder, pipe_config, ddi_func_ctl); + } else if (ddi_mode == TRANS_DDI_MODE_SELECT_DP_MST || + (ddi_mode == TRANS_DDI_MODE_SELECT_FDI_OR_128B132B && HAS_DP20(display))) { + intel_ddi_read_func_ctl_dp_mst(encoder, pipe_config, ddi_func_ctl); } } -- 2.39.5
