diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_pch_display.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_pch_display.c b/drivers/gpu/drm/i915/display/intel_pch_display.c new file mode 100644 index 000000000000..a55c4bfacd0d --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_pch_display.c @@ -0,0 +1,501 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include "g4x_dp.h" +#include "intel_crt.h" +#include "intel_de.h" +#include "intel_display_types.h" +#include "intel_fdi.h" +#include "intel_lvds.h" +#include "intel_pch_display.h" +#include "intel_pch_refclk.h" +#include "intel_pps.h" +#include "intel_sdvo.h" + +static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv, + enum pipe pipe, enum port port, + i915_reg_t dp_reg) +{ + enum pipe port_pipe; + bool state; + + state = g4x_dp_port_enabled(dev_priv, dp_reg, port, &port_pipe); + + I915_STATE_WARN(state && port_pipe == pipe, + "PCH DP %c enabled on transcoder %c, should be disabled\n", + port_name(port), pipe_name(pipe)); + + I915_STATE_WARN(HAS_PCH_IBX(dev_priv) && !state && port_pipe == PIPE_B, + "IBX PCH DP %c still using transcoder B\n", + port_name(port)); +} + +static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv, + enum pipe pipe, enum port port, + i915_reg_t hdmi_reg) +{ + enum pipe port_pipe; + bool state; + + state = intel_sdvo_port_enabled(dev_priv, hdmi_reg, &port_pipe); + + I915_STATE_WARN(state && port_pipe == pipe, + "PCH HDMI %c enabled on transcoder %c, should be disabled\n", + port_name(port), pipe_name(pipe)); + + I915_STATE_WARN(HAS_PCH_IBX(dev_priv) && !state && port_pipe == PIPE_B, + "IBX PCH HDMI %c still using transcoder B\n", + port_name(port)); +} + +static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv, + enum pipe pipe) +{ + enum pipe port_pipe; + + assert_pch_dp_disabled(dev_priv, pipe, PORT_B, PCH_DP_B); + assert_pch_dp_disabled(dev_priv, pipe, PORT_C, PCH_DP_C); + assert_pch_dp_disabled(dev_priv, pipe, PORT_D, PCH_DP_D); + + I915_STATE_WARN(intel_crt_port_enabled(dev_priv, PCH_ADPA, &port_pipe) && + port_pipe == pipe, + "PCH VGA enabled on transcoder %c, should be disabled\n", + pipe_name(pipe)); + + I915_STATE_WARN(intel_lvds_port_enabled(dev_priv, PCH_LVDS, &port_pipe) && + port_pipe == pipe, + "PCH LVDS enabled on transcoder %c, should be disabled\n", + pipe_name(pipe)); + + /* PCH SDVOB multiplex with HDMIB */ + assert_pch_hdmi_disabled(dev_priv, pipe, PORT_B, PCH_HDMIB); + assert_pch_hdmi_disabled(dev_priv, pipe, PORT_C, PCH_HDMIC); + assert_pch_hdmi_disabled(dev_priv, pipe, PORT_D, PCH_HDMID); +} + +static void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv, + enum pipe pipe) +{ + u32 val; + bool enabled; + + val = intel_de_read(dev_priv, PCH_TRANSCONF(pipe)); + enabled = !!(val & TRANS_ENABLE); + I915_STATE_WARN(enabled, + "transcoder assertion failed, should be off on pipe %c but is still active\n", + pipe_name(pipe)); +} + +static void ilk_pch_transcoder_set_timings(const struct intel_crtc_state *crtc_state, + enum pipe pch_transcoder) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; + + intel_de_write(dev_priv, PCH_TRANS_HTOTAL(pch_transcoder), + intel_de_read(dev_priv, HTOTAL(cpu_transcoder))); + intel_de_write(dev_priv, PCH_TRANS_HBLANK(pch_transcoder), + intel_de_read(dev_priv, HBLANK(cpu_transcoder))); + intel_de_write(dev_priv, PCH_TRANS_HSYNC(pch_transcoder), + intel_de_read(dev_priv, HSYNC(cpu_transcoder))); + + intel_de_write(dev_priv, PCH_TRANS_VTOTAL(pch_transcoder), + intel_de_read(dev_priv, VTOTAL(cpu_transcoder))); + intel_de_write(dev_priv, PCH_TRANS_VBLANK(pch_transcoder), + intel_de_read(dev_priv, VBLANK(cpu_transcoder))); + intel_de_write(dev_priv, PCH_TRANS_VSYNC(pch_transcoder), + intel_de_read(dev_priv, VSYNC(cpu_transcoder))); + intel_de_write(dev_priv, PCH_TRANS_VSYNCSHIFT(pch_transcoder), + intel_de_read(dev_priv, VSYNCSHIFT(cpu_transcoder))); +} + +static void ilk_enable_pch_transcoder(const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + i915_reg_t reg; + u32 val, pipeconf_val; + + /* Make sure PCH DPLL is enabled */ + assert_shared_dpll_enabled(dev_priv, crtc_state->shared_dpll); + + /* FDI must be feeding us bits for PCH ports */ + assert_fdi_tx_enabled(dev_priv, pipe); + assert_fdi_rx_enabled(dev_priv, pipe); + + if (HAS_PCH_CPT(dev_priv)) { + reg = TRANS_CHICKEN2(pipe); + val = intel_de_read(dev_priv, reg); + /* + * Workaround: Set the timing override bit + * before enabling the pch transcoder. + */ + val |= TRANS_CHICKEN2_TIMING_OVERRIDE; + /* Configure frame start delay to match the CPU */ + val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK; + val |= TRANS_CHICKEN2_FRAME_START_DELAY(dev_priv->framestart_delay - 1); + intel_de_write(dev_priv, reg, val); + } + + reg = PCH_TRANSCONF(pipe); + val = intel_de_read(dev_priv, reg); + pipeconf_val = intel_de_read(dev_priv, PIPECONF(pipe)); + + if (HAS_PCH_IBX(dev_priv)) { + /* Configure frame start delay to match the CPU */ + val &= ~TRANS_FRAME_START_DELAY_MASK; + val |= TRANS_FRAME_START_DELAY(dev_priv->framestart_delay - 1); + + /* + * Make the BPC in transcoder be consistent with + * that in pipeconf reg. For HDMI we must use 8bpc + * here for both 8bpc and 12bpc. + */ + val &= ~PIPECONF_BPC_MASK; + if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) + val |= PIPECONF_8BPC; + else + val |= pipeconf_val & PIPECONF_BPC_MASK; + } + + val &= ~TRANS_INTERLACE_MASK; + if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK) { + if (HAS_PCH_IBX(dev_priv) && + intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO)) + val |= TRANS_LEGACY_INTERLACED_ILK; + else + val |= TRANS_INTERLACED; + } else { + val |= TRANS_PROGRESSIVE; + } + + intel_de_write(dev_priv, reg, val | TRANS_ENABLE); + if (intel_de_wait_for_set(dev_priv, reg, TRANS_STATE_ENABLE, 100)) + drm_err(&dev_priv->drm, "failed to enable transcoder %c\n", + pipe_name(pipe)); +} + +static void ilk_disable_pch_transcoder(struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + i915_reg_t reg; + u32 val; + + /* FDI relies on the transcoder */ + assert_fdi_tx_disabled(dev_priv, pipe); + assert_fdi_rx_disabled(dev_priv, pipe); + + /* Ports must be off as well */ + assert_pch_ports_disabled(dev_priv, pipe); + + reg = PCH_TRANSCONF(pipe); + val = intel_de_read(dev_priv, reg); + val &= ~TRANS_ENABLE; + intel_de_write(dev_priv, reg, val); + /* wait for PCH transcoder off, transcoder state */ + if (intel_de_wait_for_clear(dev_priv, reg, TRANS_STATE_ENABLE, 50)) + drm_err(&dev_priv->drm, "failed to disable transcoder %c\n", + pipe_name(pipe)); + + if (HAS_PCH_CPT(dev_priv)) { + /* Workaround: Clear the timing override chicken bit again. */ + reg = TRANS_CHICKEN2(pipe); + val = intel_de_read(dev_priv, reg); + val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE; + intel_de_write(dev_priv, reg, val); + } +} + +/* + * Enable PCH resources required for PCH ports: + * - PCH PLLs + * - FDI training & RX/TX + * - update transcoder timings + * - DP transcoding bits + * - transcoder + */ +void ilk_pch_enable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + const struct intel_crtc_state *crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + enum pipe pipe = crtc->pipe; + u32 temp; + + assert_pch_transcoder_disabled(dev_priv, pipe); + + /* For PCH output, training FDI link */ + intel_fdi_link_train(crtc, crtc_state); + + /* + * We need to program the right clock selection + * before writing the pixel multiplier into the DPLL. + */ + if (HAS_PCH_CPT(dev_priv)) { + u32 sel; + + temp = intel_de_read(dev_priv, PCH_DPLL_SEL); + temp |= TRANS_DPLL_ENABLE(pipe); + sel = TRANS_DPLLB_SEL(pipe); + if (crtc_state->shared_dpll == + intel_get_shared_dpll_by_id(dev_priv, DPLL_ID_PCH_PLL_B)) + temp |= sel; + else + temp &= ~sel; + intel_de_write(dev_priv, PCH_DPLL_SEL, temp); + } + + /* + * XXX: pch pll's can be enabled any time before we enable the PCH + * transcoder, and we actually should do this to not upset any PCH + * transcoder that already use the clock when we share it. + * + * Note that enable_shared_dpll tries to do the right thing, but + * get_shared_dpll unconditionally resets the pll - we need that + * to have the right LVDS enable sequence. + */ + intel_enable_shared_dpll(crtc_state); + + /* set transcoder timing, panel must allow it */ + assert_pps_unlocked(dev_priv, pipe); + ilk_pch_transcoder_set_timings(crtc_state, pipe); + + intel_fdi_normal_train(crtc); + + /* For PCH DP, enable TRANS_DP_CTL */ + if (HAS_PCH_CPT(dev_priv) && + intel_crtc_has_dp_encoder(crtc_state)) { + const struct drm_display_mode *adjusted_mode = + &crtc_state->hw.adjusted_mode; + u32 bpc = (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) >> 5; + i915_reg_t reg = TRANS_DP_CTL(pipe); + enum port port; + + temp = intel_de_read(dev_priv, reg); + temp &= ~(TRANS_DP_PORT_SEL_MASK | + TRANS_DP_SYNC_MASK | + TRANS_DP_BPC_MASK); + temp |= TRANS_DP_OUTPUT_ENABLE; + temp |= bpc << 9; /* same format but at 11:9 */ + + if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) + temp |= TRANS_DP_HSYNC_ACTIVE_HIGH; + if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) + temp |= TRANS_DP_VSYNC_ACTIVE_HIGH; + + port = intel_get_crtc_new_encoder(state, crtc_state)->port; + drm_WARN_ON(&dev_priv->drm, port < PORT_B || port > PORT_D); + temp |= TRANS_DP_PORT_SEL(port); + + intel_de_write(dev_priv, reg, temp); + } + + ilk_enable_pch_transcoder(crtc_state); +} + +void ilk_pch_disable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + ilk_fdi_disable(crtc); +} + +void ilk_pch_post_disable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + + ilk_disable_pch_transcoder(crtc); + + if (HAS_PCH_CPT(dev_priv)) { + i915_reg_t reg; + u32 temp; + + /* disable TRANS_DP_CTL */ + reg = TRANS_DP_CTL(pipe); + temp = intel_de_read(dev_priv, reg); + temp &= ~(TRANS_DP_OUTPUT_ENABLE | + TRANS_DP_PORT_SEL_MASK); + temp |= TRANS_DP_PORT_SEL_NONE; + intel_de_write(dev_priv, reg, temp); + + /* disable DPLL_SEL */ + temp = intel_de_read(dev_priv, PCH_DPLL_SEL); + temp &= ~(TRANS_DPLL_ENABLE(pipe) | TRANS_DPLLB_SEL(pipe)); + intel_de_write(dev_priv, PCH_DPLL_SEL, temp); + } + + ilk_fdi_pll_disable(crtc); +} + +static void ilk_pch_clock_get(struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + + /* read out port_clock from the DPLL */ + i9xx_crtc_clock_get(crtc, crtc_state); + + /* + * In case there is an active pipe without active ports, + * we may need some idea for the dotclock anyway. + * Calculate one based on the FDI configuration. + */ + crtc_state->hw.adjusted_mode.crtc_clock = + intel_dotclock_calculate(intel_fdi_link_freq(dev_priv, crtc_state), + &crtc_state->fdi_m_n); +} + +void ilk_pch_get_config(struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + struct intel_shared_dpll *pll; + enum pipe pipe = crtc->pipe; + enum intel_dpll_id pll_id; + bool pll_active; + u32 tmp; + + if ((intel_de_read(dev_priv, PCH_TRANSCONF(pipe)) & TRANS_ENABLE) == 0) + return; + + crtc_state->has_pch_encoder = true; + + tmp = intel_de_read(dev_priv, FDI_RX_CTL(pipe)); + crtc_state->fdi_lanes = ((FDI_DP_PORT_WIDTH_MASK & tmp) >> + FDI_DP_PORT_WIDTH_SHIFT) + 1; + + ilk_get_fdi_m_n_config(crtc, crtc_state); + + if (HAS_PCH_IBX(dev_priv)) { + /* + * The pipe->pch transcoder and pch transcoder->pll + * mapping is fixed. + */ + pll_id = (enum intel_dpll_id) pipe; + } else { + tmp = intel_de_read(dev_priv, PCH_DPLL_SEL); + if (tmp & TRANS_DPLLB_SEL(pipe)) + pll_id = DPLL_ID_PCH_PLL_B; + else + pll_id = DPLL_ID_PCH_PLL_A; + } + + crtc_state->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, pll_id); + pll = crtc_state->shared_dpll; + + pll_active = intel_dpll_get_hw_state(dev_priv, pll, + &crtc_state->dpll_hw_state); + drm_WARN_ON(&dev_priv->drm, !pll_active); + + tmp = crtc_state->dpll_hw_state.dpll; + crtc_state->pixel_multiplier = + ((tmp & PLL_REF_SDVO_HDMI_MULTIPLIER_MASK) + >> PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT) + 1; + + ilk_pch_clock_get(crtc_state); +} + +static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv, + enum transcoder cpu_transcoder) +{ + u32 val, pipeconf_val; + + /* FDI must be feeding us bits for PCH ports */ + assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder); + assert_fdi_rx_enabled(dev_priv, PIPE_A); + + val = intel_de_read(dev_priv, TRANS_CHICKEN2(PIPE_A)); + /* Workaround: set timing override bit. */ + val |= TRANS_CHICKEN2_TIMING_OVERRIDE; + /* Configure frame start delay to match the CPU */ + val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK; + val |= TRANS_CHICKEN2_FRAME_START_DELAY(dev_priv->framestart_delay - 1); + intel_de_write(dev_priv, TRANS_CHICKEN2(PIPE_A), val); + + val = TRANS_ENABLE; + pipeconf_val = intel_de_read(dev_priv, PIPECONF(cpu_transcoder)); + + if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) == + PIPECONF_INTERLACED_ILK) + val |= TRANS_INTERLACED; + else + val |= TRANS_PROGRESSIVE; + + intel_de_write(dev_priv, LPT_TRANSCONF, val); + if (intel_de_wait_for_set(dev_priv, LPT_TRANSCONF, + TRANS_STATE_ENABLE, 100)) + drm_err(&dev_priv->drm, "Failed to enable PCH transcoder\n"); +} + +static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv) +{ + u32 val; + + val = intel_de_read(dev_priv, LPT_TRANSCONF); + val &= ~TRANS_ENABLE; + intel_de_write(dev_priv, LPT_TRANSCONF, val); + /* wait for PCH transcoder off, transcoder state */ + if (intel_de_wait_for_clear(dev_priv, LPT_TRANSCONF, + TRANS_STATE_ENABLE, 50)) + drm_err(&dev_priv->drm, "Failed to disable PCH transcoder\n"); + + /* Workaround: clear timing override bit. */ + val = intel_de_read(dev_priv, TRANS_CHICKEN2(PIPE_A)); + val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE; + intel_de_write(dev_priv, TRANS_CHICKEN2(PIPE_A), val); +} + +void lpt_pch_enable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + const struct intel_crtc_state *crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; + + assert_pch_transcoder_disabled(dev_priv, PIPE_A); + + lpt_program_iclkip(crtc_state); + + /* Set transcoder timing. */ + ilk_pch_transcoder_set_timings(crtc_state, PIPE_A); + + lpt_enable_pch_transcoder(dev_priv, cpu_transcoder); +} + +void lpt_pch_disable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + + lpt_disable_pch_transcoder(dev_priv); + + lpt_disable_iclkip(dev_priv); +} + +void lpt_pch_get_config(struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + u32 tmp; + + if ((intel_de_read(dev_priv, LPT_TRANSCONF) & TRANS_ENABLE) == 0) + return; + + crtc_state->has_pch_encoder = true; + + tmp = intel_de_read(dev_priv, FDI_RX_CTL(PIPE_A)); + crtc_state->fdi_lanes = ((FDI_DP_PORT_WIDTH_MASK & tmp) >> + FDI_DP_PORT_WIDTH_SHIFT) + 1; + + ilk_get_fdi_m_n_config(crtc, crtc_state); + + crtc_state->hw.adjusted_mode.crtc_clock = lpt_get_iclkip(dev_priv); +} |