diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_crt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_crt.c | 1069 |
1 files changed, 1069 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_crt.c b/drivers/gpu/drm/i915/display/intel_crt.c new file mode 100644 index 000000000000..3fcf2f84bcce --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_crt.c @@ -0,0 +1,1069 @@ +/* + * Copyright © 2006-2007 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: + * Eric Anholt <eric@anholt.net> + */ + +#include <linux/dmi.h> +#include <linux/i2c.h> +#include <linux/slab.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_edid.h> +#include <drm/drm_probe_helper.h> +#include <drm/i915_drm.h> + +#include "i915_drv.h" +#include "intel_connector.h" +#include "intel_crt.h" +#include "intel_ddi.h" +#include "intel_drv.h" +#include "intel_fifo_underrun.h" +#include "intel_gmbus.h" +#include "intel_hotplug.h" + +/* Here's the desired hotplug mode */ +#define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \ + ADPA_CRT_HOTPLUG_WARMUP_10MS | \ + ADPA_CRT_HOTPLUG_SAMPLE_4S | \ + ADPA_CRT_HOTPLUG_VOLTAGE_50 | \ + ADPA_CRT_HOTPLUG_VOLREF_325MV | \ + ADPA_CRT_HOTPLUG_ENABLE) + +struct intel_crt { + struct intel_encoder base; + /* DPMS state is stored in the connector, which we need in the + * encoder's enable/disable callbacks */ + struct intel_connector *connector; + bool force_hotplug_required; + i915_reg_t adpa_reg; +}; + +static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder) +{ + return container_of(encoder, struct intel_crt, base); +} + +static struct intel_crt *intel_attached_crt(struct drm_connector *connector) +{ + return intel_encoder_to_crt(intel_attached_encoder(connector)); +} + +bool intel_crt_port_enabled(struct drm_i915_private *dev_priv, + i915_reg_t adpa_reg, enum pipe *pipe) +{ + u32 val; + + val = I915_READ(adpa_reg); + + /* asserts want to know the pipe even if the port is disabled */ + if (HAS_PCH_CPT(dev_priv)) + *pipe = (val & ADPA_PIPE_SEL_MASK_CPT) >> ADPA_PIPE_SEL_SHIFT_CPT; + else + *pipe = (val & ADPA_PIPE_SEL_MASK) >> ADPA_PIPE_SEL_SHIFT; + + return val & ADPA_DAC_ENABLE; +} + +static bool intel_crt_get_hw_state(struct intel_encoder *encoder, + enum pipe *pipe) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_crt *crt = intel_encoder_to_crt(encoder); + intel_wakeref_t wakeref; + bool ret; + + wakeref = intel_display_power_get_if_enabled(dev_priv, + encoder->power_domain); + if (!wakeref) + return false; + + ret = intel_crt_port_enabled(dev_priv, crt->adpa_reg, pipe); + + intel_display_power_put(dev_priv, encoder->power_domain, wakeref); + + return ret; +} + +static unsigned int intel_crt_get_flags(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_crt *crt = intel_encoder_to_crt(encoder); + u32 tmp, flags = 0; + + tmp = I915_READ(crt->adpa_reg); + + if (tmp & ADPA_HSYNC_ACTIVE_HIGH) + flags |= DRM_MODE_FLAG_PHSYNC; + else + flags |= DRM_MODE_FLAG_NHSYNC; + + if (tmp & ADPA_VSYNC_ACTIVE_HIGH) + flags |= DRM_MODE_FLAG_PVSYNC; + else + flags |= DRM_MODE_FLAG_NVSYNC; + + return flags; +} + +static void intel_crt_get_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config) +{ + pipe_config->output_types |= BIT(INTEL_OUTPUT_ANALOG); + + pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder); + + pipe_config->base.adjusted_mode.crtc_clock = pipe_config->port_clock; +} + +static void hsw_crt_get_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + intel_ddi_get_config(encoder, pipe_config); + + pipe_config->base.adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC | + DRM_MODE_FLAG_NHSYNC | + DRM_MODE_FLAG_PVSYNC | + DRM_MODE_FLAG_NVSYNC); + pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder); + + pipe_config->base.adjusted_mode.crtc_clock = lpt_get_iclkip(dev_priv); +} + +/* Note: The caller is required to filter out dpms modes not supported by the + * platform. */ +static void intel_crt_set_dpms(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + int mode) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_crt *crt = intel_encoder_to_crt(encoder); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); + const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode; + u32 adpa; + + if (INTEL_GEN(dev_priv) >= 5) + adpa = ADPA_HOTPLUG_BITS; + else + adpa = 0; + + if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) + adpa |= ADPA_HSYNC_ACTIVE_HIGH; + if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) + adpa |= ADPA_VSYNC_ACTIVE_HIGH; + + /* For CPT allow 3 pipe config, for others just use A or B */ + if (HAS_PCH_LPT(dev_priv)) + ; /* Those bits don't exist here */ + else if (HAS_PCH_CPT(dev_priv)) + adpa |= ADPA_PIPE_SEL_CPT(crtc->pipe); + else + adpa |= ADPA_PIPE_SEL(crtc->pipe); + + if (!HAS_PCH_SPLIT(dev_priv)) + I915_WRITE(BCLRPAT(crtc->pipe), 0); + + switch (mode) { + case DRM_MODE_DPMS_ON: + adpa |= ADPA_DAC_ENABLE; + break; + case DRM_MODE_DPMS_STANDBY: + adpa |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; + break; + case DRM_MODE_DPMS_SUSPEND: + adpa |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; + break; + case DRM_MODE_DPMS_OFF: + adpa |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; + break; + } + + I915_WRITE(crt->adpa_reg, adpa); +} + +static void intel_disable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *old_crtc_state, + const struct drm_connector_state *old_conn_state) +{ + intel_crt_set_dpms(encoder, old_crtc_state, DRM_MODE_DPMS_OFF); +} + +static void pch_disable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *old_crtc_state, + const struct drm_connector_state *old_conn_state) +{ +} + +static void pch_post_disable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *old_crtc_state, + const struct drm_connector_state *old_conn_state) +{ + intel_disable_crt(encoder, old_crtc_state, old_conn_state); +} + +static void hsw_disable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *old_crtc_state, + const struct drm_connector_state *old_conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + WARN_ON(!old_crtc_state->has_pch_encoder); + + intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false); +} + +static void hsw_post_disable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *old_crtc_state, + const struct drm_connector_state *old_conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + intel_ddi_disable_pipe_clock(old_crtc_state); + + pch_post_disable_crt(encoder, old_crtc_state, old_conn_state); + + lpt_disable_pch_transcoder(dev_priv); + lpt_disable_iclkip(dev_priv); + + intel_ddi_fdi_post_disable(encoder, old_crtc_state, old_conn_state); + + WARN_ON(!old_crtc_state->has_pch_encoder); + + intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true); +} + +static void hsw_pre_pll_enable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + WARN_ON(!crtc_state->has_pch_encoder); + + intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false); +} + +static void hsw_pre_enable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); + enum pipe pipe = crtc->pipe; + + WARN_ON(!crtc_state->has_pch_encoder); + + intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false); + + dev_priv->display.fdi_link_train(crtc, crtc_state); + + intel_ddi_enable_pipe_clock(crtc_state); +} + +static void hsw_enable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); + enum pipe pipe = crtc->pipe; + + WARN_ON(!crtc_state->has_pch_encoder); + + intel_crt_set_dpms(encoder, crtc_state, DRM_MODE_DPMS_ON); + + intel_wait_for_vblank(dev_priv, pipe); + intel_wait_for_vblank(dev_priv, pipe); + intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true); + intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true); +} + +static void intel_enable_crt(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) +{ + intel_crt_set_dpms(encoder, crtc_state, DRM_MODE_DPMS_ON); +} + +static enum drm_mode_status +intel_crt_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct drm_device *dev = connector->dev; + struct drm_i915_private *dev_priv = to_i915(dev); + int max_dotclk = dev_priv->max_dotclk_freq; + int max_clock; + + if (mode->flags & DRM_MODE_FLAG_DBLSCAN) + return MODE_NO_DBLESCAN; + + if (mode->clock < 25000) + return MODE_CLOCK_LOW; + + if (HAS_PCH_LPT(dev_priv)) + max_clock = 180000; + else if (IS_VALLEYVIEW(dev_priv)) + /* + * 270 MHz due to current DPLL limits, + * DAC limit supposedly 355 MHz. + */ + max_clock = 270000; + else if (IS_GEN_RANGE(dev_priv, 3, 4)) + max_clock = 400000; + else + max_clock = 350000; + if (mode->clock > max_clock) + return MODE_CLOCK_HIGH; + + if (mode->clock > max_dotclk) + return MODE_CLOCK_HIGH; + + /* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */ + if (HAS_PCH_LPT(dev_priv) && + (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2)) + return MODE_CLOCK_HIGH; + + /* HSW/BDW FDI limited to 4k */ + if (mode->hdisplay > 4096) + return MODE_H_ILLEGAL; + + return MODE_OK; +} + +static int intel_crt_compute_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config, + struct drm_connector_state *conn_state) +{ + struct drm_display_mode *adjusted_mode = + &pipe_config->base.adjusted_mode; + + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) + return -EINVAL; + + pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; + + return 0; +} + +static int pch_crt_compute_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config, + struct drm_connector_state *conn_state) +{ + struct drm_display_mode *adjusted_mode = + &pipe_config->base.adjusted_mode; + + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) + return -EINVAL; + + pipe_config->has_pch_encoder = true; + pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; + + return 0; +} + +static int hsw_crt_compute_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config, + struct drm_connector_state *conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct drm_display_mode *adjusted_mode = + &pipe_config->base.adjusted_mode; + + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) + return -EINVAL; + + /* HSW/BDW FDI limited to 4k */ + if (adjusted_mode->crtc_hdisplay > 4096 || + adjusted_mode->crtc_hblank_start > 4096) + return -EINVAL; + + pipe_config->has_pch_encoder = true; + pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; + + /* LPT FDI RX only supports 8bpc. */ + if (HAS_PCH_LPT(dev_priv)) { + if (pipe_config->bw_constrained && pipe_config->pipe_bpp < 24) { + DRM_DEBUG_KMS("LPT only supports 24bpp\n"); + return -EINVAL; + } + + pipe_config->pipe_bpp = 24; + } + + /* FDI must always be 2.7 GHz */ + pipe_config->port_clock = 135000 * 2; + + return 0; +} + +static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct intel_crt *crt = intel_attached_crt(connector); + struct drm_i915_private *dev_priv = to_i915(dev); + u32 adpa; + bool ret; + + /* The first time through, trigger an explicit detection cycle */ + if (crt->force_hotplug_required) { + bool turn_off_dac = HAS_PCH_SPLIT(dev_priv); + u32 save_adpa; + + crt->force_hotplug_required = 0; + + save_adpa = adpa = I915_READ(crt->adpa_reg); + DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa); + + adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; + if (turn_off_dac) + adpa &= ~ADPA_DAC_ENABLE; + + I915_WRITE(crt->adpa_reg, adpa); + + if (intel_wait_for_register(&dev_priv->uncore, + crt->adpa_reg, + ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 0, + 1000)) + DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); + + if (turn_off_dac) { + I915_WRITE(crt->adpa_reg, save_adpa); + POSTING_READ(crt->adpa_reg); + } + } + + /* Check the status to see if both blue and green are on now */ + adpa = I915_READ(crt->adpa_reg); + if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) + ret = true; + else + ret = false; + DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret); + + return ret; +} + +static bool valleyview_crt_detect_hotplug(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct intel_crt *crt = intel_attached_crt(connector); + struct drm_i915_private *dev_priv = to_i915(dev); + bool reenable_hpd; + u32 adpa; + bool ret; + u32 save_adpa; + + /* + * Doing a force trigger causes a hpd interrupt to get sent, which can + * get us stuck in a loop if we're polling: + * - We enable power wells and reset the ADPA + * - output_poll_exec does force probe on VGA, triggering a hpd + * - HPD handler waits for poll to unlock dev->mode_config.mutex + * - output_poll_exec shuts off the ADPA, unlocks + * dev->mode_config.mutex + * - HPD handler runs, resets ADPA and brings us back to the start + * + * Just disable HPD interrupts here to prevent this + */ + reenable_hpd = intel_hpd_disable(dev_priv, crt->base.hpd_pin); + + save_adpa = adpa = I915_READ(crt->adpa_reg); + DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa); + + adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; + + I915_WRITE(crt->adpa_reg, adpa); + + if (intel_wait_for_register(&dev_priv->uncore, + crt->adpa_reg, + ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 0, + 1000)) { + DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); + I915_WRITE(crt->adpa_reg, save_adpa); + } + + /* Check the status to see if both blue and green are on now */ + adpa = I915_READ(crt->adpa_reg); + if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) + ret = true; + else + ret = false; + + DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret); + + if (reenable_hpd) + intel_hpd_enable(dev_priv, crt->base.hpd_pin); + + return ret; +} + +static bool intel_crt_detect_hotplug(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_i915_private *dev_priv = to_i915(dev); + u32 stat; + bool ret = false; + int i, tries = 0; + + if (HAS_PCH_SPLIT(dev_priv)) + return intel_ironlake_crt_detect_hotplug(connector); + + if (IS_VALLEYVIEW(dev_priv)) + return valleyview_crt_detect_hotplug(connector); + + /* + * On 4 series desktop, CRT detect sequence need to be done twice + * to get a reliable result. + */ + + if (IS_G45(dev_priv)) + tries = 2; + else + tries = 1; + + for (i = 0; i < tries ; i++) { + /* turn on the FORCE_DETECT */ + i915_hotplug_interrupt_update(dev_priv, + CRT_HOTPLUG_FORCE_DETECT, + CRT_HOTPLUG_FORCE_DETECT); + /* wait for FORCE_DETECT to go off */ + if (intel_wait_for_register(&dev_priv->uncore, PORT_HOTPLUG_EN, + CRT_HOTPLUG_FORCE_DETECT, 0, + 1000)) + DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off"); + } + + stat = I915_READ(PORT_HOTPLUG_STAT); + if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE) + ret = true; + + /* clear the interrupt we just generated, if any */ + I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS); + + i915_hotplug_interrupt_update(dev_priv, CRT_HOTPLUG_FORCE_DETECT, 0); + + return ret; +} + +static struct edid *intel_crt_get_edid(struct drm_connector *connector, + struct i2c_adapter *i2c) +{ + struct edid *edid; + + edid = drm_get_edid(connector, i2c); + + if (!edid && !intel_gmbus_is_forced_bit(i2c)) { + DRM_DEBUG_KMS("CRT GMBUS EDID read failed, retry using GPIO bit-banging\n"); + intel_gmbus_force_bit(i2c, true); + edid = drm_get_edid(connector, i2c); + intel_gmbus_force_bit(i2c, false); + } + + return edid; +} + +/* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */ +static int intel_crt_ddc_get_modes(struct drm_connector *connector, + struct i2c_adapter *adapter) +{ + struct edid *edid; + int ret; + + edid = intel_crt_get_edid(connector, adapter); + if (!edid) + return 0; + + ret = intel_connector_update_modes(connector, edid); + kfree(edid); + + return ret; +} + +static bool intel_crt_detect_ddc(struct drm_connector *connector) +{ + struct intel_crt *crt = intel_attached_crt(connector); + struct drm_i915_private *dev_priv = to_i915(crt->base.base.dev); + struct edid *edid; + struct i2c_adapter *i2c; + bool ret = false; + + BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG); + + i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin); + edid = intel_crt_get_edid(connector, i2c); + + if (edid) { + bool is_digital = edid->input & DRM_EDID_INPUT_DIGITAL; + + /* + * This may be a DVI-I connector with a shared DDC + * link between analog and digital outputs, so we + * have to check the EDID input spec of the attached device. + */ + if (!is_digital) { + DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n"); + ret = true; + } else { + DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n"); + } + } else { + DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n"); + } + + kfree(edid); + + return ret; +} + +static enum drm_connector_status +intel_crt_load_detect(struct intel_crt *crt, u32 pipe) +{ + struct drm_device *dev = crt->base.base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_uncore *uncore = &dev_priv->uncore; + u32 save_bclrpat; + u32 save_vtotal; + u32 vtotal, vactive; + u32 vsample; + u32 vblank, vblank_start, vblank_end; + u32 dsl; + i915_reg_t bclrpat_reg, vtotal_reg, + vblank_reg, vsync_reg, pipeconf_reg, pipe_dsl_reg; + u8 st00; + enum drm_connector_status status; + + DRM_DEBUG_KMS("starting load-detect on CRT\n"); + + bclrpat_reg = BCLRPAT(pipe); + vtotal_reg = VTOTAL(pipe); + vblank_reg = VBLANK(pipe); + vsync_reg = VSYNC(pipe); + pipeconf_reg = PIPECONF(pipe); + pipe_dsl_reg = PIPEDSL(pipe); + + save_bclrpat = intel_uncore_read(uncore, bclrpat_reg); + save_vtotal = intel_uncore_read(uncore, vtotal_reg); + vblank = intel_uncore_read(uncore, vblank_reg); + + vtotal = ((save_vtotal >> 16) & 0xfff) + 1; + vactive = (save_vtotal & 0x7ff) + 1; + + vblank_start = (vblank & 0xfff) + 1; + vblank_end = ((vblank >> 16) & 0xfff) + 1; + + /* Set the border color to purple. */ + intel_uncore_write(uncore, bclrpat_reg, 0x500050); + + if (!IS_GEN(dev_priv, 2)) { + u32 pipeconf = intel_uncore_read(uncore, pipeconf_reg); + intel_uncore_write(uncore, + pipeconf_reg, + pipeconf | PIPECONF_FORCE_BORDER); + intel_uncore_posting_read(uncore, pipeconf_reg); + /* Wait for next Vblank to substitue + * border color for Color info */ + intel_wait_for_vblank(dev_priv, pipe); + st00 = intel_uncore_read8(uncore, _VGA_MSR_WRITE); + status = ((st00 & (1 << 4)) != 0) ? + connector_status_connected : + connector_status_disconnected; + + intel_uncore_write(uncore, pipeconf_reg, pipeconf); + } else { + bool restore_vblank = false; + int count, detect; + + /* + * If there isn't any border, add some. + * Yes, this will flicker + */ + if (vblank_start <= vactive && vblank_end >= vtotal) { + u32 vsync = I915_READ(vsync_reg); + u32 vsync_start = (vsync & 0xffff) + 1; + + vblank_start = vsync_start; + intel_uncore_write(uncore, + vblank_reg, + (vblank_start - 1) | + ((vblank_end - 1) << 16)); + restore_vblank = true; + } + /* sample in the vertical border, selecting the larger one */ + if (vblank_start - vactive >= vtotal - vblank_end) + vsample = (vblank_start + vactive) >> 1; + else + vsample = (vtotal + vblank_end) >> 1; + + /* + * Wait for the border to be displayed + */ + while (intel_uncore_read(uncore, pipe_dsl_reg) >= vactive) + ; + while ((dsl = intel_uncore_read(uncore, pipe_dsl_reg)) <= + vsample) + ; + /* + * Watch ST00 for an entire scanline + */ + detect = 0; + count = 0; + do { + count++; + /* Read the ST00 VGA status register */ + st00 = intel_uncore_read8(uncore, _VGA_MSR_WRITE); + if (st00 & (1 << 4)) + detect++; + } while ((intel_uncore_read(uncore, pipe_dsl_reg) == dsl)); + + /* restore vblank if necessary */ + if (restore_vblank) + intel_uncore_write(uncore, vblank_reg, vblank); + /* + * If more than 3/4 of the scanline detected a monitor, + * then it is assumed to be present. This works even on i830, + * where there isn't any way to force the border color across + * the screen + */ + status = detect * 4 > count * 3 ? + connector_status_connected : + connector_status_disconnected; + } + + /* Restore previous settings */ + intel_uncore_write(uncore, bclrpat_reg, save_bclrpat); + + return status; +} + +static int intel_spurious_crt_detect_dmi_callback(const struct dmi_system_id *id) +{ + DRM_DEBUG_DRIVER("Skipping CRT detection for %s\n", id->ident); + return 1; +} + +static const struct dmi_system_id intel_spurious_crt_detect[] = { + { + .callback = intel_spurious_crt_detect_dmi_callback, + .ident = "ACER ZGB", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ACER"), + DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"), + }, + }, + { + .callback = intel_spurious_crt_detect_dmi_callback, + .ident = "Intel DZ77BH-55K", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"), + DMI_MATCH(DMI_BOARD_NAME, "DZ77BH-55K"), + }, + }, + { } +}; + +static int +intel_crt_detect(struct drm_connector *connector, + struct drm_modeset_acquire_ctx *ctx, + bool force) +{ + struct drm_i915_private *dev_priv = to_i915(connector->dev); + struct intel_crt *crt = intel_attached_crt(connector); + struct intel_encoder *intel_encoder = &crt->base; + intel_wakeref_t wakeref; + int status, ret; + struct intel_load_detect_pipe tmp; + + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n", + connector->base.id, connector->name, + force); + + if (i915_modparams.load_detect_test) { + wakeref = intel_display_power_get(dev_priv, + intel_encoder->power_domain); + goto load_detect; + } + + /* Skip machines without VGA that falsely report hotplug events */ + if (dmi_check_system(intel_spurious_crt_detect)) + return connector_status_disconnected; + + wakeref = intel_display_power_get(dev_priv, + intel_encoder->power_domain); + + if (I915_HAS_HOTPLUG(dev_priv)) { + /* We can not rely on the HPD pin always being correctly wired + * up, for example many KVM do not pass it through, and so + * only trust an assertion that the monitor is connected. + */ + if (intel_crt_detect_hotplug(connector)) { + DRM_DEBUG_KMS("CRT detected via hotplug\n"); + status = connector_status_connected; + goto out; + } else + DRM_DEBUG_KMS("CRT not detected via hotplug\n"); + } + + if (intel_crt_detect_ddc(connector)) { + status = connector_status_connected; + goto out; + } + + /* Load detection is broken on HPD capable machines. Whoever wants a + * broken monitor (without edid) to work behind a broken kvm (that fails + * to have the right resistors for HP detection) needs to fix this up. + * For now just bail out. */ + if (I915_HAS_HOTPLUG(dev_priv)) { + status = connector_status_disconnected; + goto out; + } + +load_detect: + if (!force) { + status = connector->status; + goto out; + } + + /* for pre-945g platforms use load detect */ + ret = intel_get_load_detect_pipe(connector, NULL, &tmp, ctx); + if (ret > 0) { + if (intel_crt_detect_ddc(connector)) + status = connector_status_connected; + else if (INTEL_GEN(dev_priv) < 4) + status = intel_crt_load_detect(crt, + to_intel_crtc(connector->state->crtc)->pipe); + else if (i915_modparams.load_detect_test) + status = connector_status_disconnected; + else + status = connector_status_unknown; + intel_release_load_detect_pipe(connector, &tmp, ctx); + } else if (ret == 0) { + status = connector_status_unknown; + } else { + status = ret; + } + +out: + intel_display_power_put(dev_priv, intel_encoder->power_domain, wakeref); + return status; +} + +static int intel_crt_get_modes(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_crt *crt = intel_attached_crt(connector); + struct intel_encoder *intel_encoder = &crt->base; + intel_wakeref_t wakeref; + struct i2c_adapter *i2c; + int ret; + + wakeref = intel_display_power_get(dev_priv, + intel_encoder->power_domain); + + i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin); + ret = intel_crt_ddc_get_modes(connector, i2c); + if (ret || !IS_G4X(dev_priv)) + goto out; + + /* Try to probe digital port for output in DVI-I -> VGA mode. */ + i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPB); + ret = intel_crt_ddc_get_modes(connector, i2c); + +out: + intel_display_power_put(dev_priv, intel_encoder->power_domain, wakeref); + + return ret; +} + +void intel_crt_reset(struct drm_encoder *encoder) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->dev); + struct intel_crt *crt = intel_encoder_to_crt(to_intel_encoder(encoder)); + + if (INTEL_GEN(dev_priv) >= 5) { + u32 adpa; + + adpa = I915_READ(crt->adpa_reg); + adpa &= ~ADPA_CRT_HOTPLUG_MASK; + adpa |= ADPA_HOTPLUG_BITS; + I915_WRITE(crt->adpa_reg, adpa); + POSTING_READ(crt->adpa_reg); + + DRM_DEBUG_KMS("crt adpa set to 0x%x\n", adpa); + crt->force_hotplug_required = 1; + } + +} + +/* + * Routines for controlling stuff on the analog port + */ + +static const struct drm_connector_funcs intel_crt_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .late_register = intel_connector_register, + .early_unregister = intel_connector_unregister, + .destroy = intel_connector_destroy, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, +}; + +static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = { + .detect_ctx = intel_crt_detect, + .mode_valid = intel_crt_mode_valid, + .get_modes = intel_crt_get_modes, +}; + +static const struct drm_encoder_funcs intel_crt_enc_funcs = { + .reset = intel_crt_reset, + .destroy = intel_encoder_destroy, +}; + +void intel_crt_init(struct drm_i915_private *dev_priv) +{ + struct drm_connector *connector; + struct intel_crt *crt; + struct intel_connector *intel_connector; + i915_reg_t adpa_reg; + u32 adpa; + + if (HAS_PCH_SPLIT(dev_priv)) + adpa_reg = PCH_ADPA; + else if (IS_VALLEYVIEW(dev_priv)) + adpa_reg = VLV_ADPA; + else + adpa_reg = ADPA; + + adpa = I915_READ(adpa_reg); + if ((adpa & ADPA_DAC_ENABLE) == 0) { + /* + * On some machines (some IVB at least) CRT can be + * fused off, but there's no known fuse bit to + * indicate that. On these machine the ADPA register + * works normally, except the DAC enable bit won't + * take. So the only way to tell is attempt to enable + * it and see what happens. + */ + I915_WRITE(adpa_reg, adpa | ADPA_DAC_ENABLE | + ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); + if ((I915_READ(adpa_reg) & ADPA_DAC_ENABLE) == 0) + return; + I915_WRITE(adpa_reg, adpa); + } + + crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL); + if (!crt) + return; + + intel_connector = intel_connector_alloc(); + if (!intel_connector) { + kfree(crt); + return; + } + + connector = &intel_connector->base; + crt->connector = intel_connector; + drm_connector_init(&dev_priv->drm, &intel_connector->base, + &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA); + + drm_encoder_init(&dev_priv->drm, &crt->base.base, &intel_crt_enc_funcs, + DRM_MODE_ENCODER_DAC, "CRT"); + + intel_connector_attach_encoder(intel_connector, &crt->base); + + crt->base.type = INTEL_OUTPUT_ANALOG; + crt->base.cloneable = (1 << INTEL_OUTPUT_DVO) | (1 << INTEL_OUTPUT_HDMI); + if (IS_I830(dev_priv)) + crt->base.crtc_mask = (1 << 0); + else + crt->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); + + if (IS_GEN(dev_priv, 2)) + connector->interlace_allowed = 0; + else + connector->interlace_allowed = 1; + connector->doublescan_allowed = 0; + + crt->adpa_reg = adpa_reg; + + crt->base.power_domain = POWER_DOMAIN_PORT_CRT; + + if (I915_HAS_HOTPLUG(dev_priv) && + !dmi_check_system(intel_spurious_crt_detect)) { + crt->base.hpd_pin = HPD_CRT; + crt->base.hotplug = intel_encoder_hotplug; + } + + if (HAS_DDI(dev_priv)) { + crt->base.port = PORT_E; + crt->base.get_config = hsw_crt_get_config; + crt->base.get_hw_state = intel_ddi_get_hw_state; + crt->base.compute_config = hsw_crt_compute_config; + crt->base.pre_pll_enable = hsw_pre_pll_enable_crt; + crt->base.pre_enable = hsw_pre_enable_crt; + crt->base.enable = hsw_enable_crt; + crt->base.disable = hsw_disable_crt; + crt->base.post_disable = hsw_post_disable_crt; + } else { + if (HAS_PCH_SPLIT(dev_priv)) { + crt->base.compute_config = pch_crt_compute_config; + crt->base.disable = pch_disable_crt; + crt->base.post_disable = pch_post_disable_crt; + } else { + crt->base.compute_config = intel_crt_compute_config; + crt->base.disable = intel_disable_crt; + } + crt->base.port = PORT_NONE; + crt->base.get_config = intel_crt_get_config; + crt->base.get_hw_state = intel_crt_get_hw_state; + crt->base.enable = intel_enable_crt; + } + intel_connector->get_hw_state = intel_connector_get_hw_state; + + drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); + + if (!I915_HAS_HOTPLUG(dev_priv)) + intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT; + + /* + * Configure the automatic hotplug detection stuff + */ + crt->force_hotplug_required = 0; + + /* + * TODO: find a proper way to discover whether we need to set the the + * polarity and link reversal bits or not, instead of relying on the + * BIOS. + */ + if (HAS_PCH_LPT(dev_priv)) { + u32 fdi_config = FDI_RX_POLARITY_REVERSED_LPT | + FDI_RX_LINK_REVERSAL_OVERRIDE; + + dev_priv->fdi_rx_config = I915_READ(FDI_RX_CTL(PIPE_A)) & fdi_config; + } + + intel_crt_reset(&crt->base.base); +} |