From c9a1c4cded955176479a28556f546d3d015aee91 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 16 Nov 2010 10:58:37 +0000 Subject: drm/i915/crt: Introduce struct intel_crt We will use this structure in future patches to store CRT specific information on the encoder. Split out and tweaked from a patch by Keith Packard. Signed-off-by: Keith Packard Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/intel_crt.c | 64 +++++++++++++++++++++++----------------- 1 file changed, 37 insertions(+), 27 deletions(-) (limited to 'drivers/gpu/drm/i915/intel_crt.c') diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index c55c77043357..e38bc6769180 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -34,6 +34,16 @@ #include "i915_drm.h" #include "i915_drv.h" +struct intel_crt { + struct intel_encoder base; +}; + +static struct intel_crt *intel_attached_crt(struct drm_connector *connector) +{ + return container_of(intel_attached_encoder(connector), + struct intel_crt, base); +} + static void intel_crt_dpms(struct drm_encoder *encoder, int mode) { struct drm_device *dev = encoder->dev; @@ -277,13 +287,12 @@ static bool intel_crt_ddc_probe(struct drm_i915_private *dev_priv, int ddc_bus) return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 1) == 1; } -static bool intel_crt_detect_ddc(struct drm_encoder *encoder) +static bool intel_crt_detect_ddc(struct intel_crt *crt) { - struct intel_encoder *intel_encoder = to_intel_encoder(encoder); - struct drm_i915_private *dev_priv = encoder->dev->dev_private; + struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private; /* CRT should always be at 0, but check anyway */ - if (intel_encoder->type != INTEL_OUTPUT_ANALOG) + if (crt->base.type != INTEL_OUTPUT_ANALOG) return false; if (intel_crt_ddc_probe(dev_priv, dev_priv->crt_ddc_pin)) { @@ -291,7 +300,7 @@ static bool intel_crt_detect_ddc(struct drm_encoder *encoder) return true; } - if (intel_ddc_probe(intel_encoder, dev_priv->crt_ddc_pin)) { + if (intel_ddc_probe(&crt->base, dev_priv->crt_ddc_pin)) { DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n"); return true; } @@ -300,9 +309,9 @@ static bool intel_crt_detect_ddc(struct drm_encoder *encoder) } static enum drm_connector_status -intel_crt_load_detect(struct drm_crtc *crtc, struct intel_encoder *intel_encoder) +intel_crt_load_detect(struct drm_crtc *crtc, struct intel_crt *crt) { - struct drm_encoder *encoder = &intel_encoder->base; + struct drm_encoder *encoder = &crt->base.base; struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); @@ -434,7 +443,7 @@ static enum drm_connector_status intel_crt_detect(struct drm_connector *connector, bool force) { struct drm_device *dev = connector->dev; - struct intel_encoder *encoder = intel_attached_encoder(connector); + struct intel_crt *crt = intel_attached_crt(connector); struct drm_crtc *crtc; int dpms_mode; enum drm_connector_status status; @@ -447,24 +456,25 @@ intel_crt_detect(struct drm_connector *connector, bool force) return connector_status_disconnected; } - if (intel_crt_detect_ddc(&encoder->base)) + if (intel_crt_detect_ddc(crt)) return connector_status_connected; if (!force) return connector->status; /* for pre-945g platforms use load detect */ - if (encoder->base.crtc && encoder->base.crtc->enabled) { - status = intel_crt_load_detect(encoder->base.crtc, encoder); + crtc = crt->base.base.crtc; + if (crtc && crtc->enabled) { + status = intel_crt_load_detect(crtc, crt); } else { - crtc = intel_get_load_detect_pipe(encoder, connector, + crtc = intel_get_load_detect_pipe(&crt->base, connector, NULL, &dpms_mode); if (crtc) { - if (intel_crt_detect_ddc(&encoder->base)) + if (intel_crt_detect_ddc(crt)) status = connector_status_connected; else - status = intel_crt_load_detect(crtc, encoder); - intel_release_load_detect_pipe(encoder, + status = intel_crt_load_detect(crtc, crt); + intel_release_load_detect_pipe(&crt->base, connector, dpms_mode); } else status = connector_status_unknown; @@ -536,17 +546,17 @@ static const struct drm_encoder_funcs intel_crt_enc_funcs = { void intel_crt_init(struct drm_device *dev) { struct drm_connector *connector; - struct intel_encoder *intel_encoder; + struct intel_crt *crt; struct intel_connector *intel_connector; struct drm_i915_private *dev_priv = dev->dev_private; - intel_encoder = kzalloc(sizeof(struct intel_encoder), GFP_KERNEL); - if (!intel_encoder) + crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL); + if (!crt) return; intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); if (!intel_connector) { - kfree(intel_encoder); + kfree(crt); return; } @@ -554,20 +564,20 @@ void intel_crt_init(struct drm_device *dev) drm_connector_init(dev, &intel_connector->base, &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA); - drm_encoder_init(dev, &intel_encoder->base, &intel_crt_enc_funcs, + drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC); - intel_connector_attach_encoder(intel_connector, intel_encoder); + intel_connector_attach_encoder(intel_connector, &crt->base); - intel_encoder->type = INTEL_OUTPUT_ANALOG; - intel_encoder->clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT) | - (1 << INTEL_ANALOG_CLONE_BIT) | - (1 << INTEL_SDVO_LVDS_CLONE_BIT); - intel_encoder->crtc_mask = (1 << 0) | (1 << 1); + crt->base.type = INTEL_OUTPUT_ANALOG; + crt->base.clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT | + 1 << INTEL_ANALOG_CLONE_BIT | + 1 << INTEL_SDVO_LVDS_CLONE_BIT); + crt->base.crtc_mask = (1 << 0) | (1 << 1); connector->interlace_allowed = 1; connector->doublescan_allowed = 0; - drm_encoder_helper_add(&intel_encoder->base, &intel_crt_helper_funcs); + drm_encoder_helper_add(&crt->base.base, &intel_crt_helper_funcs); drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); drm_sysfs_connector_add(connector); -- cgit v1.2.3 From e7dbb2f2f8ac843ab5e4d6a8e9a71d16089d324b Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 16 Nov 2010 16:03:53 +0800 Subject: drm/i915: Take advantage of auto-polling CRT hotplug detection on PCH hardware Both IBX and CPT have an automatic hotplug detection mode which appears to work reliably enough that we can dispense with the manual force hotplug trigger stuff. This means that hotplug detection is as simple as reading the current hotplug register values. The first time the hotplug detection is activated, the code synchronously waits for a hotplug sequence in case the hardware hasn't bothered to do a detection cycle since being initialized. Signed-off-by: Keith Packard Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/intel_crt.c | 95 ++++++++++++++++++++++++---------------- 1 file changed, 57 insertions(+), 38 deletions(-) (limited to 'drivers/gpu/drm/i915/intel_crt.c') diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index e38bc6769180..8df574316063 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -34,8 +34,17 @@ #include "i915_drm.h" #include "i915_drv.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; + bool force_hotplug_required; }; static struct intel_crt *intel_attached_crt(struct drm_connector *connector) @@ -139,7 +148,7 @@ static void intel_crt_mode_set(struct drm_encoder *encoder, dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); } - adpa = 0; + adpa = ADPA_HOTPLUG_BITS; if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) adpa |= ADPA_HSYNC_ACTIVE_HIGH; if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) @@ -167,53 +176,44 @@ static void intel_crt_mode_set(struct drm_encoder *encoder, 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 = dev->dev_private; - u32 adpa, temp; + u32 adpa; bool ret; - bool turn_off_dac = false; - temp = adpa = I915_READ(PCH_ADPA); + /* The first time through, trigger an explicit detection cycle */ + if (crt->force_hotplug_required) { + bool turn_off_dac = HAS_PCH_SPLIT(dev); + u32 save_adpa; - if (HAS_PCH_SPLIT(dev)) - turn_off_dac = true; - - adpa &= ~ADPA_CRT_HOTPLUG_MASK; - if (turn_off_dac) - adpa &= ~ADPA_DAC_ENABLE; - - /* disable HPD first */ - I915_WRITE(PCH_ADPA, adpa); - (void)I915_READ(PCH_ADPA); - - adpa |= (ADPA_CRT_HOTPLUG_PERIOD_128 | - ADPA_CRT_HOTPLUG_WARMUP_10MS | - ADPA_CRT_HOTPLUG_SAMPLE_4S | - ADPA_CRT_HOTPLUG_VOLTAGE_50 | /* default */ - ADPA_CRT_HOTPLUG_VOLREF_325MV | - ADPA_CRT_HOTPLUG_ENABLE | - ADPA_CRT_HOTPLUG_FORCE_TRIGGER); - - DRM_DEBUG_KMS("pch crt adpa 0x%x", adpa); - I915_WRITE(PCH_ADPA, adpa); - - if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, - 1000)) - DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); - - if (turn_off_dac) { - /* Make sure hotplug is enabled */ - I915_WRITE(PCH_ADPA, temp | ADPA_CRT_HOTPLUG_ENABLE); - (void)I915_READ(PCH_ADPA); + crt->force_hotplug_required = 0; + + save_adpa = adpa = I915_READ(PCH_ADPA); + 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(PCH_ADPA, adpa); + + if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, + 1000)) + DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); + + if (turn_off_dac) { + I915_WRITE(PCH_ADPA, save_adpa); + POSTING_READ(PCH_ADPA); + } } /* Check the status to see if both blue and green are on now */ adpa = I915_READ(PCH_ADPA); - adpa &= ADPA_CRT_HOTPLUG_MONITOR_MASK; - if ((adpa == ADPA_CRT_HOTPLUG_MONITOR_COLOR) || - (adpa == ADPA_CRT_HOTPLUG_MONITOR_MONO)) + 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; } @@ -452,8 +452,10 @@ intel_crt_detect(struct drm_connector *connector, bool force) if (intel_crt_detect_hotplug(connector)) { DRM_DEBUG_KMS("CRT detected via hotplug\n"); return connector_status_connected; - } else + } else { + DRM_DEBUG_KMS("CRT not detected via hotplug\n"); return connector_status_disconnected; + } } if (intel_crt_detect_ddc(crt)) @@ -587,5 +589,22 @@ void intel_crt_init(struct drm_device *dev) else connector->polled = DRM_CONNECTOR_POLL_CONNECT; + /* + * Configure the automatic hotplug detection stuff + */ + crt->force_hotplug_required = 0; + if (HAS_PCH_SPLIT(dev)) { + u32 adpa; + + adpa = I915_READ(PCH_ADPA); + adpa &= ~ADPA_CRT_HOTPLUG_MASK; + adpa |= ADPA_HOTPLUG_BITS; + I915_WRITE(PCH_ADPA, adpa); + POSTING_READ(PCH_ADPA); + + DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa); + crt->force_hotplug_required = 1; + } + dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS; } -- cgit v1.2.3