From 40ace64b1ece1b8a29f86e6e2bc6fb91f7f0e537 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Mon, 5 Feb 2018 19:31:38 +0200 Subject: [PATCH] drm/i915: have virtual PCH detection return a PCH id Simplify intel_virt_detect_pch() by making it return a PCH id rather than returning the PCH type and setting PCH id for some PCHs. Map the PCH id to PCH type using the shared routine. This gives us sanity check on the supported combinations also in the virtualized setting. Reviewed-by: Rodrigo Vivi Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/197cf635261a1c628371ffaaee90e8647493af4d.1517851783.git.jani.nikula@intel.com --- drivers/gpu/drm/i915/i915_drv.c | 66 +++++++++++++++++---------------- 1 file changed, 35 insertions(+), 31 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 786486a53dce..9380c9f69b0f 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -202,9 +202,10 @@ static bool intel_is_virt_pch(unsigned short id, sdevice == PCI_SUBDEVICE_ID_QEMU)); } -static enum intel_pch intel_virt_detect_pch(struct drm_i915_private *dev_priv) +static unsigned short +intel_virt_detect_pch(const struct drm_i915_private *dev_priv) { - enum intel_pch ret = PCH_NOP; + unsigned short id = 0; /* * In a virtualized passthrough environment we can be in a @@ -213,28 +214,25 @@ static enum intel_pch intel_virt_detect_pch(struct drm_i915_private *dev_priv) * make an educated guess as to which PCH is really there. */ - if (IS_GEN5(dev_priv)) { - ret = PCH_IBX; - DRM_DEBUG_KMS("Assuming Ibex Peak PCH\n"); - } else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv)) { - ret = PCH_CPT; - DRM_DEBUG_KMS("Assuming CougarPoint PCH\n"); - } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) { - ret = PCH_LPT; - if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv)) - dev_priv->pch_id = INTEL_PCH_LPT_LP_DEVICE_ID_TYPE; - else - dev_priv->pch_id = INTEL_PCH_LPT_DEVICE_ID_TYPE; - DRM_DEBUG_KMS("Assuming LynxPoint PCH\n"); - } else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) { - ret = PCH_SPT; - DRM_DEBUG_KMS("Assuming SunrisePoint PCH\n"); - } else if (IS_COFFEELAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) { - ret = PCH_CNP; - DRM_DEBUG_KMS("Assuming CannonPoint PCH\n"); - } + if (IS_GEN5(dev_priv)) + id = INTEL_PCH_IBX_DEVICE_ID_TYPE; + else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv)) + id = INTEL_PCH_CPT_DEVICE_ID_TYPE; + else if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv)) + id = INTEL_PCH_LPT_LP_DEVICE_ID_TYPE; + else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) + id = INTEL_PCH_LPT_DEVICE_ID_TYPE; + else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) + id = INTEL_PCH_SPT_DEVICE_ID_TYPE; + else if (IS_COFFEELAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) + id = INTEL_PCH_CNP_DEVICE_ID_TYPE; + + if (id) + DRM_DEBUG_KMS("Assuming PCH ID %04x\n", id); + else + DRM_DEBUG_KMS("Assuming no PCH\n"); - return ret; + return id; } static void intel_detect_pch(struct drm_i915_private *dev_priv) @@ -269,19 +267,25 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv) id = pch->device & INTEL_PCH_DEVICE_ID_MASK; - dev_priv->pch_id = id; - pch_type = intel_pch_type(dev_priv, id); if (pch_type != PCH_NONE) { dev_priv->pch_type = pch_type; + dev_priv->pch_id = id; + break; } else if (intel_is_virt_pch(id, pch->subsystem_vendor, - pch->subsystem_device)) { - dev_priv->pch_type = intel_virt_detect_pch(dev_priv); - } else { - continue; + pch->subsystem_device)) { + id = intel_virt_detect_pch(dev_priv); + if (id) { + pch_type = intel_pch_type(dev_priv, id); + if (WARN_ON(pch_type == PCH_NONE)) + pch_type = PCH_NOP; + } else { + pch_type = PCH_NOP; + } + dev_priv->pch_type = pch_type; + dev_priv->pch_id = id; + break; } - - break; } if (!pch) DRM_DEBUG_KMS("No PCH found.\n"); -- 2.30.2