From e7968531f86983a8f199818a7ffcaa380d1b4399 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Fri, 1 Apr 2016 16:02:32 +0300 Subject: [PATCH] drm/i915/bxt: Reject DMC firmware versions with known bugs DMC version 1.06 has a known bug, where the firmware polls forever for a port PLL to lock, if the PLL was disabled when entering DC5, which locks up the machine. Version 1.07 fixes this, so make that the minimum required version on BXT. CC: Mika Kuoppala Signed-off-by: Imre Deak Reviewed-by: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/1459515767-29228-2-git-send-email-imre.deak@intel.com --- drivers/gpu/drm/i915/intel_csr.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c index 3f57cb94d9ad..d57b00ed5e5e 100644 --- a/drivers/gpu/drm/i915/intel_csr.c +++ b/drivers/gpu/drm/i915/intel_csr.c @@ -50,6 +50,7 @@ MODULE_FIRMWARE(I915_CSR_SKL); MODULE_FIRMWARE(I915_CSR_BXT); #define SKL_CSR_VERSION_REQUIRED CSR_VERSION(1, 23) +#define BXT_CSR_VERSION_REQUIRED CSR_VERSION(1, 7) #define CSR_MAX_FW_SIZE 0x2FFF #define CSR_DEFAULT_FW_OFFSET 0xFFFFFFFF @@ -281,6 +282,7 @@ static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv, uint32_t dmc_offset = CSR_DEFAULT_FW_OFFSET, readcount = 0, nbytes; uint32_t i; uint32_t *dmc_payload; + uint32_t required_min_version; if (!fw) return NULL; @@ -296,15 +298,23 @@ static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv, csr->version = css_header->version; - if ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) && - csr->version < SKL_CSR_VERSION_REQUIRED) { - DRM_INFO("Refusing to load old Skylake DMC firmware v%u.%u," + if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) { + required_min_version = SKL_CSR_VERSION_REQUIRED; + } else if (IS_BROXTON(dev_priv)) { + required_min_version = BXT_CSR_VERSION_REQUIRED; + } else { + MISSING_CASE(INTEL_REVID(dev_priv)); + required_min_version = 0; + } + + if (csr->version < required_min_version) { + DRM_INFO("Refusing to load old DMC firmware v%u.%u," " please upgrade to v%u.%u or later" " [" FIRMWARE_URL "].\n", CSR_VERSION_MAJOR(csr->version), CSR_VERSION_MINOR(csr->version), - CSR_VERSION_MAJOR(SKL_CSR_VERSION_REQUIRED), - CSR_VERSION_MINOR(SKL_CSR_VERSION_REQUIRED)); + CSR_VERSION_MAJOR(required_min_version), + CSR_VERSION_MINOR(required_min_version)); return NULL; } -- 2.20.1