From 8144ac59bdc9205c45cd8c45374967e6be90f7d8 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 28 Oct 2015 23:59:04 +0200 Subject: [PATCH] drm/i915: Use request_firmware and our own async work Two benefits: - We can use FW_LOADER_USERSPACE_FALLBACK. - We can use flush_work to synchronize with the oustanding worker, which is a notch more obvious what it does than having a special completion. The next patch will properly synchronize against the async loader in the resume and unload code. Cc: Damien Lespiau Cc: Imre Deak Cc: Sunil Kamath Signed-off-by: Daniel Vetter Signed-off-by: Animesh Manna Signed-off-by: Imre Deak Tested-by: Daniel Stone # SKL Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1446069547-24760-11-git-send-email-imre.deak@intel.com --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_csr.c | 26 +++++++++++++------------- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 80cddc5cfda3..825e8703978d 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -739,6 +739,7 @@ struct intel_uncore { #define CSR_VERSION_MINOR(version) ((version) & 0xffff) struct intel_csr { + struct work_struct work; const char *fw_path; uint32_t *dmc_payload; uint32_t dmc_fw_size; diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c index 1c0765baa795..50790725d514 100644 --- a/drivers/gpu/drm/i915/intel_csr.c +++ b/drivers/gpu/drm/i915/intel_csr.c @@ -361,11 +361,18 @@ static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv, return dmc_payload; } -static void finish_csr_load(const struct firmware *fw, void *context) +static void csr_load_work_fn(struct work_struct *work) { - struct drm_i915_private *dev_priv = context; - struct intel_csr *csr = &dev_priv->csr; + struct drm_i915_private *dev_priv; + struct intel_csr *csr; + const struct firmware *fw; + int ret; + + dev_priv = container_of(work, typeof(*dev_priv), csr.work); + csr = &dev_priv->csr; + ret = request_firmware(&fw, dev_priv->csr.fw_path, + &dev_priv->dev->pdev->dev); if (!fw) goto out; @@ -401,7 +408,8 @@ out: void intel_csr_ucode_init(struct drm_i915_private *dev_priv) { struct intel_csr *csr = &dev_priv->csr; - int ret; + + INIT_WORK(&dev_priv->csr.work, csr_load_work_fn); if (!HAS_CSR(dev_priv)) return; @@ -423,15 +431,7 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv) */ intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); - /* CSR supported for platform, load firmware */ - ret = request_firmware_nowait(THIS_MODULE, true, csr->fw_path, - &dev_priv->dev->pdev->dev, - GFP_KERNEL, dev_priv, - finish_csr_load); - - if (ret) - DRM_ERROR("Failed to load DMC firmware, disabling rpm (%d)\n", - ret); + schedule_work(&dev_priv->csr.work); } /** -- 2.20.1