From: Akash Goel Date: Thu, 26 Feb 2015 10:39:47 +0000 (+0530) Subject: drm/i915: Removed the read of RP_STATE_CAP from sysfs/debugfs functions X-Git-Tag: firefly_0821_release~176^2~1915^2~33^2~19 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bc4d91f699d8529682be34e9f61be87679982f9b;p=firefly-linux-kernel-4.4.55.git drm/i915: Removed the read of RP_STATE_CAP from sysfs/debugfs functions The frequency values(Rp0, Rp1, Rpn) reported by RP_STATE_CAP register are stored, initially by the Driver, inside the dev_priv->rps structure. Since these values are expected to remain same throughout, there is no real need to read this register, on dynamic basis, from certain debugfs/sysfs functions and the values can be instead retrieved from the dev_priv->rps structure when needed. For the i915_frequency_info debugfs interface, the frequency values from the RP_STATE_CAP register only should be used, to indicate the actual Hw state, since it is principally used for the debugging purpose. v2: Reverted the changes in i915_frequency_info function, to continue report back the frequency values, as per the actual Hw state (Chris) Signed-off-by: Akash Goel Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 843b471090f3..81e27d417130 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -4180,7 +4180,7 @@ i915_max_freq_set(void *data, u64 val) { struct drm_device *dev = data; struct drm_i915_private *dev_priv = dev->dev_private; - u32 rp_state_cap, hw_max, hw_min; + u32 hw_max, hw_min; int ret; if (INTEL_INFO(dev)->gen < 6) @@ -4197,18 +4197,10 @@ i915_max_freq_set(void *data, u64 val) /* * Turbo will still be enabled, but won't go above the set value. */ - if (IS_VALLEYVIEW(dev)) { - val = intel_freq_opcode(dev_priv, val); + val = intel_freq_opcode(dev_priv, val); - hw_max = dev_priv->rps.max_freq; - hw_min = dev_priv->rps.min_freq; - } else { - val = intel_freq_opcode(dev_priv, val); - - rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); - hw_max = dev_priv->rps.max_freq; - hw_min = (rp_state_cap >> 16) & 0xff; - } + hw_max = dev_priv->rps.max_freq; + hw_min = dev_priv->rps.min_freq; if (val < hw_min || val > hw_max || val < dev_priv->rps.min_freq_softlimit) { mutex_unlock(&dev_priv->rps.hw_lock); @@ -4255,7 +4247,7 @@ i915_min_freq_set(void *data, u64 val) { struct drm_device *dev = data; struct drm_i915_private *dev_priv = dev->dev_private; - u32 rp_state_cap, hw_max, hw_min; + u32 hw_max, hw_min; int ret; if (INTEL_INFO(dev)->gen < 6) @@ -4272,18 +4264,10 @@ i915_min_freq_set(void *data, u64 val) /* * Turbo will still be enabled, but won't go below the set value. */ - if (IS_VALLEYVIEW(dev)) { - val = intel_freq_opcode(dev_priv, val); + val = intel_freq_opcode(dev_priv, val); - hw_max = dev_priv->rps.max_freq; - hw_min = dev_priv->rps.min_freq; - } else { - val = intel_freq_opcode(dev_priv, val); - - rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); - hw_max = dev_priv->rps.max_freq; - hw_min = (rp_state_cap >> 16) & 0xff; - } + hw_max = dev_priv->rps.max_freq; + hw_min = dev_priv->rps.min_freq; if (val < hw_min || val > hw_max || val > dev_priv->rps.max_freq_softlimit) { mutex_unlock(&dev_priv->rps.hw_lock); diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index cdc9da001484..186ab95056b0 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -487,38 +487,17 @@ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr struct drm_minor *minor = dev_to_drm_minor(kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; - u32 val, rp_state_cap; - ssize_t ret; - - ret = mutex_lock_interruptible(&dev->struct_mutex); - if (ret) - return ret; - intel_runtime_pm_get(dev_priv); - rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); - intel_runtime_pm_put(dev_priv); - mutex_unlock(&dev->struct_mutex); + u32 val; - if (attr == &dev_attr_gt_RP0_freq_mhz) { - if (IS_VALLEYVIEW(dev)) - val = intel_gpu_freq(dev_priv, dev_priv->rps.rp0_freq); - else - val = intel_gpu_freq(dev_priv, - ((rp_state_cap & 0x0000ff) >> 0)); - } else if (attr == &dev_attr_gt_RP1_freq_mhz) { - if (IS_VALLEYVIEW(dev)) - val = intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq); - else - val = intel_gpu_freq(dev_priv, - ((rp_state_cap & 0x00ff00) >> 8)); - } else if (attr == &dev_attr_gt_RPn_freq_mhz) { - if (IS_VALLEYVIEW(dev)) - val = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq); - else - val = intel_gpu_freq(dev_priv, - ((rp_state_cap & 0xff0000) >> 16)); - } else { + if (attr == &dev_attr_gt_RP0_freq_mhz) + val = intel_gpu_freq(dev_priv, dev_priv->rps.rp0_freq); + else if (attr == &dev_attr_gt_RP1_freq_mhz) + val = intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq); + else if (attr == &dev_attr_gt_RPn_freq_mhz) + val = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq); + else BUG(); - } + return snprintf(buf, PAGE_SIZE, "%d\n", val); }