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drm/i915: Fix reason for per-chip disabling of FBC

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When running on my snb machine, recent kernels display successively:

[drm:intel_update_fbc], fbc set to per-chip default
[drm:intel_update_fbc], fbc disabled per module param

But no module param is set. This happens because the check for the
module parameter uses a variable that has been overridden inside the
"per-chip default" code.

Fix up the logic and add another reason for the FBC to the be disabled.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-06-24 16:22:02 +01:00 committed by Daniel Vetter
parent b63fb44c65
commit 8a5729a373
3 changed files with 10 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/i915/i915_debugfs.c
View file

@ -1518,6 +1518,9 @@ static int i915_fbc_status(struct seq_file *m, void *unused)
case FBC_MODULE_PARAM:
seq_printf(m, "disabled per module param (default off)");
break;
case FBC_CHIP_DEFAULT:
seq_printf(m, "disabled per chip default");
break;
default:
seq_printf(m, "unknown reason");
}

1
drivers/gpu/drm/i915/i915_drv.h
View file

@ -537,6 +537,7 @@ enum no_fbc_reason {
FBC_NOT_TILED, /* buffer not tiled */
FBC_MULTIPLE_PIPES, /* more than one pipe active */
FBC_MODULE_PARAM,
FBC_CHIP_DEFAULT, /* disabled by default on this chip */
};
enum intel_pch {

14
drivers/gpu/drm/i915/intel_pm.c
View file

@ -447,7 +447,6 @@ void intel_update_fbc(struct drm_device *dev)
struct drm_framebuffer *fb;
struct intel_framebuffer *intel_fb;
struct drm_i915_gem_object *obj;
int enable_fbc;
unsigned int max_hdisplay, max_vdisplay;
if (!i915_powersave)
@ -488,14 +487,13 @@ void intel_update_fbc(struct drm_device *dev)
intel_fb = to_intel_framebuffer(fb);
obj = intel_fb->obj;
enable_fbc = i915_enable_fbc;
if (enable_fbc < 0) {
DRM_DEBUG_KMS("fbc set to per-chip default\n");
enable_fbc = 1;
if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
enable_fbc = 0;
if (i915_enable_fbc < 0 &&
INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) {
DRM_DEBUG_KMS("disabled per chip default\n");
dev_priv->no_fbc_reason = FBC_CHIP_DEFAULT;
goto out_disable;
}
if (!enable_fbc) {
if (!i915_enable_fbc) {
DRM_DEBUG_KMS("fbc disabled per module param\n");
dev_priv->no_fbc_reason = FBC_MODULE_PARAM;
goto out_disable;