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drm/i915/skl: Introduce enable_requested and is_enabled in the power well code

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Just like what we do for HSW/BDW, having those variables makes it a bit
easier to parse the code.

Suggested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2015-03-06 18:50:49 +00:00 committed by Daniel Vetter
parent 4c6c03be12
commit 2a51835f61
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/i915/intel_runtime_pm.c
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@ -294,7 +294,7 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
{
uint32_t tmp, fuse_status;
uint32_t req_mask, state_mask;
bool check_fuse_status = false;
bool is_enabled, enable_requested, check_fuse_status = false;
tmp = I915_READ(HSW_PWR_WELL_DRIVER);
fuse_status = I915_READ(SKL_FUSE_STATUS);
@ -325,15 +325,17 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
}
req_mask = SKL_POWER_WELL_REQ(power_well->data);
enable_requested = tmp & req_mask;
state_mask = SKL_POWER_WELL_STATE(power_well->data);
is_enabled = tmp & state_mask;
if (enable) {
if (!(tmp & req_mask)) {
if (!enable_requested) {
I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask);
DRM_DEBUG_KMS("Enabling %s\n", power_well->name);
}
if (!(tmp & state_mask)) {
if (!is_enabled) {
if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
state_mask), 1))
DRM_ERROR("%s enable timeout\n",
@ -341,7 +343,7 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
check_fuse_status = true;
}
} else {
if (tmp & req_mask) {
if (enable_requested) {
I915_WRITE(HSW_PWR_WELL_DRIVER, tmp & ~req_mask);
POSTING_READ(HSW_PWR_WELL_DRIVER);
DRM_DEBUG_KMS("Disabling %s\n", power_well->name);