[PATCH 5/5] drm/i915: add HAS_LP_PCH check

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

We have 2 possible LPT PCHs: the normal version, which contains the
pixel path (FDI, transcoders, VGA, etc), and the LP version, which
comes with ULT machines and doesn't contain the pixel path. Both
models return true for HAS_PCH_LPT.

We already have a few places where we explicitly check for LPT-LP, so
add a HAS_LP_PCH check to simplify the code.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h      | 2 ++
 drivers/gpu/drm/i915/intel_display.c | 9 +++------
 drivers/gpu/drm/i915/intel_pm.c      | 4 ++--
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2885265..262c3d4 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1578,6 +1578,8 @@ struct drm_i915_file_private {
 #define HAS_PCH_IBX(dev) (INTEL_PCH_TYPE(dev) == PCH_IBX)
 #define HAS_PCH_NOP(dev) (INTEL_PCH_TYPE(dev) == PCH_NOP)
 #define HAS_PCH_SPLIT(dev) (INTEL_PCH_TYPE(dev) != PCH_NONE)
+#define HAS_LP_PCH(dev_priv) ((dev_priv)->pch_id == \
+				INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
 
 #define HAS_FORCE_WAKE(dev) (INTEL_INFO(dev)->has_force_wake)
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c35a613..1d3c805 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5274,8 +5274,7 @@ static void lpt_enable_clkout_dp(struct drm_device *dev, bool with_spread,
 
 	if (WARN(with_fdi && !with_spread, "FDI requires downspread\n"))
 		with_spread = true;
-	if (WARN(dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE &&
-		 with_fdi, "LP PCH doesn't have FDI\n"))
+	if (WARN(HAS_LP_PCH(dev_priv) && with_fdi, "LP PCH doesn't have FDI\n"))
 		with_fdi = false;
 
 	mutex_lock(&dev_priv->dpio_lock);
@@ -5298,8 +5297,7 @@ static void lpt_enable_clkout_dp(struct drm_device *dev, bool with_spread,
 		}
 	}
 
-	reg = (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) ?
-	       SBI_GEN0 : SBI_DBUFF0;
+	reg = HAS_LP_PCH(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
 	tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
 	tmp |= SBI_GEN0_CFG_BUFFENABLE_DISABLE;
 	intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
@@ -5315,8 +5313,7 @@ static void lpt_disable_clkout_dp(struct drm_device *dev)
 
 	mutex_lock(&dev_priv->dpio_lock);
 
-	reg = (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) ?
-	       SBI_GEN0 : SBI_DBUFF0;
+	reg = HAS_LP_PCH(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
 	tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
 	tmp &= ~SBI_GEN0_CFG_BUFFENABLE_DISABLE;
 	intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 43031ec..7643b16 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4650,7 +4650,7 @@ static void lpt_init_clock_gating(struct drm_device *dev)
 	 * TODO: this bit should only be enabled when really needed, then
 	 * disabled when not needed anymore in order to save power.
 	 */
-	if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
+	if (HAS_LP_PCH(dev_priv))
 		I915_WRITE(SOUTH_DSPCLK_GATE_D,
 			   I915_READ(SOUTH_DSPCLK_GATE_D) |
 			   PCH_LP_PARTITION_LEVEL_DISABLE);
@@ -4665,7 +4665,7 @@ static void lpt_suspend_hw(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
+	if (HAS_LP_PCH(dev_priv)) {
 		uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
 
 		val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
-- 
1.8.1.2