drm/i915: remove SDV support from lpt_pch_init_refclk

The machines that fall in the "is_sdv" case are some very early
pre-production steppings. This patch may break VGA output after
suspend/resume on these machines.

Even the documentation for the is_sdv cases was removed from BSpec.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 94cb0ad..46c4dff 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5177,7 +5177,6 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
        struct drm_mode_config *mode_config = &dev->mode_config;
        struct intel_encoder *encoder;
        bool has_vga = false;
-       bool is_sdv = false;
        u32 tmp;
 
        list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
@@ -5193,10 +5192,6 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
 
        mutex_lock(&dev_priv->dpio_lock);
 
-       /* XXX: Rip out SDV support once Haswell ships for real. */
-       if (IS_HASWELL(dev) && (dev->pci_device & 0xFF00) == 0x0C00)
-               is_sdv = true;
-
        tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
        tmp &= ~SBI_SSCCTL_DISABLE;
        tmp |= SBI_SSCCTL_PATHALT;
@@ -5208,36 +5203,27 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
        tmp &= ~SBI_SSCCTL_PATHALT;
        intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
 
-       if (!is_sdv) {
-               tmp = I915_READ(SOUTH_CHICKEN2);
-               tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
-               I915_WRITE(SOUTH_CHICKEN2, tmp);
+       tmp = I915_READ(SOUTH_CHICKEN2);
+       tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
+       I915_WRITE(SOUTH_CHICKEN2, tmp);
 
-               if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
-                                      FDI_MPHY_IOSFSB_RESET_STATUS, 100))
-                       DRM_ERROR("FDI mPHY reset assert timeout\n");
+       if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
+                              FDI_MPHY_IOSFSB_RESET_STATUS, 100))
+               DRM_ERROR("FDI mPHY reset assert timeout\n");
 
-               tmp = I915_READ(SOUTH_CHICKEN2);
-               tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
-               I915_WRITE(SOUTH_CHICKEN2, tmp);
+       tmp = I915_READ(SOUTH_CHICKEN2);
+       tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
+       I915_WRITE(SOUTH_CHICKEN2, tmp);
 
-               if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
-                                       FDI_MPHY_IOSFSB_RESET_STATUS) == 0,
-                                      100))
-                       DRM_ERROR("FDI mPHY reset de-assert timeout\n");
-       }
+       if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
+                               FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
+               DRM_ERROR("FDI mPHY reset de-assert timeout\n");
 
        tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
        tmp &= ~(0xFF << 24);
        tmp |= (0x12 << 24);
        intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
 
-       if (is_sdv) {
-               tmp = intel_sbi_read(dev_priv, 0x800C, SBI_MPHY);
-               tmp |= 0x7FFF;
-               intel_sbi_write(dev_priv, 0x800C, tmp, SBI_MPHY);
-       }
-
        tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
        tmp |= (1 << 11);
        intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
@@ -5246,24 +5232,6 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
        tmp |= (1 << 11);
        intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
 
-       if (is_sdv) {
-               tmp = intel_sbi_read(dev_priv, 0x2038, SBI_MPHY);
-               tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
-               intel_sbi_write(dev_priv, 0x2038, tmp, SBI_MPHY);
-
-               tmp = intel_sbi_read(dev_priv, 0x2138, SBI_MPHY);
-               tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
-               intel_sbi_write(dev_priv, 0x2138, tmp, SBI_MPHY);
-
-               tmp = intel_sbi_read(dev_priv, 0x203C, SBI_MPHY);
-               tmp |= (0x3F << 8);
-               intel_sbi_write(dev_priv, 0x203C, tmp, SBI_MPHY);
-
-               tmp = intel_sbi_read(dev_priv, 0x213C, SBI_MPHY);
-               tmp |= (0x3F << 8);
-               intel_sbi_write(dev_priv, 0x213C, tmp, SBI_MPHY);
-       }
-
        tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
        tmp |= (1 << 24) | (1 << 21) | (1 << 18);
        intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
@@ -5272,17 +5240,15 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
        tmp |= (1 << 24) | (1 << 21) | (1 << 18);
        intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
 
-       if (!is_sdv) {
-               tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
-               tmp &= ~(7 << 13);
-               tmp |= (5 << 13);
-               intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
+       tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
+       tmp &= ~(7 << 13);
+       tmp |= (5 << 13);
+       intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
 
-               tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
-               tmp &= ~(7 << 13);
-               tmp |= (5 << 13);
-               intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
-       }
+       tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
+       tmp &= ~(7 << 13);
+       tmp |= (5 << 13);
+       intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
 
        tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
        tmp &= ~0xFF;
@@ -5304,25 +5270,23 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
        tmp |= (0x1C << 16);
        intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
 
-       if (!is_sdv) {
-               tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
-               tmp |= (1 << 27);
-               intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
+       tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
+       tmp |= (1 << 27);
+       intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
 
-               tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
-               tmp |= (1 << 27);
-               intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
+       tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
+       tmp |= (1 << 27);
+       intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
 
-               tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
-               tmp &= ~(0xF << 28);
-               tmp |= (4 << 28);
-               intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
+       tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
+       tmp &= ~(0xF << 28);
+       tmp |= (4 << 28);
+       intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
 
-               tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
-               tmp &= ~(0xF << 28);
-               tmp |= (4 << 28);
-               intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
-       }
+       tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
+       tmp &= ~(0xF << 28);
+       tmp |= (4 << 28);
+       intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
 
        /* ULT uses SBI_GEN0, but ULT doesn't have VGA, so we don't care. */
        tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK);