drm/i915: Wire up CRC support for gen3/4

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index d7ee350fc6a38abeb2f177ab149e227b1cdb9d48..e3f09801b64dd22b76520a3bfc04798df58a3e59 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1947,6 +1947,44 @@ static int display_crc_ctl_open(struct inode *inode, struct file *file)
        return single_open(file, display_crc_ctl_show, dev);
 }
 
+static int i9xx_pipe_crc_ctl_reg(struct drm_device *dev,
+                                enum intel_pipe_crc_source source,
+                                uint32_t *val)
+{
+       switch (source) {
+       case INTEL_PIPE_CRC_SOURCE_PIPE:
+               *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PIPE_I9XX;
+               break;
+       case INTEL_PIPE_CRC_SOURCE_TV:
+               if (!SUPPORTS_TV(dev))
+                       return -EINVAL;
+               *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_TV_PRE;
+               break;
+       case INTEL_PIPE_CRC_SOURCE_DP_B:
+               if (!IS_G4X(dev))
+                       return -EINVAL;
+               *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_B_G4X;
+               break;
+       case INTEL_PIPE_CRC_SOURCE_DP_C:
+               if (!IS_G4X(dev))
+                       return -EINVAL;
+               *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_C_G4X;
+               break;
+       case INTEL_PIPE_CRC_SOURCE_DP_D:
+               if (!IS_G4X(dev))
+                       return -EINVAL;
+               *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_D_G4X;
+               break;
+       case INTEL_PIPE_CRC_SOURCE_NONE:
+               *val = 0;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int ilk_pipe_crc_ctl_reg(enum intel_pipe_crc_source source,
                                uint32_t *val)
 {
@@ -2001,7 +2039,7 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
        u32 val;
        int ret;
 
-       if (!(INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev)))
+       if (!(INTEL_INFO(dev)->gen >= 3 && !IS_VALLEYVIEW(dev)))
                return -ENODEV;
 
        if (pipe_crc->source == source)
@@ -2011,7 +2049,9 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
        if (pipe_crc->source && source)
                return -EINVAL;
 
-       if (IS_GEN5(dev) || IS_GEN6(dev))
+       if (INTEL_INFO(dev)->gen < 5)
+               ret = i9xx_pipe_crc_ctl_reg(dev, source, &val);
+       else if (IS_GEN5(dev) || IS_GEN6(dev))
                ret = ilk_pipe_crc_ctl_reg(source, &val);
        else
                ret = ivb_pipe_crc_ctl_reg(source, &val);