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[05/41] drm/i915: Wire up gen2 CRC support

Message ID 1407203723-24877-6-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Aug. 5, 2014, 1:54 a.m. UTC 
From: Daniel Vetter <daniel.vetter@ffwll.ch>

Really simple, and we don't even have working frame numbers.

v2: Actually enable it ...

v3: Review from Ville:
- Unconditionally enable the border in the CRC checksum for
  consistency with gen3+.
- Handle the "none" source to be able to disable the CRC machinery
  again.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 52f843f6ccbd73497c8e9acd9299ebf216d738be)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c |   23 +++++++++++++++++++++--
 drivers/gpu/drm/i915/i915_reg.h     |    1 +
 2 files changed, 22 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e3f0980..9a4f168 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1947,6 +1947,23 @@  static int display_crc_ctl_open(struct inode *inode, struct file *file)
 	return single_open(file, display_crc_ctl_show, dev);
 }
 
+static int i8xx_pipe_crc_ctl_reg(enum intel_pipe_crc_source source,
+				 uint32_t *val)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_INCLUDE_BORDER_I8XX;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int i9xx_pipe_crc_ctl_reg(struct drm_device *dev,
 				 enum intel_pipe_crc_source source,
 				 uint32_t *val)
@@ -2039,7 +2056,7 @@  static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
 	u32 val;
 	int ret;
 
-	if (!(INTEL_INFO(dev)->gen >= 3 && !IS_VALLEYVIEW(dev)))
+	if (IS_VALLEYVIEW(dev))
 		return -ENODEV;
 
 	if (pipe_crc->source == source)
@@ -2049,7 +2066,9 @@  static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
 	if (pipe_crc->source && source)
 		return -EINVAL;
 
-	if (INTEL_INFO(dev)->gen < 5)
+	if (IS_GEN2(dev))
+		ret = i8xx_pipe_crc_ctl_reg(source, &val);
+	else 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);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 2660252..db6524c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1877,6 +1877,7 @@ 
 #define   PIPE_CRC_SOURCE_DP_B_G4X	(6 << 28)
 #define   PIPE_CRC_SOURCE_DP_C_G4X	(7 << 28)
 /* gen2 doesn't have source selection bits */
+#define   PIPE_CRC_INCLUDE_BORDER_I8XX	(1 << 30)
 
 #define _PIPE_CRC_RES_1_A_IVB		0x60064
 #define _PIPE_CRC_RES_2_A_IVB		0x60068