drm/i915: add DPIO support
ValleyView puts some display related registers like the PLL controls and
dividers behind the DPIO bus. Add simple indirect register access
routines to get to those registers.
v2: move new wait_for macro to intel_drv.h (Ben)
fix DPIO_PKT double write (Ben)
add debugfs file
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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 66c90d4..e74674b 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1503,6 +1503,53 @@
return 0;
}
+static int i915_dpio_info(struct seq_file *m, void *data)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int ret;
+
+
+ if (!IS_VALLEYVIEW(dev)) {
+ seq_printf(m, "unsupported\n");
+ return 0;
+ }
+
+ ret = mutex_lock_interruptible(&dev->mode_config.mutex);
+ if (ret)
+ return ret;
+
+ seq_printf(m, "DPIO_CTL: 0x%08x\n", I915_READ(DPIO_CTL));
+
+ seq_printf(m, "DPIO_DIV_A: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_DIV_A));
+ seq_printf(m, "DPIO_DIV_B: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_DIV_B));
+
+ seq_printf(m, "DPIO_REFSFR_A: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_REFSFR_A));
+ seq_printf(m, "DPIO_REFSFR_B: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_REFSFR_B));
+
+ seq_printf(m, "DPIO_CORE_CLK_A: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_CORE_CLK_A));
+ seq_printf(m, "DPIO_CORE_CLK_B: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_CORE_CLK_B));
+
+ seq_printf(m, "DPIO_LFP_COEFF_A: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_LFP_COEFF_A));
+ seq_printf(m, "DPIO_LFP_COEFF_B: 0x%08x\n",
+ intel_dpio_read(dev_priv, _DPIO_LFP_COEFF_B));
+
+ seq_printf(m, "DPIO_FASTCLK_DISABLE: 0x%08x\n",
+ intel_dpio_read(dev_priv, DPIO_FASTCLK_DISABLE));
+
+ mutex_unlock(&dev->mode_config.mutex);
+
+ return 0;
+}
+
static int
i915_debugfs_common_open(struct inode *inode,
struct file *filp)
@@ -1845,6 +1892,7 @@
{"i915_gen6_forcewake_count", i915_gen6_forcewake_count_info, 0},
{"i915_swizzle_info", i915_swizzle_info, 0},
{"i915_ppgtt_info", i915_ppgtt_info, 0},
+ {"i915_dpio", i915_dpio_info, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)