[PATCH 35/81] drm/i915/dp: implement get_hw_state

Daniel Vetter
2012-07-11T15:35:55Z

Also add some macros to make the pipe computation a bit easier.

v2: I've mixed up the CPT and !CPT PORT_TO_PIPE macro variants ...

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/i915_reg.h | 2 +
drivers/gpu/drm/i915/intel_dp.c | 50 +++++++++++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ae1f1b7..5163090 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4016,6 +4016,8 @@
#define PORT_TRANS_C_SEL_CPT (2<<29)
#define PORT_TRANS_SEL_MASK (3<<29)
#define PORT_TRANS_SEL_CPT(pipe) ((pipe) << 29)
+#define PORT_TO_PIPE(val) (((val) & (1<<30)) >> 30)
+#define PORT_TO_PIPE_CPT(val) (((val) & PORT_TRANS_SEL_MASK) >> 29)

#define TRANS_DP_CTL_A 0xe0300
#define TRANS_DP_CTL_B 0xe1300
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 4cfe283..ad328ab 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1277,6 +1277,54 @@ static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
}
}

+static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
+ enum pipe *pipe)
+{
+ struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+ struct drm_device *dev = encoder->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 tmp = I915_READ(intel_dp->output_reg);
+
+ if (!(tmp & DP_PORT_EN))
+ return false;
+
+ if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) {
+ *pipe = PORT_TO_PIPE_CPT(tmp);
+ } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) {
+ *pipe = PORT_TO_PIPE(tmp);
+ } else {
+ u32 trans_sel;
+ u32 trans_dp;
+ int i;
+
+ switch (intel_dp->output_reg) {
+ case PCH_DP_B:
+ trans_sel = TRANS_DP_PORT_SEL_B;
+ break;
+ case PCH_DP_C:
+ trans_sel = TRANS_DP_PORT_SEL_C;
+ break;
+ case PCH_DP_D:
+ trans_sel = TRANS_DP_PORT_SEL_D;
+ break;
+ default:
+ return true;
+ }
+
+ for_each_pipe(i) {
+ trans_dp = I915_READ(TRANS_DP_CTL(i));
+ if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) {
+ *pipe = i;
+ return true;
+ }
+ }
+ }
+
+ DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", intel_dp->output_reg);
+
+ return true;
+}
+
static void intel_disable_dp(struct intel_encoder *encoder)
{
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
@@ -2498,6 +2546,8 @@ intel_dp_init(struct drm_device *dev, int output_reg)

intel_encoder->enable = intel_enable_dp;
intel_encoder->disable = intel_disable_dp;
+ intel_encoder->get_hw_state = intel_dp_get_hw_state;
+ intel_connector->get_hw_state = intel_connector_get_hw_state;

/* Set up the DDC bus. */
switch (output_reg) {
--
1.7.7.6