[PATCH 42/49] drm/i915/bxt: Assign PLL for pipe

Imre Deak
2015-03-17T09:41:00Z

From: Satheeshakrishna M <satheeshakrishna.m@intel.com>

Assign PLL for pipe (dependent on port attached to the pipe)

v2:
- fix incorrect encoder vs. new_encoder check for crtc (imre)

v3:
- warn and return error if no encoder is attached (imre)

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v2)
Signed-off-by: Imre Deak <imre.deak@intel.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 21 ------------------
drivers/gpu/drm/i915/intel_display.c | 41 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 1 +
3 files changed, 42 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index fa4f8f4..0a5d71e 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -491,27 +491,6 @@ intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
return ret;
}

-static struct intel_encoder *
-intel_ddi_get_crtc_new_encoder(struct intel_crtc *crtc)
-{
- struct drm_device *dev = crtc->base.dev;
- struct intel_encoder *intel_encoder, *ret = NULL;
- int num_encoders = 0;
-
- for_each_intel_encoder(dev, intel_encoder) {
- if (intel_encoder->new_crtc == crtc) {
- ret = intel_encoder;
- num_encoders++;
- }
- }
-
- WARN(num_encoders != 1, "%d encoders on crtc for pipe %c\n", num_encoders,
- pipe_name(crtc->pipe));
-
- BUG_ON(ret == NULL);
- return ret;
-}
-
#define LC_FREQ 2700
#define LC_FREQ_2K U64_C(LC_FREQ * 2000)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3606366..411bf50 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4037,6 +4037,27 @@ void intel_put_shared_dpll(struct intel_crtc *crtc)
crtc->config->shared_dpll = DPLL_ID_PRIVATE;
}

+struct intel_encoder *
+intel_ddi_get_crtc_new_encoder(struct intel_crtc *crtc)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct intel_encoder *intel_encoder, *ret = NULL;
+ int num_encoders = 0;
+
+ for_each_intel_encoder(dev, intel_encoder) {
+ if (intel_encoder->new_crtc == crtc) {
+ ret = intel_encoder;
+ num_encoders++;
+ }
+ }
+
+ WARN(num_encoders != 1, "%d encoders on crtc for pipe %c\n", num_encoders,
+ pipe_name(crtc->pipe));
+
+ BUG_ON(ret == NULL);
+ return ret;
+}
+
struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc *crtc,
struct intel_crtc_state *crtc_state)
{
@@ -4057,6 +4078,26 @@ struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc *crtc,
goto found;
}

+ if (IS_BROXTON(dev_priv->dev)) {
+ /* PLL is attached to port in bxt */
+ struct intel_encoder *encoder;
+ struct intel_digital_port *intel_dig_port;
+
+ encoder = intel_ddi_get_crtc_new_encoder(crtc);
+ if (WARN_ON(!encoder))
+ return NULL;
+
+ intel_dig_port = enc_to_dig_port(&encoder->base);
+ /* 1:1 mapping between ports and PLLs */
+ i = (enum intel_dpll_id)intel_dig_port->port;
+ pll = &dev_priv->shared_dplls[i];
+ DRM_DEBUG_KMS("CRTC:%d using pre-allocated %s\n",
+ crtc->base.base.id, pll->name);
+ WARN_ON(pll->new_config->crtc_mask);
+
+ goto found;
+ }
+
for (i = 0; i < dev_priv->num_shared_dpll; i++) {
pll = &dev_priv->shared_dplls[i];

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 56a5cc9..097fb85 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -991,6 +991,7 @@ void assert_shared_dpll(struct drm_i915_private *dev_priv,
bool state);
#define assert_shared_dpll_enabled(d, p) assert_shared_dpll(d, p, true)
#define assert_shared_dpll_disabled(d, p) assert_shared_dpll(d, p, false)
+struct intel_encoder *intel_ddi_get_crtc_new_encoder(struct intel_crtc *crtc);
struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc *crtc,
struct intel_crtc_state *state);
void intel_put_shared_dpll(struct intel_crtc *crtc);
--
2.1.0