[Intel-gfx] [PATCH v3 9/9] drm/i915/dp: [FIXME] Program vswing, pre-emphasis, test-pattern
Animesh Manna
animesh.manna at intel.com
Mon Dec 30 16:15:23 UTC 2019
This patch process phy compliance request by programming requested
vswing, pre-emphasis and test pattern.
Note: FIXME tag added as design discusion is ongoing in previous patch
series. Some temporary fix added and the patch is under-development, not for
review.
Signed-off-by: Animesh Manna <animesh.manna at intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 24 ++++++-
drivers/gpu/drm/i915/display/intel_dp.c | 74 ++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_dp.h | 2 +
drivers/gpu/drm/i915/i915_drv.h | 2 +
4 files changed, 101 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index da5266e76738..c00be1eb67d6 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14480,6 +14480,9 @@ static int intel_atomic_check(struct drm_device *dev,
int ret, i;
bool any_ms = false;
+ if (dev_priv->dp_phy_comp)
+ return 0;
+
/* Catch I915_MODE_FLAG_INHERITED */
for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
@@ -15207,10 +15210,23 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_crtc_state *new_crtc_state, *old_crtc_state;
struct intel_crtc *crtc;
+ const struct drm_connector_state *conn_state;
+ struct drm_connector *conn;
u64 put_domains[I915_MAX_PIPES] = {};
intel_wakeref_t wakeref = 0;
int i;
+ if(dev_priv->dp_phy_comp) {
+ for_each_new_connector_in_state(&state->base, conn, conn_state, i) {
+ struct intel_encoder *encoder =
+ to_intel_encoder(conn_state->best_encoder);
+ struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+
+ intel_dp_process_phy_request(intel_dp);
+ }
+ goto dp_phy_comp1;
+ }
+
intel_atomic_commit_fence_wait(state);
drm_atomic_helper_wait_for_dependencies(&state->base);
@@ -15345,6 +15361,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
if (state->modeset && intel_can_enable_sagv(state))
intel_enable_sagv(dev_priv);
+dp_phy_comp1:
drm_atomic_helper_commit_hw_done(&state->base);
if (state->modeset) {
@@ -15436,6 +15453,7 @@ static int intel_atomic_commit(struct drm_device *dev,
state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
drm_atomic_state_get(&state->base);
+ if (!dev_priv->dp_phy_comp) {
i915_sw_fence_init(&state->commit_ready,
intel_atomic_commit_ready);
@@ -15474,11 +15492,13 @@ static int intel_atomic_commit(struct drm_device *dev,
intel_runtime_pm_put(&dev_priv->runtime_pm, state->wakeref);
return ret;
}
+ }
ret = drm_atomic_helper_setup_commit(&state->base, nonblock);
if (!ret)
ret = drm_atomic_helper_swap_state(&state->base, true);
+ if (!dev_priv->dp_phy_comp) {
if (ret) {
i915_sw_fence_commit(&state->commit_ready);
@@ -15489,6 +15509,7 @@ static int intel_atomic_commit(struct drm_device *dev,
dev_priv->wm.distrust_bios_wm = false;
intel_shared_dpll_swap_state(state);
intel_atomic_track_fbs(state);
+ }
if (state->global_state_changed) {
assert_global_state_locked(dev_priv);
@@ -15505,8 +15526,9 @@ static int intel_atomic_commit(struct drm_device *dev,
drm_atomic_state_get(&state->base);
INIT_WORK(&state->base.commit_work, intel_atomic_commit_work);
-
+ if (!dev_priv->dp_phy_comp) {
i915_sw_fence_commit(&state->commit_ready);
+ }
if (nonblock && state->modeset) {
queue_work(dev_priv->modeset_wq, &state->base.commit_work);
} else if (nonblock) {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 7c3f65e5d88b..c3454053a212 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5060,9 +5060,82 @@ static inline void intel_dp_phy_pattern_update(struct intel_dp *intel_dp)
}
}
+static void
+intel_dp_autotest_phy_ddi_disable(struct intel_dp *intel_dp)
+{
+ struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+ struct drm_device *dev = intel_dig_port->base.base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ enum port port = intel_dig_port->base.port;
+ u32 ddi_buf_ctl_value, dp_tp_ctl_value, trans_ddi_func_ctl_value;
+
+ ddi_buf_ctl_value = I915_READ(DDI_BUF_CTL(port));
+ dp_tp_ctl_value = I915_READ(TGL_DP_TP_CTL(port));
+ trans_ddi_func_ctl_value = I915_READ(TRANS_DDI_FUNC_CTL(port));
+
+ ddi_buf_ctl_value &= ~(DDI_BUF_CTL_ENABLE | DDI_PORT_WIDTH_MASK);
+ dp_tp_ctl_value &= ~DP_TP_CTL_ENABLE;
+ trans_ddi_func_ctl_value &= ~(TRANS_DDI_FUNC_ENABLE |
+ DDI_PORT_WIDTH_MASK);
+
+ I915_WRITE(DDI_BUF_CTL(port), ddi_buf_ctl_value);
+ I915_WRITE(TGL_DP_TP_CTL(port), dp_tp_ctl_value);
+ I915_WRITE(TRANS_DDI_FUNC_CTL(port), trans_ddi_func_ctl_value);
+}
+
+static void
+intel_dp_autotest_phy_ddi_enable(struct intel_dp *intel_dp, uint8_t lane_cnt)
+{
+ struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+ struct drm_device *dev = intel_dig_port->base.base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ enum port port = intel_dig_port->base.port;
+ u32 ddi_buf_ctl_value, dp_tp_ctl_value, trans_ddi_func_ctl_value;
+
+ ddi_buf_ctl_value = I915_READ(DDI_BUF_CTL(port));
+ dp_tp_ctl_value = I915_READ(TGL_DP_TP_CTL(port));
+ trans_ddi_func_ctl_value = I915_READ(TRANS_DDI_FUNC_CTL(port));
+
+ ddi_buf_ctl_value |= DDI_BUF_CTL_ENABLE | DDI_PORT_WIDTH(lane_cnt);
+ dp_tp_ctl_value |= DP_TP_CTL_ENABLE;
+ trans_ddi_func_ctl_value |= TRANS_DDI_FUNC_ENABLE |
+ DDI_PORT_WIDTH(lane_cnt);
+
+ I915_WRITE(TRANS_DDI_FUNC_CTL(port), trans_ddi_func_ctl_value);
+ I915_WRITE(TGL_DP_TP_CTL(port), dp_tp_ctl_value);
+ I915_WRITE(DDI_BUF_CTL(port), ddi_buf_ctl_value);
+}
+
+void intel_dp_process_phy_request(struct intel_dp *intel_dp)
+{
+ struct drm_dp_phy_test_params *data =
+ &intel_dp->compliance.test_data.phytest;
+ u8 link_status[DP_LINK_STATUS_SIZE];
+
+ if (!intel_dp_get_link_status(intel_dp, link_status)) {
+ DRM_DEBUG_KMS("failed to get link status\n");
+ return;
+ }
+
+ /* retrieve vswing & pre-emphasis setting */
+ intel_dp_get_adjust_train(intel_dp, link_status);
+
+ intel_dp_autotest_phy_ddi_disable(intel_dp);
+
+ intel_dp_set_signal_levels(intel_dp);
+
+ intel_dp_phy_pattern_update(intel_dp);
+
+ intel_dp_autotest_phy_ddi_enable(intel_dp, data->num_lanes);
+
+ drm_dp_set_phy_test_pattern(&intel_dp->aux, data,
+ link_status[DP_DPCD_REV]);
+}
+
static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
{
u8 test_result = DP_TEST_NAK;
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
test_result = intel_dp_prepare_phytest(intel_dp);
if (test_result != DP_TEST_ACK)
@@ -5070,6 +5143,7 @@ static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
/* Set test active flag here so userspace doesn't interrupt things */
intel_dp->compliance.test_active = 1;
+ dev_priv->dp_phy_comp = true;
return test_result;
}
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 83eadc87af26..65e4a01a4199 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -121,6 +121,8 @@ void intel_dp_hdr_metadata_enable(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state);
bool intel_digital_port_connected(struct intel_encoder *encoder);
+void intel_dp_process_phy_request(struct intel_dp *intel_dp);
+
static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
{
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b7f122dccdca..b5839db97c1f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1283,6 +1283,8 @@ struct drm_i915_private {
I915_SELFTEST_DECLARE(struct i915_selftest_stash selftest;)
+ bool dp_phy_comp;
+
/*
* NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
* will be rejected. Instead look for a better place.
--
2.24.0
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