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drm/i915: decouple gen9 and gen10 dp signal levels. 

Let's decouple bxt, glk and cnl dp signal levels
from other DDIs to avoid confusion.

No functional change. Only a reorg to avoid messing
with currently working DP signal levels when
moving voltage swing sequences around to match spec.

v2: ddi_signal_levels is also called from other ddi
    platforms, so don't remove IS_GEN9_BC check from
    skl_ddi_set_iboos. (Ville).

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170829232230.23051-2-rodrigo.vivi@intel.com
This commit is contained in:
Rodrigo Vivi 2017-08-29 16:22:24 -07:00
parent 1b6e2fd289
commit d509af6c85
3 changed files with 23 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/gpu/drm/i915/intel_ddi.c
View File

@ -2063,23 +2063,32 @@ static uint32_t intel_ddi_dp_level(struct intel_dp *intel_dp)
return translate_signal_level(signal_levels);
}
uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
u32 bxt_signal_levels(struct intel_dp *intel_dp)
{
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
struct intel_encoder *encoder = &dport->base;
enum port port = dport->port;
u32 level = intel_ddi_dp_level(intel_dp);
if (IS_CANNONLAKE(dev_priv))
cnl_ddi_vswing_sequence(encoder, level);
else
bxt_ddi_vswing_sequence(dev_priv, level, port, encoder->type);
return 0;
}
uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
{
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
struct intel_encoder *encoder = &dport->base;
uint32_t level = intel_ddi_dp_level(intel_dp);
if (IS_GEN9_BC(dev_priv))
skl_ddi_set_iboost(encoder, level);
else if (IS_GEN9_LP(dev_priv))
bxt_ddi_vswing_sequence(dev_priv, level, port, encoder->type);
else if (IS_CANNONLAKE(dev_priv)) {
cnl_ddi_vswing_sequence(encoder, level);
/* DDI_BUF_CTL bits 27:24 are reserved on CNL */
return 0;
}
skl_ddi_set_iboost(encoder, level);
return DDI_BUF_TRANS_SELECT(level);
}

10
drivers/gpu/drm/i915/intel_dp.c
View File

@ -3506,13 +3506,11 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp)
uint32_t signal_levels, mask = 0;
uint8_t train_set = intel_dp->train_set[0];
if (HAS_DDI(dev_priv)) {
if (IS_GEN9_LP(dev_priv) || IS_CANNONLAKE(dev_priv)) {
signal_levels = bxt_signal_levels(intel_dp);
} else if (HAS_DDI(dev_priv)) {
signal_levels = ddi_signal_levels(intel_dp);
if (IS_GEN9_LP(dev_priv) || IS_CANNONLAKE(dev_priv))
signal_levels = 0;
else
mask = DDI_BUF_EMP_MASK;
mask = DDI_BUF_EMP_MASK;
} else if (IS_CHERRYVIEW(dev_priv)) {
signal_levels = chv_signal_levels(intel_dp);
} else if (IS_VALLEYVIEW(dev_priv)) {

1
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1271,6 +1271,7 @@ void intel_ddi_clock_get(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config);
void intel_ddi_set_vc_payload_alloc(const struct intel_crtc_state *crtc_state,
bool state);
u32 bxt_signal_levels(struct intel_dp *intel_dp);
uint32_t ddi_signal_levels(struct intel_dp *intel_dp);
u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder);