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| author | Jani Nikula <jani.nikula@intel.com> | 2021-08-25 18:47:49 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2021-08-27 11:43:47 +0300 |
| commit | f18362cd280d1343fafc1a08df7a4ecfbad0760d (patch) | |
| tree | 9e10c02c9a523353c9b29bc048d06a6c522fdeda /drivers/gpu/drm/i915/display/intel_fdi.c | |
| parent | 0ce298258200f11e5c94067b56d45b4d76277bb2 (diff) | |
| download | lwn-f18362cd280d1343fafc1a08df7a4ecfbad0760d.tar.gz lwn-f18362cd280d1343fafc1a08df7a4ecfbad0760d.zip | |
drm/i915/fdi: move fdi bc bifurcation functions to intel_fdi.c
Move FDI related functions to intel_fdi.c. Don't bother with renaming as
we'll make the functions static shortly.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fd8afe4876f0b0762a9c69e01762a8dba31349e5.1629906431.git.jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_fdi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_fdi.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_fdi.c b/drivers/gpu/drm/i915/display/intel_fdi.c index 88a78dafd54d..f8ffd5c032ae 100644 --- a/drivers/gpu/drm/i915/display/intel_fdi.c +++ b/drivers/gpu/drm/i915/display/intel_fdi.c @@ -170,6 +170,55 @@ retry: return ret; } +static void cpt_set_fdi_bc_bifurcation(struct drm_i915_private *dev_priv, bool enable) +{ + u32 temp; + + temp = intel_de_read(dev_priv, SOUTH_CHICKEN1); + if (!!(temp & FDI_BC_BIFURCATION_SELECT) == enable) + return; + + drm_WARN_ON(&dev_priv->drm, + intel_de_read(dev_priv, FDI_RX_CTL(PIPE_B)) & + FDI_RX_ENABLE); + drm_WARN_ON(&dev_priv->drm, + intel_de_read(dev_priv, FDI_RX_CTL(PIPE_C)) & + FDI_RX_ENABLE); + + temp &= ~FDI_BC_BIFURCATION_SELECT; + if (enable) + temp |= FDI_BC_BIFURCATION_SELECT; + + drm_dbg_kms(&dev_priv->drm, "%sabling fdi C rx\n", + enable ? "en" : "dis"); + intel_de_write(dev_priv, SOUTH_CHICKEN1, temp); + intel_de_posting_read(dev_priv, SOUTH_CHICKEN1); +} + +void ivb_update_fdi_bc_bifurcation(const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + + switch (crtc->pipe) { + case PIPE_A: + break; + case PIPE_B: + if (crtc_state->fdi_lanes > 2) + cpt_set_fdi_bc_bifurcation(dev_priv, false); + else + cpt_set_fdi_bc_bifurcation(dev_priv, true); + + break; + case PIPE_C: + cpt_set_fdi_bc_bifurcation(dev_priv, true); + + break; + default: + BUG(); + } +} + void intel_fdi_normal_train(struct intel_crtc *crtc) { struct drm_device *dev = crtc->base.dev; |