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| author | Ben Skeggs <bskeggs@redhat.com> | 2017-07-19 09:49:59 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2017-07-24 05:15:24 +0300 |
| commit | 13a86519202c5d119d83640d6f781f3181205d2c (patch) | |
| tree | d7a7f35bb97adf34587a8f770e92752647268ba1 /drivers/gpu/drm/nouveau/nv50_display.c | |
| parent | 5896ec77d70d33dd38a455b0aa5f3154aeecea09 (diff) | |
| download | linux-13a86519202c5d119d83640d6f781f3181205d2c.tar.xz | |
drm/nouveau/i2c/gf119-: add support for address-only transactions
Since switching the I2C-over-AUX helpers, there have been regressions on
some display combinations due to us not having support for "address only"
transactions.
This commits enables support for them for GF119 and newer.
Earlier GPUs have been reverted to a custom I2C-over-AUX algorithm.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv50_display.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv50_display.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index e3132a2ce34d..06b9670005bb 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -3674,15 +3674,24 @@ nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe) drm_mode_connector_attach_encoder(connector, encoder); if (dcbe->type == DCB_OUTPUT_DP) { + struct nv50_disp *disp = nv50_disp(encoder->dev); struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, dcbe->i2c_index); if (aux) { - nv_encoder->i2c = &nv_connector->aux.ddc; + if (disp->disp->oclass < GF110_DISP) { + /* HW has no support for address-only + * transactions, so we're required to + * use custom I2C-over-AUX code. + */ + nv_encoder->i2c = &aux->i2c; + } else { + nv_encoder->i2c = &nv_connector->aux.ddc; + } nv_encoder->aux = aux; } /*TODO: Use DP Info Table to check for support. */ - if (nv50_disp(encoder->dev)->disp->oclass >= GF110_DISP) { + if (disp->disp->oclass >= GF110_DISP) { ret = nv50_mstm_new(nv_encoder, &nv_connector->aux, 16, nv_connector->base.base.id, &nv_encoder->dp.mstm); |