Read from DPCD receiver capability field for the DP to Wireless converter. The only supported wireless technology on DP1.3 spec is WiGig display extension. If WiGig display extension is present, then read out the
- number of wde tx on device - the number of wde txs that can be concurrently active Signed-off-by: Mika Kahola <mika.kahola at intel.com> --- drivers/gpu/drm/drm_dp_helper.c | 7 +++++++ include/drm/drm_dp_helper.h | 13 +++++++++++++ 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index f98e4be..2c91771 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -468,6 +468,13 @@ int drm_dp_bd(struct drm_dp_aux *aux, struct drm_dp_bd *bd) bd->dfp.dual_mode.tmds_clk = info[1] * 2500; bd->dfp.dual_mode.bpc = info[2] & DP_DS_VGA_MAX_BPC_MASK; bd->dfp.dual_mode.frame_seq_to_frame_pack = info[3] & FRAME_SEQ_TO_FRAME_PACK; + } else if (bd->type & DP_DS_PORT_TYPE_WIRELESS) { + bd->dfp.wireless.wireless_tech = info[1] & DP_DS_WIRELESS_TECH_MASK; + + if (bd->dfp.wireless.wireless_tech == 0x0) { + bd->dfp.wireless.number_of_wde_tx_on_device = info[2] & WIRELESS_MASK; + bd->dfp.wireless.wde_tx_concurrency_cap = (info[2]>>2) & WIRELESS_MASK; + } } } diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index adf05a1..831f944 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -230,6 +230,9 @@ # define YCBCR420_PASS_THROUGH (1<<2) # define YCBCR444_TO_YCBCR422 (1<<3) # define YCBCR444_TO_YCBCR420 (1<<4) +/* offset 3 for Wireless */ +# define DP_DS_WIRELESS_TECH_MASK 0xf +# define WIRELESS_MASK 3 /* link configuration */ #define DP_LINK_BW_SET 0x100 @@ -851,6 +854,15 @@ struct drm_dp_dual_mode { }; /* + * DP to Wireless + */ +struct drm_dp_wireless { + int wireless_tech; + int number_of_wde_tx_on_device; + int wde_tx_concurrency_cap; +}; + +/* * Branch device */ struct drm_dp_bd { @@ -862,6 +874,7 @@ struct drm_dp_bd { struct drm_dp_dvi dvi; struct drm_dp_hdmi hdmi; struct drm_dp_dual_mode dual_mode; + struct drm_dp_wireless wireless; } dfp; }; -- 1.9.1