diff options
| author | Imre Deak <imre.deak@intel.com> | 2025-05-09 21:03:39 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2025-05-12 15:22:53 +0300 |
| commit | f77d8675c1adfb7bad559c1183161db5e39e4a4d (patch) | |
| tree | 9c371094a656d4713c9034bc4d47aa650970c1a2 /drivers/gpu | |
| parent | drm/i915: Add support for forcing the link bpp on a connector (diff) | |
| download | linux-f77d8675c1adfb7bad559c1183161db5e39e4a4d.tar.gz linux-f77d8675c1adfb7bad559c1183161db5e39e4a4d.zip | |
drm/i915/dp_mst: Enable fractional link bpps on MST if the bpp is forced
Enable using a fractional (compressed) link bpp on MST links, if this is
supported and the link bpp is forced. Fractional link bpps will be
enabled by default as a follow-up change after testing this
functionality within a set of commonly used MST monitors and docks/hubs
which support it.
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/20250509180340.554867-13-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 |
3 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 3021395dead2..91a34d474463 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2103,7 +2103,7 @@ static int dsc_src_max_compressed_bpp(struct intel_dp *intel_dp) /* * Note: for pre-13 display you still need to check the validity of each step. */ -static int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector) +int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector) { struct intel_display *display = to_intel_display(connector); u8 incr = drm_dp_dsc_sink_bpp_incr(connector->dp.dsc_dpcd); @@ -2111,6 +2111,10 @@ static int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector) if (DISPLAY_VER(display) < 14 || !incr) return fxp_q4_from_int(1); + if (connector->mst.dp && + !connector->link.force_bpp_x16 && !connector->mst.dp->force_dsc_fractional_bpp_en) + return fxp_q4_from_int(1); + /* fxp q4 */ return fxp_q4_from_int(1) / incr; } diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h index 0b8a9b939070..eff3414c05db 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.h +++ b/drivers/gpu/drm/i915/display/intel_dp.h @@ -212,4 +212,6 @@ int intel_dp_dsc_min_src_compressed_bpp(void); int intel_dp_compute_min_hblank(struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state); +int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector); + #endif /* __INTEL_DP_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 13b2bd3ec860..57602606acd5 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -499,7 +499,7 @@ static int mst_stream_dsc_compute_link_config(struct intel_dp *intel_dp, "DSC Sink supported compressed min bpp " FXP_Q4_FMT " compressed max bpp " FXP_Q4_FMT "\n", FXP_Q4_ARGS(min_compressed_bpp_x16), FXP_Q4_ARGS(max_compressed_bpp_x16)); - bpp_step_x16 = fxp_q4_from_int(1); + bpp_step_x16 = intel_dp_dsc_bpp_step_x16(connector); max_compressed_bpp_x16 = min(max_compressed_bpp_x16, fxp_q4_from_int(crtc_state->pipe_bpp) - bpp_step_x16); |