- 10 Nov, 2023 6 commits
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Jani Nikula authored
Centralize the conditions in a function. Reviewed-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by:
Suraj Kandpal <suraj.kandpal@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231109160722.3372379-1-jani.nikula@intel.com
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Animesh Manna authored
TRANS_DP2_CTL register is programmed to enable panel replay from source and sink is enabled through panel replay dpcd configuration address. Bspec: 1407940617 v1: Initial version. v2: - Use pr_* flags instead psr_* flags. [Jouni] - Remove intel_dp_is_edp check as edp1.5 also has panel replay. [Jouni] v3: Cover letter updated and selective fetch condition check is added before updating its bit in PSR2_MAN_TRK_CTL register. [Jouni] v4: Selective fetch related PSR2_MAN_TRK_CTL programmming dropped. [Jouni] v5: Added PSR2_MAN_TRK_CTL programming as needed for Continuous Full Frame (CFF) update. v6: Rebased on latest. Note: Initial plan is to enable panel replay in full-screen live active frame update mode. In a incremental approach panel replay will be enabled in selctive update mode if there is any gap in curent implementation. Cc: Jouni Högander <jouni.hogander@intel.com> Cc: Arun R Murthy <arun.r.murthy@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Reviewed-by:
Arun R Murthy <arun.r.murthy@intel.com> Signed-off-by:
Animesh Manna <animesh.manna@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231108072303.3414118-6-animesh.manna@intel.com
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Animesh Manna authored
Due to similarity panel replay dpcd initialization got added in psr function which is specific for edp panel. This patch enables panel replay initialization for dp connector. Cc: Jouni Högander <jouni.hogander@intel.com> Cc: Arun R Murthy <arun.r.murthy@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Reviewed-by:
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Animesh Manna authored
Modify existing PSR implementation to enable panel replay feature of DP 2.0 which is similar to PSR feature of EDP panel. There is different DPCD address to check panel capability compare to PSR and vsc sdp header is different. v1: Initial version. v2: - Set source_panel_replay_support flag under HAS_PANEL_REPLAY() condition check. [Jouni] - Code restructured around intel_panel_replay_init and renamed to intel_panel_replay_init_dpcd. [Jouni] - Remove the initial code modification around has_psr2 flag. [Jouni] - Add CAN_PANEL_REPLAY() in intel_encoder_can_psr which is used to enable in intel_psr_post_plane_update. [Jouni] v3: - Initialize both psr and panel-replay. [Jouni] - Initialize both panel replay and psr if detected. [Jouni] - Refactoring psr function by introducing _psr_compute_config(). [Jouni] - Add check for !is_edp while deriving source_panel_replay_support. [Jouni] - Enable panel replay dpcd initialization in a separate patch. [Jouni] v4: - HAS_PANEL_REPLAY() check not needed during sink capability check. [Jouni] - Set either panel replay source support or psr. [Jouni] v5: - HAS_PANEL_REPLAY() removed and use HAS_DP20() instead. [Jouni] - Move psr related code to intel_psr.c. [Jani] - Reset sink_panel_replay_support flag during disconnection. [Jani] v6: return statement restored which is removed by misatke. [Jouni] v7: cosmetic changes. [Arun] Cc: Jouni Högander <jouni.hogander@intel.com> Cc: Arun R Murthy <arun.r.murthy@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Reviewed-by:
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Jouni Högander authored
This patch is preparing adding panel replay specific dpcd init. Cc: Arun R Murthy <arun.r.murthy@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Reviewed-by:
Jouni Högander <jouni.hogander@intel.com> Signed-off-by:
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Animesh Manna authored
Add DPCD register definition for discovering, enabling and checking status of panel replay of the sink. Cc: Jouni Högander <jouni.hogander@intel.com> Cc: Arun R Murthy <arun.r.murthy@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Acked-by:
Maxime Ripard <mripard@kernel.org> Reviewed-by:
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- 08 Nov, 2023 34 commits
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Ville Syrjälä authored
Just use a simple {} to zero initialize arrays/structs instead of the hodgepodge of stuff we are using currently. Cc: Zhenyu Wang <zhenyuw@linux.intel.com> Cc: Zhi Wang <zhi.a.wang@intel.com> Signed-off-by:Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231012122442.15718-7-ville.syrjala@linux.intel.comReviewed-by:
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Ville Syrjälä authored
Perform all the intel_pre_update_crtc() stuff for all pipes first, and only then do the intel_update_crtc() vblank evasion stuff for every pipe back to back. This should make it more likely that the plane updates from multiple pipes happen on the same frame (assuming the pipes are running in sync, eg. due to bigjoiner or port sync). Signed-off-by:
Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
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Ville Syrjälä authored
Split intel_update_crtc() into two parts such that the first part performs all the non-vblank evasion preparatory stuff, and the second part just does the vblank evasion stuff. For now we just call these back to back so that there is no funcitonal change. Signed-off-by:
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Ville Syrjälä authored
Since commit 7de5b6b5 ("drm/i915: Don't flag both full modeset and fastset at the same time") intel_crtc_needs_fastset() and intel_crtc_needs_modeset() have been mutually exclusive. Drop the redundant check. Signed-off-by:
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Stanislav Lisovskiy authored
Currently we seem to be using wrong DPCD register for reading compressed bpps, reading min/max input bpc instead of compressed bpp. Fix that, so that we now apply min/max compressed bpp limitations we get from DP Spec Table 2-157 DP v2.0 and/or correspondent DPCD register DP_DSC_MAX_BITS_PER_PIXEL_LOW/HIGH. This might also allow us to get rid of an ugly compressed bpp recalculation, which we had to add to make some MST hubs usable. v2: - Fix operator precedence v3: - Added debug info about compressed bpps v4: - Don't try to intersect Sink input bpp and compressed bpps. v5: - Decrease step while looking for suitable compressed bpp to accommodate. v6: - Use helper for getting min and max compressed_bpp (Ankit) v7: - Fix checkpatch warning (Ankit) Signed-off-by:Ankit Nautiyal <ankit.k.nautiyal@intel.com> Reviewed-by:
Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231030155843.2251023-31-imre.deak@intel.com
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Imre Deak authored
After the previous patch the BW limits on the whole MST topology will be checked after computing the state for all the streams in the topology. Accordingly remove the check during the stream's encoder compute config step, to prevent failing an atomic commit due to a BW limit, if this can be resolved only by reducing the BW of other streams on the same MST link. Reviewed-by:
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Imre Deak authored
At the moment modesetting a stream CRTC will fail if the stream's BW along with the current BW of all the other streams on the same MST link is above the total BW of the MST link. Make the BW sharing more dynamic by trying to reduce the link bpp of one or more streams on the MST link in this case. When selecting a stream to reduce the BW for, take into account which link segment in the MST topology ran out of BW and which streams go through this link segment. For instance with A,B,C streams in the same MST topology A and B may share the BW of a link segment downstream of a branch device, stream C not downstream of the branch device, hence not affecting this BW. If this link segment's BW runs out one or both of stream A/B's BW will be reduced until their total BW is within limits. While reducing the link bpp for a given stream DSC may need to be enabled for it, which requires FEC on the whole MST link. Check for this condition and recompute the state for all streams taking the FEC overhead into account (on 8b/10b links). v2: - Rebase on s/min_bpp_pipes/min_bpp_reached_pipes/ change. Reviewed-by:
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Imre Deak authored
Enabling / disabling DSC decompression in the branch device downstream of the source may reset the whole branch device. To avoid this while the streams are still active, force a modeset on all CRTC/ports connected to this branch device. v2: - Check the CRTC state for each connector in the topology, instead of the CRTC being checked for a modeset requirement. (Ville) - Add DocBook for the new function. v3: - Rebased on a change not to use intel_modeset_pipes_in_mask_early(). Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v1) Signed-off-by:
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Imre Deak authored
Factor out a helper to clear the pipe update flags, used by a follow-up patch to modeset an MST topology. v2: - Move the intel_crtc_needs_modeset() check to the callers. (Ville) v3 (Ville): - Rename clear_pipe_update_flags_on_modeset_crtc() to intel_crtc_flag_modeset(). - Also set crtc_state->uapi.mode_changed in the function. - Leave out the unrelated change to use intel_modeset_pipes_in_mask_early(). Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v1) Signed-off-by:
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Imre Deak authored
Enable DSC decompression for all streams. In particular atm if a sink is connected to a last branch device that is downstream of the first branch device connected to the source, decompression is not enabled for it. Similarly it's not enabled if the sink supports this with the last branch device passing through the compressed stream to it. Enable DSC in the above cases as well. Since last branch devices may handle the decompression for multiple ports, toggling DSC needs to be refcounted, add this using the DSC AUX device as a reference. v2: - Fix refcounting, setting/clearing connector->dp.dsc_decompression_enabled always as needed. (Stan) - Make the refcounting more uniform for the SST vs. MST case. - Add state checks for connector->dp.dsc_decompression_enabled and connector crtc. - Sanitize connector DSC decompression state during HW setup. - s/use_count/ref_count/ v3: - Remove stale TODO: comment to set the actual decompression_aux. Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> Reviewed-by:
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Imre Deak authored
Enable passing through DSC streams to the sink in last branch devices. v2: - Fix the DPCD register address while setting/clearing the passthrough flag. Reviewed-by:
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Imre Deak authored
Enable DSC using the DSC AUX device stored for this purpose in the connector. For clarity add separate functions to enable/disable the decompression, since these sequences will diverge more in follow-up patches that also enable/disable DSC passthrough and on MST do the actual enabling/disabling only for the first/last user of the given AUX device. As a preparation for the latter refcounting change, also pass the atomic state to the functions. While at it set/clear only the DP_DECOMPRESSION_EN flag in the DP_DSC_ENABLE DPCD register, preserving the reserved register bits. Besides preserving the reserved register bits, the behavior stays as before, as DSC is still only enabled for the first MST stream (which a follow-up patch changes, enabling it for all streams). v2: - Add a helper function setting/clearing the decompression flag, preserving the reserved register bits. v3: - Add separate functions to enable/disable decompression and pass the atomic state to these. - Add DocBook for both functions. Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v2) Signed-off-by:
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Imre Deak authored
Enable/disable the DSC decompression in the sink/branch from the MST encoder hooks. This prepares for an upcoming patch toggling DSC for each stream as needed, but for now keeps the current behavior, as DSC is only enabled for the first MST stream. v2: - Rebased on latest drm-tip. Reviewed-by:
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Imre Deak authored
The Synaptics MST hubs expose some sink EDID modes with a reduced HBLANK period, presumedly to save BW, which the hub expands before forwarding the stream to the sink. In particular a 4k mode with a standard CVT HBLANK period is exposed with either a CVT reduced blank RBv1,v2 (80, 160 pixel) or a non-CVT 56 pixel HBLANK period. The DP standard describes the above HBLANK expansion functionality, but it requires enabling this explicitly, whereas these hubs apply the expansion transparently. In some TBT docks with such a Synaptics hub (DELL WD22TB4) the above modes will work okay until DSC decompression is enabled in the hub for the given sink, but after this the same mode will not work reliably in decompressed mode. In another TBT dock (Thinkpad 40B0) the above modes will not work in uncompressed/18bpp mode (regardless of whether DSC decompression was enabled before or not). As a workaround force enable DSC for such modes. Apply the WA when the HBLANK period is 300ns or below, matching the above tested modes with a 533.25MHz dotclock and maximum 160 HBLANK pixels. OTOH DSC for these modes will only work above a certain compressed bpp threshold which depends on the link rate, so apply this limit as well in the workaround. On platforms, pipe/port configurations where DSC is not supported, for instance on ICL where DSC/MST is still work-in-progress, limit the minimum link bpp to 24. Apply the workaround only for Synaptics hubs which support the HBLANK expansion. v2: - Apply the WA whenever the HBLANK period is 300ns or below. v3: - Clarify in the commit log the failure modes of the different docks. - Handle platforms/pipe/port configurations without DSC support. Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v1) Signed-off-by:
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Imre Deak authored
Disable the FEC ready flag in the sink during a disabling modeset. Reviewed-by:
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Imre Deak authored
As required by the DP standard wait for the sink to detect the FEC decode enabling symbol sent by the source. There is a difference between SST and MST when the source enables the FEC encoding: on SST this happens only after enabling the transcoder, whereas on MST it happens already after enabling the transcoder function (before enabling the transcoder). Wait for the detected status at the earliest spot accordingly. v2: - Wait for the FEC detected status on SST after the transcoder is enabled. Reviewed-by:
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Imre Deak authored
Rename intel_ddi_disable_fec_state() to intel_ddi_disable_fec(), for symmetry with intel_ddi_enable_fec(). Reviewed-by:
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Imre Deak authored
Add the missing DSC compression disabling step for MST streams, similarly to how this is done for SST outputs. Reviewed-by:
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Imre Deak authored
Atm the DSC PPS SDP will stay enabled after enabling and disabling DSC. This leaves an output blank after switching off DSC on it. Make sure the SDP is disabled for an uncompressed output. v2: - Disable the SDP already during output disabling. (Ville) Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Imre Deak authored
Atm the DSC PPS SDP is programmed only if the first stream is compressed and then it's programmed only for the first stream. This left all other compressed streams blank. Program the SDP for all streams. v2: - Rebase on upstream include "intel_vdsc.h" change. Reviewed-by:
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Imre Deak authored
If an MST stream is modeset, its state must be checked along all the other streams on the same MST link, for instance to resolve a BW overallocation of a non-sink MST port or to make sure that the FEC is enabled/disabled the same way for all these streams. To prepare for that this patch adds all the stream CRTCs to the atomic state and marks them for modeset similarly to tgl+ platforms. (If the state computation doesn't change the state the CRTC is switched back to fastset mode.) So far on tgl+ this was required because all streams in the topology shared the master transcoder. For older platforms this didn't apply but adding all the state is required now on all platforms based on the above. v2: - Add code and commit log comment clarifying the requirements on old/new platforms. (Stan) - Rename the function based on the new semantic. (Ville) Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Imre Deak authored
Atm, the BW allocated for an MST stream doesn't take into account the DSC control symbol (EOC) and data alignment overhead on the local (first downstream) MST link (reflected by the data M/N/TU values) and - besides the above overheads - the FEC symbol overhead on 8b/10b remote (after a downstream branch device) MST links. In addition the FEC overhead used on the local link is a fixed amount, which only applies to certain modes, but not enough for all modes; add a code comment clarifying this. Fix the above by calculating the data M/N values with the total BW overhead (not including the SSC overhead, since this isn't enabled by the source device) and using this the PBN and TU values for the local link and PBN for remote links (including SSC, since this is mandatory for links after downstream branch devices). For now keep the current fixed FEC overhead as a minimum, since this is what bspec requires for audio functionality. Calculate the effective link BW in a clearer way, applying the channel coding efficiency based on the coding type. The calculation was correct for 8b/10b, but not for 128b/132b links; this patch leaves the behavior for this unchanged, leaving the fix for a follow-up. v2: - Fix TU size programmed to the HW, making it match the payload size programmed to the payload table. v3: - Add code comment about the connection between the payload's size in the payload table and the corresponding PBN value. (Ville) - Add WARN_ON(remote_m_n.tu < dp_m_n.tu). (Ville) - Add code comment about factors not accounted for by the BW calculation in intel_dp_mst_mode_valid_ctx() (and compute config). (Ville) - Simplify calculation of PBN to remote_m_n.tu * mst_state->pbn_div. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v1) Signed-off-by:
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Imre Deak authored
A follow-up MST patch will need to specify the total BW allocation overhead, prepare for that here by passing the amount of overhead to intel_link_compute_m_n(), keeping the existing behavior. v2: - Fix passing the correct crtc_state->fec_enable param in intel_dp_mst_compute_link_config() / intel_dp_dsc_mst_compute_link_config(). Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v1) Signed-off-by:
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Imre Deak authored
A follow-up patch will add up all the overheads on a DP link, where it makes more sense to specify each overhead factor in terms of the added overhead amount vs. the reciprocal remainder (of usable BW remaining after deducting the overhead). Prepare for that here, keeping the existing behavior. Reviewed-by:
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Imre Deak authored
Enable FEC in crtc_state, as soon as it's known it will be needed by DSC. This fixes the calculation of BW allocation overhead, in case DSC is enabled by falling back to it during the encoder compute config phase (vs. enabling FEC due to DSC being enabled on other streams). v2: - Enable FEC only in intel_dp_mst_find_vcpi_slots_for_bpp(), since only by that will crtc_state->port_clock be set, which in turn is needed by intel_dp_is_uhbr(). Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v1) Signed-off-by:
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Imre Deak authored
Add helpers drivers can use to calculate the BW allocation overhead - due to SSC, FEC, DSC and data alignment on symbol cycles - and the channel coding efficiency - due to the 8b/10b, 128b/132b encoding. On 128b/132b links the FEC overhead is part of the coding efficiency, so not accounted for in the BW allocation overhead. The drivers can use these functions to calculate a ratio, controlling the stream symbol insertion rate of the source device in each SST TU or MST MTP frame. Drivers can calculate this m/n = (pixel_data_rate * drm_dp_bw_overhead()) / (link_data_rate * drm_dp_bw_channel_coding_efficiency()) ratio for a given link and pixel stream and with that the slots_per_mtp = CEIL(64 * m / n) allocated slots per MTP for the stream in a link frame and with that the pbn = slots_per_mtp * drm_mst_get_pbn_divider() allocated PBNs for the stream on the MST link path. Take drm_dp_bw_overhead() into use in drm_dp_calc_pbn_mode(), for drivers calculating the PBN value directly. v2: - Add dockbook description to drm_dp_bw_channel_coding_efficiency(). (LKP). - Clarify the way m/n ratio is calculated in the commit log. v3: - Fix compile breakage for !CONFIG_BACKLIGHT_CLASS_DEVICE. (LKP) - Account for FEC_PM overhead (+ 0.0015625 %), add comment with the formula to calculate the total FEC overhead. (Ville) v4: - Rename DRM_DP_OVERHEAD_SSC to DRM_DP_OVERHEAD_SSC_REF_CLK. (Ville) v5: - Clarify in the commit log what MTP means. - Simplify the commit log's formula to calculate PBN. Cc: Lyude Paul <lyude@redhat.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: kernel test robot <lkp@intel.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (v2) Acked-by:Lyude Paul <lyude@redhat.com> Signed-off-by:
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Imre Deak authored
Add a quirk for Synaptics MST hubs, which require a workaround - at leat on i915 - for some modes, on which the hub applies HBLANK expansion. These modes will only work by enabling DSC decompression for them, a follow-up patch will do this in i915. v2: - Fix the quirk name in its DocBook description. Cc: Lyude Paul <lyude@redhat.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Imre Deak authored
Add the DPCD flag to enable DSC passthrough in a last branch device, used in a follow-up i915 patch. Also add a flag to detect HBLANK expansion support in a branch device, used by a workaround in a follow-up i915 patch. Cc: Lyude Paul <lyude@redhat.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Imre Deak authored
The Synaptics MST branch devices support DSC decompression on all their output ports, provided that they are last branch devices (with their output ports connected to the sinks). The Thinkpad 40B0 TBT dock for instance has two such branch devices, a secondary one connected to one of the output ports of the primary; hence the decompression needs to be enabled in both branch devices to enable decompression for all the sinks. Based on the above add support for enabling decompression in last Synaptics branch devices. Cc: Lyude Paul <lyude@redhat.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Imre Deak authored
drm_dp_mst_atomic_check_mgr() should check for BW limitation starting from sink ports continuing towards the root port, so that drivers can use the @failing_port returned to resolve a BW overallocation in an ideal way. For instance from streams A,B,C in a topology A,B going through @failing_port and C not going through it, a BW overallocation of A,B due to a limit of the port must be resolved first before considering the limits of other ports closer to the root port. This way can avoid reducing the BW of stream C unnecessarily due to a BW limit closer to the root port. Based on the above swap the order of the BW check for the root port and the check for all the ports downstream of it (the latter going through the topology already in the sink->root port direction). Cc: Lyude Paul <lyude@redhat.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Imre Deak authored
Factor out a helper to check the atomic state for one MST topology manager, returning the MST port where the BW limit check has failed. This will be used in a follow-up patch by the i915 driver to improve the BW sharing between MST streams. Cc: Lyude Paul <lyude@redhat.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Imre Deak authored
Add drm_dp_mst_port_downstream_of_parent() required by the i915 driver in a follow-up patch to resolve a BW overallocation of MST streams going through a given MST port. Cc: Lyude Paul <lyude@redhat.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Ville Syrjälä authored
The current code does '(bpp << 4) / 16' in the MST PBN calculation, but that is just the same as 'bpp' so the DSC codepath achieves absolutely nothing. Fix it up so that the fractional part of the bpp value is actually used instead of truncated away. 64*1006 has enough zero lsbs that we can just shift that down in the dividend and thus still manage to stick to a 32bit divisor. And while touching this, let's just make the whole thing more straightforward by making the passed in bpp value .4 binary fixed point always, instead of having to pass in different things based on whether DSC is enabled or not. v2: - Fix DSC kunit test cases. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Lyude Paul <lyude@redhat.com> Cc: Harry Wentland <harry.wentland@amd.com> Cc: David Francis <David.Francis@amd.com> Cc: Mikita Lipski <mikita.lipski@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Fixes: dc48529f ("drm/dp_mst: Add PBN calculation for DSC modes") Signed-off-by:
Harry Wentland <harry.wentland@amd.com> Signed-off-by:
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Imre Deak authored
After drm_connector_init() is called the connector is visible to the rest of the kernel via the drm_mode_config::connector_list. Make sure that the DSC AUX device and capabilities are setup by that time. Another race condition is adding the connector to the connector list before drm_connector_helper_add() sets the connector helper functions. That's an unrelated issue, for which the fix is for a follow-up. One solution would be adding the connector to the connector list only during its registration in drm_connector_register(). Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Fixes: 808b43fa ("drm/i915/dp_mst: Set connector DSC capabilities and decompression AUX") Reviewed-by:
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