Re: [PATCH] drm/i915: Add DPCD quirk for AUO PSR2 panel

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Hi Gaurav,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip linus/master v5.5-rc1 next-20191210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Gaurav-K-Singh/drm-i915-Add-DPCD-quirk-for-AUO-PSR2-panel/20191211-064743
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
reproduce: make htmldocs

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   Warning: The Sphinx 'sphinx_rtd_theme' HTML theme was not found. Make sure you have the theme installed to produce pretty HTML output. Falling back to the default theme.
   WARNING: dot(1) not found, for better output quality install graphviz from http://www.graphviz.org
   WARNING: convert(1) not found, for SVG to PDF conversion install ImageMagick (https://www.imagemagick.org)
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'quotactl' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'quota_on' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'sb_free_mnt_opts' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'sb_eat_lsm_opts' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'sb_kern_mount' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'sb_show_options' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'sb_add_mnt_opt' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'd_instantiate' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'getprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'setprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1822: warning: Function parameter or member 'locked_down' not described in 'security_list_options'
   fs/posix_acl.c:647: warning: Function parameter or member 'inode' not described in 'posix_acl_update_mode'
   fs/posix_acl.c:647: warning: Function parameter or member 'mode_p' not described in 'posix_acl_update_mode'
   fs/posix_acl.c:647: warning: Function parameter or member 'acl' not described in 'posix_acl_update_mode'
   include/linux/regulator/machine.h:196: warning: Function parameter or member 'max_uV_step' not described in 'regulation_constraints'
   include/linux/regulator/driver.h:223: warning: Function parameter or member 'resume' not described in 'regulator_ops'
   include/linux/spi/spi.h:190: warning: Function parameter or member 'driver_override' not described in 'spi_device'
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_register_driver' not found
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_unregister_driver' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_register_notifier' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_unregister_notifier' not found
   include/linux/w1.h:277: warning: Function parameter or member 'of_match_table' not described in 'w1_family'
   drivers/gpio/gpiolib-of.c:92: warning: Excess function parameter 'dev' description in 'of_gpio_need_valid_mask'
   include/linux/i2c.h:337: warning: Function parameter or member 'init_irq' not described in 'i2c_client'
   kernel/dma/coherent.c:1: warning: no structured comments found
   include/linux/input/sparse-keymap.h:43: warning: Function parameter or member 'sw' not described in 'key_entry'
   include/linux/skbuff.h:888: warning: Function parameter or member 'dev_scratch' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'list' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'ip_defrag_offset' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'skb_mstamp_ns' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member '__cloned_offset' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'head_frag' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member '__pkt_type_offset' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'encapsulation' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'encap_hdr_csum' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'csum_valid' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member '__pkt_vlan_present_offset' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'vlan_present' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'csum_complete_sw' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'csum_level' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'inner_protocol_type' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'remcsum_offload' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'sender_cpu' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'reserved_tailroom' not described in 'sk_buff'
   include/linux/skbuff.h:888: warning: Function parameter or member 'inner_ipproto' not described in 'sk_buff'
   include/net/sock.h:233: warning: Function parameter or member 'skc_addrpair' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_portpair' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_ipv6only' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_net_refcnt' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_v6_daddr' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_v6_rcv_saddr' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_cookie' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_listener' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_tw_dr' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_rcv_wnd' not described in 'sock_common'
   include/net/sock.h:233: warning: Function parameter or member 'skc_tw_rcv_nxt' not described in 'sock_common'
   include/net/sock.h:515: warning: Function parameter or member 'sk_rx_skb_cache' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'sk_wq_raw' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'tcp_rtx_queue' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'sk_tx_skb_cache' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'sk_route_forced_caps' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'sk_txtime_report_errors' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'sk_validate_xmit_skb' not described in 'sock'
   include/net/sock.h:515: warning: Function parameter or member 'sk_bpf_storage' not described in 'sock'
   include/net/sock.h:2455: warning: Function parameter or member 'tcp_rx_skb_cache_key' not described in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2455: warning: Excess function parameter 'sk' description in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2455: warning: Excess function parameter 'skb' description in 'DECLARE_STATIC_KEY_FALSE'
   include/linux/netdevice.h:1765: warning: bad line:                                 spinlock
   include/linux/netdevice.h:2063: warning: Function parameter or member 'gso_partial_features' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'l3mdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'xfrmdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'tlsdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'name_assign_type' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'ieee802154_ptr' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'mpls_ptr' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'xdp_prog' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'gro_flush_timeout' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'nf_hooks_ingress' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member '____cacheline_aligned_in_smp' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'qdisc_hash' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'xps_cpus_map' not described in 'net_device'
   include/linux/netdevice.h:2063: warning: Function parameter or member 'xps_rxqs_map' not described in 'net_device'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising' not described in 'phylink_link_state'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising' not described in 'phylink_link_state'
   lib/genalloc.c:1: warning: 'gen_pool_add_virt' not found
   lib/genalloc.c:1: warning: 'gen_pool_alloc' not found
   lib/genalloc.c:1: warning: 'gen_pool_free' not found
   lib/genalloc.c:1: warning: 'gen_pool_alloc_algo' not found
   include/linux/rculist.h:374: warning: Excess function parameter 'cond' description in 'list_for_each_entry_rcu'
   include/linux/rculist.h:651: warning: Excess function parameter 'cond' description in 'hlist_for_each_entry_rcu'
   mm/util.c:1: warning: 'get_user_pages_fast' not found
   drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c:1: warning: no structured comments found
   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1: warning: no structured comments found
   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h:254: warning: Function parameter or member 'hdcp_workqueue' not described in 'amdgpu_display_manager'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'prepare_writeback_job' not described in 'drm_connector_helper_funcs'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'cleanup_writeback_job' not described in 'drm_connector_helper_funcs'
   include/drm/drm_dp_helper.h:1525: warning: Incorrect use of kernel-doc format:          * @DP_DPCD_QUIRK_SYNCHRONIZATION_LATENCY
>> include/drm/drm_dp_helper.h:1533: warning: Enum value 'DP_DPCD_QUIRK_SYNCHRONIZATION_LATENCY' not described in enum 'drm_dp_quirk'
   include/net/cfg80211.h:1185: warning: Function parameter or member 'txpwr' not described in 'station_parameters'
   include/net/mac80211.h:4056: warning: Function parameter or member 'sta_set_txpwr' not described in 'ieee80211_ops'
   include/net/mac80211.h:2018: warning: Function parameter or member 'txpwr' not described in 'ieee80211_sta'
   Documentation/admin-guide/perf/imx-ddr.rst:21: WARNING: Unexpected indentation.
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   drivers/ata/libata-core.c:5945: WARNING: Unknown target name: "hw".
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   fs/seq_file.c:40: WARNING: Inline strong start-string without end-string.
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   fs/posix_acl.c:636: WARNING: Inline emphasis start-string without end-string.
   fs/debugfs/inode.c:427: WARNING: Inline literal start-string without end-string.
   fs/debugfs/inode.c:506: WARNING: Inline literal start-string without end-string.
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   include/linux/regulator/driver.h:284: WARNING: Unknown target name: "regulator_regmap_x_voltage".
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vim +1533 include/drm/drm_dp_helper.h

118b90f3f18e73 Jani Nikula           2017-05-18  1490  
118b90f3f18e73 Jani Nikula           2017-05-18  1491  int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc,
118b90f3f18e73 Jani Nikula           2017-05-18  1492  		     bool is_branch);
118b90f3f18e73 Jani Nikula           2017-05-18  1493  
76fa998acd86b6 Jani Nikula           2017-05-18  1494  /**
76fa998acd86b6 Jani Nikula           2017-05-18  1495   * enum drm_dp_quirk - Display Port sink/branch device specific quirks
76fa998acd86b6 Jani Nikula           2017-05-18  1496   *
76fa998acd86b6 Jani Nikula           2017-05-18  1497   * Display Port sink and branch devices in the wild have a variety of bugs, try
76fa998acd86b6 Jani Nikula           2017-05-18  1498   * to collect them here. The quirks are shared, but it's up to the drivers to
76fa998acd86b6 Jani Nikula           2017-05-18  1499   * implement workarounds for them.
76fa998acd86b6 Jani Nikula           2017-05-18  1500   */
76fa998acd86b6 Jani Nikula           2017-05-18  1501  enum drm_dp_quirk {
76fa998acd86b6 Jani Nikula           2017-05-18  1502  	/**
53ca2edcf033f3 Lee, Shawn C          2018-09-11  1503  	 * @DP_DPCD_QUIRK_CONSTANT_N:
76fa998acd86b6 Jani Nikula           2017-05-18  1504  	 *
76fa998acd86b6 Jani Nikula           2017-05-18  1505  	 * The device requires main link attributes Mvid and Nvid to be limited
53ca2edcf033f3 Lee, Shawn C          2018-09-11  1506  	 * to 16 bits. So will give a constant value (0x8000) for compatability.
76fa998acd86b6 Jani Nikula           2017-05-18  1507  	 */
53ca2edcf033f3 Lee, Shawn C          2018-09-11  1508  	DP_DPCD_QUIRK_CONSTANT_N,
7c5c641a930ed0 José Roberto de Souza 2018-12-03  1509  	/**
ed17b555303c74 José Roberto de Souza 2018-12-05  1510  	 * @DP_DPCD_QUIRK_NO_PSR:
7c5c641a930ed0 José Roberto de Souza 2018-12-03  1511  	 *
7c5c641a930ed0 José Roberto de Souza 2018-12-03  1512  	 * The device does not support PSR even if reports that it supports or
7c5c641a930ed0 José Roberto de Souza 2018-12-03  1513  	 * driver still need to implement proper handling for such device.
7c5c641a930ed0 José Roberto de Souza 2018-12-03  1514  	 */
7c5c641a930ed0 José Roberto de Souza 2018-12-03  1515  	DP_DPCD_QUIRK_NO_PSR,
7974033e527a5d Ville Syrjälä         2019-05-28  1516  	/**
7974033e527a5d Ville Syrjälä         2019-05-28  1517  	 * @DP_DPCD_QUIRK_NO_SINK_COUNT:
7974033e527a5d Ville Syrjälä         2019-05-28  1518  	 *
7974033e527a5d Ville Syrjälä         2019-05-28  1519  	 * The device does not set SINK_COUNT to a non-zero value.
7974033e527a5d Ville Syrjälä         2019-05-28  1520  	 * The driver should ignore SINK_COUNT during detection.
7974033e527a5d Ville Syrjälä         2019-05-28  1521  	 */
7974033e527a5d Ville Syrjälä         2019-05-28  1522  	DP_DPCD_QUIRK_NO_SINK_COUNT,
8c57c0a07182ad Gaurav K Singh        2019-12-10  1523  	/**
8c57c0a07182ad Gaurav K Singh        2019-12-10  1524  	 * @DP_DPCD_QUIRK_SYNCHRONIZATION_LATENCY
8c57c0a07182ad Gaurav K Singh        2019-12-10 @1525  	 *
8c57c0a07182ad Gaurav K Singh        2019-12-10  1526  	 * The Helios AUO PSR2 panel requires more number of frames on PSR exit,
8c57c0a07182ad Gaurav K Singh        2019-12-10  1527  	 * to synchronize to the Source device-provided timing. Currently DPCD
8c57c0a07182ad Gaurav K Singh        2019-12-10  1528  	 * 0x2009 offset in TCON has the value of 0. Increasing this value to 8
8c57c0a07182ad Gaurav K Singh        2019-12-10  1529  	 * till this gets fixed in TCON of the panel.
8c57c0a07182ad Gaurav K Singh        2019-12-10  1530  	 */
8c57c0a07182ad Gaurav K Singh        2019-12-10  1531  	DP_DPCD_QUIRK_SYNCHRONIZATION_LATENCY,
76fa998acd86b6 Jani Nikula           2017-05-18  1532  };
76fa998acd86b6 Jani Nikula           2017-05-18 @1533  

:::::: The code at line 1533 was first introduced by commit
:::::: 76fa998acd86b6b40d0217e12af39c2406bdcd2b drm/dp: start a DPCD based DP sink/branch device quirk database

:::::: TO: Jani Nikula <jani.nikula@xxxxxxxxx>
:::::: CC: Jani Nikula <jani.nikula@xxxxxxxxx>

---
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