target/linux/bcm27xx/patches-5.4/950-0592-drm-vc4-hdmi-Move-CEC-init-to-its-own-function.patch

   1 From 9efd6edc4c7d01c74a92f2011ba285329ba956e4 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Thu, 6 Feb 2020 16:22:13 +0100
   4 Subject: [PATCH] drm/vc4: hdmi: Move CEC init to its own function
   5
   6 The CEC init code was put directly into the bind function, which was quite
   7 inconsistent with how the audio support was done, and would prevent us from
   8 further changes to skip that initialisation entirely.
   9
  10 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_hdmi.c | 108 ++++++++++++++++++++-------------
  13  1 file changed, 67 insertions(+), 41 deletions(-)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  17 @@ -1178,6 +1178,67 @@ static const struct cec_adap_ops vc4_hdm
  18         .adap_log_addr = vc4_hdmi_cec_adap_log_addr,
  19         .adap_transmit = vc4_hdmi_cec_adap_transmit,
  20  };
  21 +
  22 +static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
  23 +{
  24 +       struct cec_connector_info conn_info;
  25 +       struct platform_device *pdev = vc4_hdmi->pdev;
  26 +       u32 value;
  27 +       int ret;
  28 +
  29 +       vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
  30 +                                                 vc4_hdmi, "vc4",
  31 +                                                 CEC_CAP_DEFAULTS |
  32 +                                                 CEC_CAP_CONNECTOR_INFO, 1);
  33 +       ret = PTR_ERR_OR_ZERO(vc4_hdmi->cec_adap);
  34 +       if (ret < 0)
  35 +               return ret;
  36 +
  37 +       cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector);
  38 +       cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info);
  39 +
  40 +       HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
  41 +       value = HDMI_READ(HDMI_CEC_CNTRL_1);
  42 +       value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK;
  43 +       /*
  44 +        * Set the logical address to Unregistered and set the clock
  45 +        * divider: the hsm_clock rate and this divider setting will
  46 +        * give a 40 kHz CEC clock.
  47 +        */
  48 +       value |= VC4_HDMI_CEC_ADDR_MASK |
  49 +                (4091 << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT);
  50 +       HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
  51 +       ret = devm_request_threaded_irq(&pdev->dev, platform_get_irq(pdev, 0),
  52 +                                       vc4_cec_irq_handler,
  53 +                                       vc4_cec_irq_handler_thread, 0,
  54 +                                       "vc4 hdmi cec", vc4_hdmi);
  55 +       if (ret)
  56 +               goto err_delete_cec_adap;
  57 +
  58 +       ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev);
  59 +       if (ret < 0)
  60 +               goto err_delete_cec_adap;
  61 +
  62 +       return 0;
  63 +
  64 +err_delete_cec_adap:
  65 +       cec_delete_adapter(vc4_hdmi->cec_adap);
  66 +
  67 +       return ret;
  68 +}
  69 +
  70 +static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi)
  71 +{
  72 +       cec_unregister_adapter(vc4_hdmi->cec_adap);
  73 +}
  74 +#else
  75 +static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
  76 +{
  77 +       return 0;
  78 +}
  79 +
  80 +static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi) {};
  81 +
  82  #endif
  83
  84  static int vc4_hdmi_build_regset(struct vc4_hdmi *vc4_hdmi,
  85 @@ -1255,9 +1316,6 @@ static int vc4_hdmi_init_resources(struc
  86
  87  static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
  88  {
  89 -#ifdef CONFIG_DRM_VC4_HDMI_CEC
  90 -       struct cec_connector_info conn_info;
  91 -#endif
  92         struct platform_device *pdev = to_platform_device(dev);
  93         struct drm_device *drm = dev_get_drvdata(master);
  94         const struct vc4_hdmi_variant *variant;
  95 @@ -1345,43 +1403,13 @@ static int vc4_hdmi_bind(struct device *
  96         if (ret)
  97                 goto err_destroy_encoder;
  98
  99 -#ifdef CONFIG_DRM_VC4_HDMI_CEC
 100 -       vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
 101 -                                             vc4_hdmi, "vc4",
 102 -                                             CEC_CAP_DEFAULTS |
 103 -                                             CEC_CAP_CONNECTOR_INFO, 1);
 104 -       ret = PTR_ERR_OR_ZERO(vc4_hdmi->cec_adap);
 105 -       if (ret < 0)
 106 -               goto err_destroy_conn;
 107 -
 108 -       cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector);
 109 -       cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info);
 110 -
 111 -       HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
 112 -       value = HDMI_READ(HDMI_CEC_CNTRL_1);
 113 -       value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK;
 114 -       /*
 115 -        * Set the logical address to Unregistered and set the clock
 116 -        * divider: the hsm_clock rate and this divider setting will
 117 -        * give a 40 kHz CEC clock.
 118 -        */
 119 -       value |= VC4_HDMI_CEC_ADDR_MASK |
 120 -                (4091 << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT);
 121 -       HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
 122 -       ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
 123 -                                       vc4_cec_irq_handler,
 124 -                                       vc4_cec_irq_handler_thread, 0,
 125 -                                       "vc4 hdmi cec", vc4_hdmi);
 126 +       ret = vc4_hdmi_cec_init(vc4_hdmi);
 127         if (ret)
 128 -               goto err_delete_cec_adap;
 129 -       ret = cec_register_adapter(vc4_hdmi->cec_adap, dev);
 130 -       if (ret < 0)
 131 -               goto err_delete_cec_adap;
 132 -#endif
 133 +               goto err_destroy_conn;
 134
 135         ret = vc4_hdmi_audio_init(vc4_hdmi);
 136         if (ret)
 137 -               goto err_destroy_encoder;
 138 +               goto err_free_cec;
 139
 140         vc4_debugfs_add_file(drm,
 141                              variant->id ? "hdmi1_regs" : "hdmi_regs",
 142 @@ -1390,12 +1418,10 @@ static int vc4_hdmi_bind(struct device *
 143
 144         return 0;
 145
 146 -#ifdef CONFIG_DRM_VC4_HDMI_CEC
 147 -err_delete_cec_adap:
 148 -       cec_delete_adapter(vc4_hdmi->cec_adap);
 149 +err_free_cec:
 150 +       vc4_hdmi_cec_exit(vc4_hdmi);
 151  err_destroy_conn:
 152         vc4_hdmi_connector_destroy(&vc4_hdmi->connector);
 153 -#endif
 154  err_destroy_encoder:
 155         vc4_hdmi_encoder_destroy(encoder);
 156  err_unprepare_hsm:
 157 @@ -1420,7 +1446,7 @@ static void vc4_hdmi_unbind(struct devic
 158         kfree(vc4_hdmi->hdmi_regset.regs);
 159         kfree(vc4_hdmi->hd_regset.regs);
 160
 161 -       cec_unregister_adapter(vc4_hdmi->cec_adap);
 162 +       vc4_hdmi_cec_exit(vc4_hdmi);
 163         vc4_hdmi_connector_destroy(&vc4_hdmi->connector);
 164         vc4_hdmi_encoder_destroy(&vc4_hdmi->encoder.base.base);
 165