[PATCH 7/7] drm: adv7511: Add hpd_override_enable feature bit to struct adv7511_chip_info

[Adam Ford]

On Sun, Aug 13, 2023 at 1:06 PM Biju Das <biju.das.jz at bp.renesas.com> wrote:
>
> As per spec, it is allowed to pulse the HPD signal to indicate that the
> EDID information has changed. Some monitors do this when they wake up
> from standby or are enabled. When the HPD goes low the adv7511 is
> reset and the outputs are disabled which might cause the monitor to
> go to standby again. To avoid this we ignore the HPD pin for the
> first few seconds after enabling the output. On the other hand,
> adv7535 require to enable HPD Override bit for proper HPD.
>
> Add hpd_override_enable feature bit to struct adv7511_chip_info to handle
> this scenario.
>
> While at it, drop the enum adv7511_type as it is unused.

It seems like dropping adv7511_type is unrelated to the rest of the
patch, and I think it should be split from this into its own patch

adam
>
> Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> ---
>  drivers/gpu/drm/bridge/adv7511/adv7511.h     |  8 +-------
>  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 12 +++++-------
>  2 files changed, 6 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> index 627531f48f84..c523ac4c9bc8 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> @@ -325,22 +325,16 @@ struct adv7511_video_config {
>         struct hdmi_avi_infoframe avi_infoframe;
>  };
>
> -enum adv7511_type {
> -       ADV7511,
> -       ADV7533,
> -       ADV7535,
> -};
> -
>  #define ADV7511_MAX_ADDRS 3
>
>  struct adv7511_chip_info {
> -       enum adv7511_type type;
>         unsigned long max_mode_clock;
>         unsigned long max_lane_freq;
>         const char * const *supply_names;
>         unsigned int num_supplies;
>         unsigned has_dsi:1;
>         unsigned link_config:1;
> +       unsigned hpd_override_enable:1;
>  };
>
>  struct adv7511 {
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> index 6974c267b1d5..7b06a0a21685 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -354,7 +354,7 @@ static void __adv7511_power_on(struct adv7511 *adv7511)
>          * first few seconds after enabling the output. On the other hand
>          * adv7535 require to enable HPD Override bit for proper HPD.
>          */
> -       if (adv7511->info->type == ADV7535)
> +       if (adv7511->info->hpd_override_enable)
>                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
>                                    ADV7535_REG_POWER2_HPD_OVERRIDE,
>                                    ADV7535_REG_POWER2_HPD_OVERRIDE);
> @@ -381,7 +381,7 @@ static void adv7511_power_on(struct adv7511 *adv7511)
>  static void __adv7511_power_off(struct adv7511 *adv7511)
>  {
>         /* TODO: setup additional power down modes */
> -       if (adv7511->info->type == ADV7535)
> +       if (adv7511->info->hpd_override_enable)
>                 regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
>                                    ADV7535_REG_POWER2_HPD_OVERRIDE, 0);
>
> @@ -682,7 +682,7 @@ adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
>                         status = connector_status_disconnected;
>         } else {
>                 /* Renable HPD sensing */
> -               if (adv7511->info->type == ADV7535)
> +               if (adv7511->info->hpd_override_enable)
>                         regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
>                                            ADV7535_REG_POWER2_HPD_OVERRIDE,
>                                            ADV7535_REG_POWER2_HPD_OVERRIDE);
> @@ -1360,14 +1360,12 @@ static void adv7511_remove(struct i2c_client *i2c)
>  }
>
>  static const struct adv7511_chip_info adv7511_chip_info = {
> -       .type = ADV7511,
>         .supply_names = adv7511_supply_names,
>         .num_supplies = ARRAY_SIZE(adv7511_supply_names),
>         .link_config = 1
>  };
>
>  static const struct adv7511_chip_info adv7533_chip_info = {
> -       .type = ADV7533,
>         .max_mode_clock = 80000,
>         .max_lane_freq = 800000,
>         .supply_names = adv7533_supply_names,
> @@ -1376,12 +1374,12 @@ static const struct adv7511_chip_info adv7533_chip_info = {
>  };
>
>  static const struct adv7511_chip_info adv7535_chip_info = {
> -       .type = ADV7535,
>         .max_mode_clock = 148500,
>         .max_lane_freq = 891000,
>         .supply_names = adv7533_supply_names,
>         .num_supplies = ARRAY_SIZE(adv7533_supply_names),
> -       .has_dsi = 1
> +       .has_dsi = 1,
> +       .hpd_override_enable = 1
>  };
>
>  static const struct i2c_device_id adv7511_i2c_ids[] = {
> --
> 2.25.1
>