[PATCH v4 06/11] drm/bridge: it6505: fix HDCP Bstatus check.
AngeloGioacchino Del Regno
angelogioacchino.delregno at collabora.com
Thu Sep 26 08:10:42 UTC 2024
Il 26/09/24 09:50, Hermes Wu ha scritto:
> From: Hermes Wu <Hermes.wu at ite.com.tw>
>
> When HDCP is activated, A DisplayPort source receives CP_IRQ from the
> sink shall check Bstatus from DPCD and process the corresponding value.
>
>
> Fixes: b5c84a9edcd4 ("drm/bridge: add it6505 driver")
> Signed-off-by: Hermes Wu <Hermes.wu at ite.com.tw>
> ---
> drivers/gpu/drm/bridge/ite-it6505.c | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
> index 5d5ce12cd054..d2ec3dfc57d6 100644
> --- a/drivers/gpu/drm/bridge/ite-it6505.c
> +++ b/drivers/gpu/drm/bridge/ite-it6505.c
> @@ -2322,14 +2322,20 @@ static int it6505_process_hpd_irq(struct it6505 *it6505)
> DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector = 0x%02x", dp_irq_vector);
>
> if (dp_irq_vector & DP_CP_IRQ) {
> - it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ,
> - HDCP_TRIGGER_CPIRQ);
> -
> bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS);
> if (bstatus < 0)
> return bstatus;
>
> DRM_DEV_DEBUG_DRIVER(dev, "Bstatus = 0x%02x", bstatus);
> +
> + /*check BSTATUS when recive CP_IRQ */
/* Check .... */
> + if (bstatus & DP_BSTATUS_R0_PRIME_READY &&
> + it6505->hdcp_status == HDCP_AUTH_GOING)
> + it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ,
> + HDCP_TRIGGER_CPIRQ);
> + else if (bstatus & (DP_BSTATUS_REAUTH_REQ | DP_BSTATUS_LINK_FAILURE) &&
> + it6505->hdcp_status == HDCP_AUTH_DONE)
> + it6505_start_hdcp(it6505);
> }
>
> ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
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