On Thu, 2026-07-09 at 13:31 +0200, AngeloGioacchino Del Regno wrote:
> Newer MediaTek DisplayPort IPs can finally use the AUX to perform
> hotplug detection (HPD) without having to power up the entire eDP
> or DP IP (transmitter, encoder, etc).
>
> Enable support for configuring and performing HPD in AUX and check
> the correct HPD strategy with a new platform data variable.
> This is done in preparation for adding support for the embedded
> DisplayPort (eDP) IP found in the MT8196 SoC.
>
> Signed-off-by: AngeloGioacchino Del Regno
> <[email protected]>
> ---
[snip]
> static void mtk_dp_hwirq_enable(struct mtk_dp *mtk_dp, bool enable)
> {
> + u32 mask, val;
> +
> + /* On SoCs with working AUX HPD, the transmitter HPD register is
> ignored by HW */
> + if (enable) {
> + mask = HPD_CONNECT_EVENT | HPD_INTERRUPT_EVENT |
> HPD_DISCONNECT_EVENT;
> + val = 0;
> + } else {
> + mask = DP_TX_AUX_INT_MASK;
> + val = DP_TX_AUX_INT_MASK;
> + }
> + mtk_dp_update_bits(mtk_dp, MTK_DP_TX_AUX_INT_MASKING, val, mask);
Why not refer to below coding?
Regards,
CK
> +
> mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
> enable ? 0 :
> IRQ_MASK_DP_TRANS_P0_DISC_IRQ |
> @@ -1089,9 +1133,34 @@ static void mtk_dp_initialize_settings(struct mtk_dp
> *mtk_dp)
> IRQ_MASK_AUX_TOP_IRQ, IRQ_MASK_AUX_TOP_IRQ);
> }
>
>
