On Thu, 2026-07-09 at 13:31 +0200, AngeloGioacchino Del Regno wrote:
> Add support for MediaTek's Embedded DisplayPort (eDP) v1.5 IP as
> found in the MT8196 SoC and other variants, and enclose some of
> the new register writes in specific platform data booleans, as:
> - SDP on Encoder1 can be supported by both old and new IPs
> but it was chosen to use Encoder0 for SDP in the new ones
> in order to decrease the load on the secondary encoder;
> - PSR can be supported by older IPs as well, but was not tested
> on those yet (requires a display with PSR support connected
> to a device with older SoC, and I don't have it right now);
> - Power State forcing may not be needed on newer revisions of
> the eDP/DP IP (in SoCs newer than MT8196/MT6991).
>
> As a note, even if this effectively adds some partial support for
> the DisplayPort 1.4 IP from the same SoC (because the DP1.4 and
> eDP1.5 IPs in this SoC have some little common parts in common),
> there is still a long road ahead to actually enable support for
> the DP1.4 IP itself.
>
> Signed-off-by: AngeloGioacchino Del Regno
> <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dp.c | 289 +++++++++++++++++++++++---
> drivers/gpu/drm/mediatek/mtk_dp_reg.h | 61 +++++-
> 2 files changed, 315 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c
> b/drivers/gpu/drm/mediatek/mtk_dp.c
> index 772ba311a34a..fe7e05e27f6f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dp.c
> @@ -2,6 +2,8 @@
> /*
> * Copyright (c) 2019-2022 MediaTek Inc.
> * Copyright (c) 2022 BayLibre
> + * Copyright (c) 2026 Collabora Ltd
> + * AngeloGioacchino Del Regno
> <[email protected]>
> */
>
> #include <drm/display/drm_dp_aux_bus.h>
> @@ -57,6 +59,8 @@
> #define MTK_DP_TOP_OFFSET_LEGACY 0x2000
>
> #define MTK_DP_SIP_CONTROL_AARCH32 MTK_SIP_SMC_CMD(0x523)
> +#define MTK_DP_SIP_ATF_EDP_SET_VID_MUTE 34
> +# define MTK_DP_SIP_REQ_VIDEO_UNMUTE 0xfefd
Align to other indent.
> #define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE 33
> #define MTK_DP_SIP_ATF_VIDEO_UNMUTE 32
>
> @@ -168,7 +172,11 @@ struct mtk_dp_data {
> bool audio_pkt_in_hblank_area;
> u16 audio_m_div2_bit;
> u8 hw_max_link_rate;
> + bool hwip_v1p4;
> bool aux_hpd_supported;
> + bool sdp_encoder1_enable;
> + bool force_pwr_states;
> + bool psr_supported;
Break this patch into hwip_v1p4, sdp_encoder1_enable, force_pwr_states,
psr_supported, and MT8196 SoC support.
Regards,
CK
> };
>
