[PATCH] drm: mediatek: mtk_dsi: Fix NO_EOT_PACKET settings/handling

[Chun-Kuang Hu]

Hi, Angelo:

AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com> 於
2023年10月18日 週三 下午6:21寫道：
>
> Il 15/09/23 12:11, Michael Walle ha scritto:
> >> Due to the initial confusion about MIPI_DSI_MODE_EOT_PACKET, properly
> >> renamed to MIPI_DSI_MODE_NO_EOT_PACKET, reflecting its actual meaning,
> >> both the DSI_TXRX_CON register setting for bit (HSTX_)DIS_EOT and the
> >> later calculation for horizontal sync-active (HSA), back (HBP) and
> >> front (HFP) porches got incorrect due to the logic being inverted.
> >>
> >> This means that a number of settings were wrong because....:
> >>   - DSI_TXRX_CON register setting: bit (HSTX_)DIS_EOT should be
> >>     set in order to disable the End of Transmission packet;
> >>   - Horizontal Sync and Back/Front porches: The delta used to
> >>     calculate all of HSA, HBP and HFP should account for the
> >>     additional EOT packet.
> >>
> >> Before this change...
> >>   - Bit (HSTX_)DIS_EOT was being set when EOT packet was enabled;
> >>   - For HSA/HBP/HFP delta... all three were wrong, as words were
> >>     added when EOT disabled, instead of when EOT packet enabled!
> >>
> >> Invert the logic around flag MIPI_DSI_MODE_NO_EOT_PACKET in the
> >> MediaTek DSI driver to fix the aforementioned issues.
> >>
> >> Fixes: 8b2b99fd7931 ("drm/mediatek: dsi: Fine tune the line time caused by EOTp")
> >> Fixes: 2d52bfba09d1 ("drm/mediatek: add non-continuous clock mode and EOT packet control")
> >> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> >
>
> Hello CK,
>
> can you please pick this fix?

Applied with the changing

Fixes: 2d52bfba09d1 ("drm/mediatek: add non-continuous clock mode and
EOT packet control")

to

Fixes: c87d1c4b5b9a ("drm/mediatek: dsi: Use symbolized register definition")

Regards,
Chun-Kuang.

>
> Thanks,
> Angelo
>