[PATCH v2] drm/mediatek: dp: Add phy_mtk_dp module as pre-dependency

[Guillaume Ranquet]

On Tue, 21 Nov 2023 15:29, "Nícolas F. R. A. Prado"
<nfraprado at collabora.com> wrote:
>The mtk_dp driver registers a phy device which is handled by the
>phy_mtk_dp driver and assumes that the phy probe will complete
>synchronously, proceeding to make use of functionality exposed by that
>driver right away. This assumption however is false when the phy driver
>is built as a module, causing the mtk_dp driver to fail probe in this
>case.
>
>Add the phy_mtk_dp module as a pre-dependency to the mtk_dp module to
>ensure the phy module has been loaded before the dp, so that the phy
>probe happens synchrounously and the mtk_dp driver can probe
>successfully even with the phy driver built as a module.
>
>Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
>Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
>Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
>Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
>
>---

Reviewed-by: Guillaume Ranquet <granquet at baylibre.com>
>
>Changes in v2:
>- Added missing Suggested-by tag
>
> drivers/gpu/drm/mediatek/mtk_dp.c | 1 +
> 1 file changed, 1 insertion(+)
>
>diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
>index e4c16ba9902d..2136a596efa1 100644
>--- a/drivers/gpu/drm/mediatek/mtk_dp.c
>+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
>@@ -2818,3 +2818,4 @@ MODULE_AUTHOR("Markus Schneider-Pargmann <msp at baylibre.com>");
> MODULE_AUTHOR("Bo-Chen Chen <rex-bc.chen at mediatek.com>");
> MODULE_DESCRIPTION("MediaTek DisplayPort Driver");
> MODULE_LICENSE("GPL");
>+MODULE_SOFTDEP("pre: phy_mtk_dp");
>--
>2.42.1
>