Chen-Yu Tsai <wenst@xxxxxxxxxxxx> 於 2022年8月19日 週五 晚上9:29寫道： > > On Fri, Jul 22, 2022 at 1:27 AM AngeloGioacchino Del Regno > <angelogioacchino.delregno@xxxxxxxxxxxxx> wrote: > > > > Add callbacks for atomic_destroy_state, atomic_duplicate_state and > > atomic_reset to restore functionality of the DSI driver: this solves > > vblank timeouts when another bridge is present in the chain. > > > > Tested bridge chain: DSI <=> ANX7625 => aux-bus panel > > Applied to mediatek-drm-fixes [1], thanks. [1] https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-fixes Regards, Chun-Kuang. > > Fixes: 7f6335c6a258 ("drm/mediatek: Modify dsi funcs to atomic operations") > > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> > > This patch is now needed on top of v6.0-rc1, otherwise booting will > stall for a while waiting for display vblank, which never happens > because the DSI pipeline is not configured correctly. > > ChenYu > > > --- > > > > Note: The commit that has been mentioned in the Fixes tag should > > *not* have my Reviewed-by tag, as the author changed it but > > erroneously retained the tag that I had released for an > > earlier version of that commit (which was fine, but the new > > version broke mtk_dsi!). > > > > drivers/gpu/drm/mediatek/mtk_dsi.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > > index 9cc406e1eee1..5b624e0f5b0a 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c > > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c > > @@ -808,10 +808,13 @@ static void mtk_dsi_bridge_atomic_post_disable(struct drm_bridge *bridge, > > > > static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = { > > .attach = mtk_dsi_bridge_attach, > > + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > > .atomic_disable = mtk_dsi_bridge_atomic_disable, > > + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > > .atomic_enable = mtk_dsi_bridge_atomic_enable, > > .atomic_pre_enable = mtk_dsi_bridge_atomic_pre_enable, > > .atomic_post_disable = mtk_dsi_bridge_atomic_post_disable, > > + .atomic_reset = drm_atomic_helper_bridge_reset, > > .mode_set = mtk_dsi_bridge_mode_set, > > }; > > > > -- > > 2.35.1 > >
