Hi, Angelo: AngeloGioacchino Del Regno <[email protected]> 於 2026年1月8日週四 上午10:20寫道： > > Up until now, the MediaTek DSI Controller has always been working > in Low Power Mode (LPM), as this driver has always ignored the > MIPI_DSI_MSG_USE_LPM flag hence never setting HS mode. > > In the current state of the driver the only thing that is needed > to add support for DSI High Speed (HS) transmit is to simply set > the "HSTX" config bit in the configuration register. > > Check if flag MIPI_DSI_MSG_USE_LPM is set and, if not, set HSTX.
Applied to mediatek-drm-next [1], thanks. [1] https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next Regards, Chun-Kuang. > > Signed-off-by: AngeloGioacchino Del Regno > <[email protected]> > --- > drivers/gpu/drm/mediatek/mtk_dsi.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c > b/drivers/gpu/drm/mediatek/mtk_dsi.c > index e4953d5cb6a8..a90cae9512c5 100644 > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c > @@ -155,6 +155,7 @@ > #define SHORT_PACKET 0 > #define LONG_PACKET 2 > #define BTA BIT(2) > +#define HSTX BIT(3) > #define DATA_ID GENMASK(15, 8) > #define DATA_0 GENMASK(23, 16) > #define DATA_1 GENMASK(31, 24) > @@ -1177,6 +1178,9 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const > struct mipi_dsi_msg *msg) > else > config = (msg->tx_len > 2) ? LONG_PACKET : SHORT_PACKET; > > + if (!(msg->flags & MIPI_DSI_MSG_USE_LPM)) > + config |= HSTX; > + > if (msg->tx_len > 2) { > cmdq_size = 1 + (msg->tx_len + 3) / 4; > cmdq_off = 4; > -- > 2.52.0 >
