Commit 8b009514 authored by AngeloGioacchino Del Regno's avatar AngeloGioacchino Del Regno Committed by Chun-Kuang Hu
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drm/mediatek: mtk_dsi: Add support for High Speed (HS) mode 



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.

Signed-off-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: default avatarGary Bisson <bisson.gary@gmail.com>
Reviewed-by: default avatarCK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20260108101959.14872-1-angelogioacchino.delregno@collabora.com/


Signed-off-by: default avatarChun-Kuang Hu <chunkuang.hu@kernel.org>
parent 24abe1f2

drivers/gpu/drm/mediatek/mtk_dsi.c

+4 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ 
#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)
@@ -1080,6 +1081,9 @@ 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;