Messages in this thread | | | Date | Mon, 9 Jan 2023 12:26:24 +0100 | Subject | Re: [PATCH 1/2] drm/mediatek: dsi: Reduce the time of dsi from LP11 to sending cmd | From | AngeloGioacchino Del Regno <> |
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Il 06/01/23 04:05, xinlei.lee@mediatek.com ha scritto: > From: Xinlei Lee <xinlei.lee@mediatek.com> > > According to Figure 16 Turnaround Procedure on page 36 in [1], you > can see the status of LP-00 -> LP10 -> LP11. This state can correspond > to the state of DSI from LP00 -> LP11 in mtk_dsi_lane_ready function > in mtk_dsi.c. > > LP-00 -> LP10 -> LP11 takes about 2*TLPX time (refer to [1] page 51 > to see that TLPX is 50ns). > > The delay at the end of the mtk_dsi_lane_ready function should be > greater than the 2*TLPX specified by the DSI spec, and less than > the time specified by the DSI_RX (generally 6ms to 40ms), to avoid > problems caused by the RX specification. > > [1]:mipi_D-PHY_specification_v1-1 > > Fixes: 39e8d062b03c ("drm/mediatek: Keep dsi as LP00 before dcs cmds transfer") > Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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