Commit f6fd1d70 authored by Linus Walleij's avatar Linus Walleij
Browse files

drm/mcde: Support using DSI in LP mode 



It is possible to set a flag in the struct mipi_dsi_device
so the panel is handled in low power (LP) mode. Some displays
only support this mode and it is also good for testing.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Cc: newbytee@protonmail.com
Cc: Stephan Gerhold <stephan@gerhold.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200808223122.1492124-2-linus.walleij@linaro.org
parent 44c3867a

drivers/gpu/drm/mcde/mcde_dsi.c

+6 −4
Original line number Diff line number Diff line
@@ -812,10 +812,11 @@ static void mcde_dsi_start(struct mcde_dsi *d) 
	/* Command mode, clear IF1 ID */

	val = readl(d->regs + DSI_CMD_MODE_CTL);

	/*

	 * If we enable low-power mode here, with

	 * val |= DSI_CMD_MODE_CTL_IF1_LP_EN

	 * If we enable low-power mode here,

	 * then display updates become really slow.

	 */

	if (d->mdsi->mode_flags & MIPI_DSI_MODE_LPM)

		val |= DSI_CMD_MODE_CTL_IF1_LP_EN;

	val &= ~DSI_CMD_MODE_CTL_IF1_ID_MASK;

	writel(val, d->regs + DSI_CMD_MODE_CTL);
@@ -904,10 +905,11 @@ static void mcde_dsi_bridge_pre_enable(struct drm_bridge *bridge) 
		/* Command mode, clear IF1 ID */

		val = readl(d->regs + DSI_CMD_MODE_CTL);

		/*

		 * If we enable low-power mode here with

		 * val |= DSI_CMD_MODE_CTL_IF1_LP_EN

		 * If we enable low-power mode here

		 * the display updates become really slow.

		 */

		if (d->mdsi->mode_flags & MIPI_DSI_MODE_LPM)

			val |= DSI_CMD_MODE_CTL_IF1_LP_EN;

		val &= ~DSI_CMD_MODE_CTL_IF1_ID_MASK;

		writel(val, d->regs + DSI_CMD_MODE_CTL);

	}

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