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drm/mcde: Support using DSI in LP mode

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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: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Daniel 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
This commit is contained in:
Linus Walleij 2020-08-09 00:31:20 +02:00
parent 44c3867a56
commit f6fd1d7060
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/mcde/mcde_dsi.c
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@ -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);
}