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.
Cc: Stephan Gerhold <step...@gerhold.net>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
drivers/gpu/drm/mcde/mcde_dsi.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c
index 889c39efa80c..d4a12fe7ff01 100644
--- a/drivers/gpu/drm/mcde/mcde_dsi.c
+++ b/drivers/gpu/drm/mcde/mcde_dsi.c
@@ -648,10 +648,11 @@ 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);
@@ -740,10 +741,11 @@ 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);
}
--
2.21.0
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