[PATCH 4/7] drm/rockchip: dw-mipi: add dw-mipi power domain support
From: Chris Zhong
Date: Fri Jul 08 2016 - 05:06:11 EST
Reference the power domain incase dw-mipi power down when
in use.
Signed-off-by: Chris Zhong <zyw@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 100da01..15ba796 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -12,6 +12,7 @@
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <drm/drm_atomic_helper.h>
@@ -293,6 +294,7 @@ struct dw_mipi_dsi {
struct clk *pclk;
struct clk *phy_cfg_clk;
+ int dpms_mode;
unsigned int lane_mbps; /* per lane */
u32 channel;
u32 lanes;
@@ -844,6 +846,11 @@ static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
int ret;
+ if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
+ return;
+
+ pm_runtime_get_sync(dsi->dev);
+
dsi->mode = adjusted_mode;
ret = dw_mipi_dsi_get_lane_bps(dsi);
@@ -876,6 +883,9 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
{
struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
+ if (dsi->dpms_mode != DRM_MODE_DPMS_ON)
+ return;
+
drm_panel_disable(dsi->panel);
if (clk_prepare_enable(dsi->pclk)) {
@@ -896,6 +906,8 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
dw_mipi_dsi_disable(dsi);
clk_disable_unprepare(dsi->pclk);
+ pm_runtime_put(dsi->dev);
+ dsi->dpms_mode = DRM_MODE_DPMS_OFF;
}
static void dw_mipi_dsi_encoder_commit(struct drm_encoder *encoder)
@@ -929,6 +941,7 @@ static void dw_mipi_dsi_encoder_commit(struct drm_encoder *encoder)
regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
+ dsi->dpms_mode = DRM_MODE_DPMS_ON;
}
static int
@@ -1150,6 +1163,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
dsi->dev = dev;
dsi->pdata = pdata;
+ dsi->dpms_mode = DRM_MODE_DPMS_OFF;
ret = rockchip_mipi_parse_dt(dsi);
if (ret)
@@ -1195,6 +1209,8 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
dev_set_drvdata(dev, dsi);
+ pm_runtime_enable(dev);
+
dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
dsi->dsi_host.dev = dev;
return mipi_dsi_host_register(&dsi->dsi_host);
@@ -1210,6 +1226,7 @@ static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
mipi_dsi_host_unregister(&dsi->dsi_host);
+ pm_runtime_disable(dev);
clk_disable_unprepare(dsi->pllref_clk);
}
--
2.6.3