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drm/rockchip/dsi: add dw-mipi power domain support

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Reference the power domain incase dw-mipi power down when
in use.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1487577744-2855-8-git-send-email-zyw@rock-chips.com
This commit is contained in:
Chris Zhong 2017-02-20 16:02:23 +08:00 committed by Sean Paul
parent ad1c974bf1
commit 80a9a059d4
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/rockchip/dw-mipi-dsi.c
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@ -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/reset.h>
#include <linux/mfd/syscon.h>
@ -294,6 +295,7 @@ 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;
@ -924,6 +926,9 @@ 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;
if (clk_prepare_enable(dsi->pclk)) {
dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
return;
@ -935,7 +940,9 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
drm_panel_unprepare(dsi->panel);
dw_mipi_dsi_disable(dsi);
pm_runtime_put(dsi->dev);
clk_disable_unprepare(dsi->pclk);
dsi->dpms_mode = DRM_MODE_DPMS_OFF;
}
static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
@ -951,11 +958,15 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
if (ret < 0)
return;
if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
return;
if (clk_prepare_enable(dsi->pclk)) {
dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
return;
}
pm_runtime_get_sync(dsi->dev);
dw_mipi_dsi_init(dsi);
dw_mipi_dsi_dpi_config(dsi, mode);
dw_mipi_dsi_packet_handler_config(dsi);
@ -991,6 +1002,7 @@ static void dw_mipi_dsi_encoder_enable(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
@ -1158,6 +1170,7 @@ 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)
@ -1237,6 +1250,8 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
goto err_pllref;
}
pm_runtime_enable(dev);
dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
dsi->dsi_host.dev = dev;
ret = mipi_dsi_host_register(&dsi->dsi_host);
@ -1269,6 +1284,7 @@ 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);
}