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Commit 80a9a059 authored by Chris Zhong's avatar Chris Zhong Committed by Sean Paul
Browse files

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



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

Signed-off-by: default avatarChris Zhong <zyw@rock-chips.com>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarSean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1487577744-2855-8-git-send-email-zyw@rock-chips.com
parent ad1c974b

drivers/gpu/drm/rockchip/dw-mipi-dsi.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

}