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Commit 236782a5 authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Paul Mundt
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fbdev: sh-mobile: implement MIPI DSI runtime PM support 



On SH-Mobile platforms using runtime PM with the MIPI DSI driver switches the
DSI Tx link clock on PM events.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 6722a401

drivers/video/sh_mipi_dsi.c

+17 −3
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/init.h>

#include <linux/io.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/types.h>
@@ -50,6 +51,8 @@ struct sh_mipi { 
	void __iomem	*linkbase;

	struct clk	*dsit_clk;

	struct clk	*dsip_clk;

	struct device	*dev;



	void	*next_board_data;

	void	(*next_display_on)(void *board_data, struct fb_info *info);

	void	(*next_display_off)(void *board_data);
@@ -124,6 +127,7 @@ static void mipi_display_on(void *arg, struct fb_info *info) 
{

	struct sh_mipi *mipi = arg;



	pm_runtime_get_sync(mipi->dev);

	sh_mipi_dsi_enable(mipi, true);



	if (mipi->next_display_on)
@@ -138,6 +142,7 @@ static void mipi_display_off(void *arg) 
		mipi->next_display_off(mipi->next_board_data);



	sh_mipi_dsi_enable(mipi, false);

	pm_runtime_put(mipi->dev);

}



static int __init sh_mipi_setup(struct sh_mipi *mipi,
@@ -396,6 +401,8 @@ static int __init sh_mipi_probe(struct platform_device *pdev) 
		goto emap2;

	}



	mipi->dev = &pdev->dev;



	mipi->dsit_clk = clk_get(&pdev->dev, "dsit_clk");

	if (IS_ERR(mipi->dsit_clk)) {

		ret = PTR_ERR(mipi->dsit_clk);
@@ -445,6 +452,9 @@ static int __init sh_mipi_probe(struct platform_device *pdev) 


	mipi_dsi[idx] = mipi;



	pm_runtime_enable(&pdev->dev);

	pm_runtime_resume(&pdev->dev);



	ret = sh_mipi_setup(mipi, pdata);

	if (ret < 0)

		goto emipisetup;
@@ -461,11 +471,13 @@ static int __init sh_mipi_probe(struct platform_device *pdev) 
	pdata->lcd_chan->board_cfg.board_data = mipi;

	pdata->lcd_chan->board_cfg.display_on = mipi_display_on;

	pdata->lcd_chan->board_cfg.display_off = mipi_display_off;

	pdata->lcd_chan->board_cfg.owner = THIS_MODULE;



	return 0;



emipisetup:

	mipi_dsi[idx] = NULL;

	pm_runtime_disable(&pdev->dev);

	clk_disable(mipi->dsip_clk);

eclkpon:

	clk_disable(mipi->dsit_clk);
@@ -517,10 +529,12 @@ static int __exit sh_mipi_remove(struct platform_device *pdev) 
	if (ret < 0)

		return ret;



	pdata->lcd_chan->board_cfg.owner = NULL;

	pdata->lcd_chan->board_cfg.display_on = NULL;

	pdata->lcd_chan->board_cfg.display_off = NULL;

	pdata->lcd_chan->board_cfg.board_data = NULL;



	pm_runtime_disable(&pdev->dev);

	clk_disable(mipi->dsip_clk);

	clk_disable(mipi->dsit_clk);

	clk_put(mipi->dsit_clk);