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fbdev: sh-mobile: implement MIPI DSI runtime PM support

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

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Guennadi Liakhovetski 2010-12-27 10:23:05 +00:00 committed by Paul Mundt
parent 6722a4016d
commit 236782a5f3
1 changed files with 17 additions and 3 deletions
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20
drivers/video/sh_mipi_dsi.c
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@ -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>
@ -50,9 +51,11 @@ struct sh_mipi {
void __iomem *linkbase;
struct clk *dsit_clk;
struct clk *dsip_clk;
void *next_board_data;
void (*next_display_on)(void *board_data, struct fb_info *info);
void (*next_display_off)(void *board_data);
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);
};
static struct sh_mipi *mipi_dsi[MAX_SH_MIPI_DSI];
@ -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);