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: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/video/sh_mipi_dsi.c b/drivers/video/sh_mipi_dsi.c
index b40dc42..2323127 100644
--- a/drivers/video/sh_mipi_dsi.c
+++ b/drivers/video/sh_mipi_dsi.c
@@ -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 @@
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 @@
{
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 @@
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 @@
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 @@
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 @@
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 @@
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);