diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-12-27 10:23:05 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-01-05 17:16:05 +0900 |
| commit | 236782a5f3674d06865d822092b8a1ea65a44f96 (patch) | |
| tree | 547b8376a220e2b853a197e23ab57a6a7dca9082 /drivers | |
| parent | 6722a4016d7f5f107a82ad71a3ee1ccec105532f (diff) | |
| download | linux-236782a5f3674d06865d822092b8a1ea65a44f96.tar.bz2 | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/sh_mipi_dsi.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/video/sh_mipi_dsi.c b/drivers/video/sh_mipi_dsi.c index b40dc423cbdf..23231279c387 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 @@ 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); |