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path: root/drivers/video/omap2/dss/dss.c
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Diffstat (limited to 'drivers/video/omap2/dss/dss.c')
-rw-r--r--drivers/video/omap2/dss/dss.c65
1 files changed, 34 insertions, 31 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index bd2d5e159463..6ea1ff149f6f 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -62,6 +62,9 @@ struct dss_reg {
#define REG_FLD_MOD(idx, val, start, end) \
dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end))
+static int dss_runtime_get(void);
+static void dss_runtime_put(void);
+
static struct {
struct platform_device *pdev;
void __iomem *base;
@@ -277,7 +280,7 @@ void dss_dump_clocks(struct seq_file *s)
dss_runtime_put();
}
-void dss_dump_regs(struct seq_file *s)
+static void dss_dump_regs(struct seq_file *s)
{
#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r))
@@ -322,6 +325,7 @@ void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src)
break;
default:
BUG();
+ return;
}
dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
@@ -335,7 +339,7 @@ void dss_select_dsi_clk_source(int dsi_module,
enum omap_dss_clk_source clk_src)
{
struct platform_device *dsidev;
- int b;
+ int b, pos;
switch (clk_src) {
case OMAP_DSS_CLK_SRC_FCK:
@@ -355,9 +359,11 @@ void dss_select_dsi_clk_source(int dsi_module,
break;
default:
BUG();
+ return;
}
- REG_FLD_MOD(DSS_CONTROL, b, 1, 1); /* DSI_CLK_SWITCH */
+ pos = dsi_module == 0 ? 1 : 10;
+ REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
dss.dsi_clk_source[dsi_module] = clk_src;
}
@@ -389,6 +395,7 @@ void dss_select_lcd_clk_source(enum omap_channel channel,
break;
default:
BUG();
+ return;
}
pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 12;
@@ -706,7 +713,7 @@ static void dss_put_clocks(void)
clk_put(dss.dss_clk);
}
-int dss_runtime_get(void)
+static int dss_runtime_get(void)
{
int r;
@@ -717,7 +724,7 @@ int dss_runtime_get(void)
return r < 0 ? r : 0;
}
-void dss_runtime_put(void)
+static void dss_runtime_put(void)
{
int r;
@@ -740,7 +747,7 @@ void dss_debug_dump_clocks(struct seq_file *s)
#endif
/* DSS HW IP initialisation */
-static int omap_dsshw_probe(struct platform_device *pdev)
+static int __init omap_dsshw_probe(struct platform_device *pdev)
{
struct resource *dss_mem;
u32 rev;
@@ -785,40 +792,24 @@ static int omap_dsshw_probe(struct platform_device *pdev)
dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
- r = dpi_init();
- if (r) {
- DSSERR("Failed to initialize DPI\n");
- goto err_dpi;
- }
-
- r = sdi_init();
- if (r) {
- DSSERR("Failed to initialize SDI\n");
- goto err_sdi;
- }
-
rev = dss_read_reg(DSS_REVISION);
printk(KERN_INFO "OMAP DSS rev %d.%d\n",
FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
dss_runtime_put();
+ dss_debugfs_create_file("dss", dss_dump_regs);
+
return 0;
-err_sdi:
- dpi_exit();
-err_dpi:
- dss_runtime_put();
+
err_runtime_get:
pm_runtime_disable(&pdev->dev);
dss_put_clocks();
return r;
}
-static int omap_dsshw_remove(struct platform_device *pdev)
+static int __exit omap_dsshw_remove(struct platform_device *pdev)
{
- dpi_exit();
- sdi_exit();
-
pm_runtime_disable(&pdev->dev);
dss_put_clocks();
@@ -829,11 +820,24 @@ static int omap_dsshw_remove(struct platform_device *pdev)
static int dss_runtime_suspend(struct device *dev)
{
dss_save_context();
+ dss_set_min_bus_tput(dev, 0);
return 0;
}
static int dss_runtime_resume(struct device *dev)
{
+ int r;
+ /*
+ * Set an arbitrarily high tput request to ensure OPP100.
+ * What we should really do is to make a request to stay in OPP100,
+ * without any tput requirements, but that is not currently possible
+ * via the PM layer.
+ */
+
+ r = dss_set_min_bus_tput(dev, 1000000000);
+ if (r)
+ return r;
+
dss_restore_context();
return 0;
}
@@ -844,8 +848,7 @@ static const struct dev_pm_ops dss_pm_ops = {
};
static struct platform_driver omap_dsshw_driver = {
- .probe = omap_dsshw_probe,
- .remove = omap_dsshw_remove,
+ .remove = __exit_p(omap_dsshw_remove),
.driver = {
.name = "omapdss_dss",
.owner = THIS_MODULE,
@@ -853,12 +856,12 @@ static struct platform_driver omap_dsshw_driver = {
},
};
-int dss_init_platform_driver(void)
+int __init dss_init_platform_driver(void)
{
- return platform_driver_register(&omap_dsshw_driver);
+ return platform_driver_probe(&omap_dsshw_driver, omap_dsshw_probe);
}
void dss_uninit_platform_driver(void)
{
- return platform_driver_unregister(&omap_dsshw_driver);
+ platform_driver_unregister(&omap_dsshw_driver);
}