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authorTomi Valkeinen <tomi.valkeinen@ti.com>2013-12-16 15:13:24 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2014-03-19 11:03:07 +0200
commit2ecef24630f434e58bf3e5adb4d9bb76e50daf78 (patch)
treecb09ca4d405f681e361266f10daadf3bd971b154 /drivers/video
parente6fa68ba82959bd2468271788d89e0fdb2f781e4 (diff)
downloadlinux-2ecef24630f434e58bf3e5adb4d9bb76e50daf78.tar.bz2
OMAPDSS: Add DT support to DSS
Add DT support for DSS. Contrary to the non-DT version, the DSS in DT mode contains DPI and SDI outputs, which better reflects the hardware. The non-DT code will be removed after all boards have been converted to DT, so there's no need to change the non-DT code to act the same way. The code for DPI and SDI needs to be refined later to make it possible to add multiple DPI ports. For now, handling just a single DPI port is enough for all the boards. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Reviewed-by: Archit Taneja <archit@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/omap2/dss/dpi.c47
-rw-r--r--drivers/video/omap2/dss/dss.c66
-rw-r--r--drivers/video/omap2/dss/dss.h6
-rw-r--r--drivers/video/omap2/dss/sdi.c45
4 files changed, 164 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 23ef21ffc2c4..f02520ff6e32 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -30,6 +30,7 @@
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/string.h>
+#include <linux/of.h>
#include <video/omapdss.h>
@@ -49,6 +50,8 @@ static struct {
int data_lines;
struct omap_dss_device output;
+
+ bool port_initialized;
} dpi;
static struct platform_device *dpi_get_dsidev(enum omap_channel channel)
@@ -726,3 +729,47 @@ void __exit dpi_uninit_platform_driver(void)
{
platform_driver_unregister(&omap_dpi_driver);
}
+
+int __init dpi_init_port(struct platform_device *pdev, struct device_node *port)
+{
+ struct device_node *ep;
+ u32 datalines;
+ int r;
+
+ ep = omapdss_of_get_next_endpoint(port, NULL);
+ if (!ep)
+ return 0;
+
+ r = of_property_read_u32(ep, "data-lines", &datalines);
+ if (r) {
+ DSSERR("failed to parse datalines\n");
+ goto err_datalines;
+ }
+
+ dpi.data_lines = datalines;
+
+ of_node_put(ep);
+
+ dpi.pdev = pdev;
+
+ mutex_init(&dpi.lock);
+
+ dpi_init_output(pdev);
+
+ dpi.port_initialized = true;
+
+ return 0;
+
+err_datalines:
+ of_node_put(ep);
+
+ return r;
+}
+
+void __exit dpi_uninit_port(void)
+{
+ if (!dpi.port_initialized)
+ return;
+
+ dpi_uninit_output(dpi.pdev);
+}
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index 9a145da35ad3..1b1c02dfdcf9 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -23,6 +23,7 @@
#define DSS_SUBSYS_NAME "DSS"
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/io.h>
#include <linux/export.h>
#include <linux/err.h>
@@ -33,6 +34,7 @@
#include <linux/pm_runtime.h>
#include <linux/gfp.h>
#include <linux/sizes.h>
+#include <linux/of.h>
#include <video/omapdss.h>
@@ -788,6 +790,56 @@ static int __init dss_init_features(struct platform_device *pdev)
return 0;
}
+static int dss_init_ports(struct platform_device *pdev)
+{
+ struct device_node *parent = pdev->dev.of_node;
+ struct device_node *port;
+ int r;
+
+ if (parent == NULL)
+ return 0;
+
+ port = omapdss_of_get_next_port(parent, NULL);
+ if (!port) {
+#ifdef CONFIG_OMAP2_DSS_DPI
+ dpi_init_port(pdev, parent);
+#endif
+ return 0;
+ }
+
+ do {
+ u32 reg;
+
+ r = of_property_read_u32(port, "reg", &reg);
+ if (r)
+ reg = 0;
+
+#ifdef CONFIG_OMAP2_DSS_DPI
+ if (reg == 0)
+ dpi_init_port(pdev, port);
+#endif
+
+#ifdef CONFIG_OMAP2_DSS_SDI
+ if (reg == 1)
+ sdi_init_port(pdev, port);
+#endif
+
+ } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
+
+ return 0;
+}
+
+static void dss_uninit_ports(void)
+{
+#ifdef CONFIG_OMAP2_DSS_DPI
+ dpi_uninit_port();
+#endif
+
+#ifdef CONFIG_OMAP2_DSS_SDI
+ sdi_uninit_port();
+#endif
+}
+
/* DSS HW IP initialisation */
static int __init omap_dsshw_probe(struct platform_device *pdev)
{
@@ -846,6 +898,8 @@ static int __init 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;
+ dss_init_ports(pdev);
+
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));
@@ -865,6 +919,8 @@ err_setup_clocks:
static int __exit omap_dsshw_remove(struct platform_device *pdev)
{
+ dss_uninit_ports();
+
pm_runtime_disable(&pdev->dev);
dss_put_clocks();
@@ -902,12 +958,22 @@ static const struct dev_pm_ops dss_pm_ops = {
.runtime_resume = dss_runtime_resume,
};
+static const struct of_device_id dss_of_match[] = {
+ { .compatible = "ti,omap2-dss", },
+ { .compatible = "ti,omap3-dss", },
+ { .compatible = "ti,omap4-dss", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, dss_of_match);
+
static struct platform_driver omap_dsshw_driver = {
.remove = __exit_p(omap_dsshw_remove),
.driver = {
.name = "omapdss_dss",
.owner = THIS_MODULE,
.pm = &dss_pm_ops,
+ .of_match_table = dss_of_match,
},
};
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 057f24c8a332..8ece4f531006 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -252,6 +252,9 @@ bool dss_div_calc(unsigned long pck, unsigned long fck_min,
int sdi_init_platform_driver(void) __init;
void sdi_uninit_platform_driver(void) __exit;
+int sdi_init_port(struct platform_device *pdev, struct device_node *port) __init;
+void sdi_uninit_port(void) __exit;
+
/* DSI */
typedef bool (*dsi_pll_calc_func)(int regn, int regm, unsigned long fint,
@@ -363,6 +366,9 @@ static inline bool dsi_pll_calc(struct platform_device *dsidev,
int dpi_init_platform_driver(void) __init;
void dpi_uninit_platform_driver(void) __exit;
+int dpi_init_port(struct platform_device *pdev, struct device_node *port) __init;
+void dpi_uninit_port(void) __exit;
+
/* DISPC */
int dispc_init_platform_driver(void) __init;
void dispc_uninit_platform_driver(void) __exit;
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index ba806c9e7f54..d16277ca22a8 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -26,6 +26,7 @@
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/string.h>
+#include <linux/of.h>
#include <video/omapdss.h>
#include "dss.h"
@@ -41,6 +42,8 @@ static struct {
int datapairs;
struct omap_dss_device output;
+
+ bool port_initialized;
} sdi;
struct sdi_clk_calc_ctx {
@@ -387,3 +390,45 @@ void __exit sdi_uninit_platform_driver(void)
{
platform_driver_unregister(&omap_sdi_driver);
}
+
+int __init sdi_init_port(struct platform_device *pdev, struct device_node *port)
+{
+ struct device_node *ep;
+ u32 datapairs;
+ int r;
+
+ ep = omapdss_of_get_next_endpoint(port, NULL);
+ if (!ep)
+ return 0;
+
+ r = of_property_read_u32(ep, "datapairs", &datapairs);
+ if (r) {
+ DSSERR("failed to parse datapairs\n");
+ goto err_datapairs;
+ }
+
+ sdi.datapairs = datapairs;
+
+ of_node_put(ep);
+
+ sdi.pdev = pdev;
+
+ sdi_init_output(pdev);
+
+ sdi.port_initialized = true;
+
+ return 0;
+
+err_datapairs:
+ of_node_put(ep);
+
+ return r;
+}
+
+void __exit sdi_uninit_port(void)
+{
+ if (!sdi.port_initialized)
+ return;
+
+ sdi_uninit_output(sdi.pdev);
+}