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Commit 78cfd7ee authored by Xiaoming Zhou's avatar Xiaoming Zhou
Browse files

msm: mdss: expose MDP capabilities through sysfs on 8x10 



Currently, MDP capabilities are exposed to the client via
a dedicated ioctl.  As more capabilities are added, it becomes
difficult to have to extend and maintain header file compatibility.
This change is to add a sysfs node which can be used to get the
MDP capabilities.

Change-Id: I9eb2e5546f708eb3f46c61f9abe4f25f23cd64aa
Signed-off-by: default avatarXiaoming Zhou <zhoux@codeaurora.org>
parent 6badacdb

drivers/video/msm/mdss/mdp3.c

+51 −0
Original line number Diff line number Diff line
@@ -1936,6 +1936,53 @@ static void mdp3_dma_underrun_intr_handler(int type, void *arg) 
			mdp3_res->underrun_cnt);

}



static ssize_t mdp3_show_capabilities(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	size_t len = PAGE_SIZE;

	int cnt = 0;



#define SPRINT(fmt, ...) \

		(cnt += scnprintf(buf + cnt, len - cnt, fmt, ##__VA_ARGS__))



	SPRINT("mdp_version=3\n");

	SPRINT("hw_rev=%d\n", 304);

	SPRINT("dma_pipes=%d\n", 1);

	SPRINT("\n");



	return cnt;

}



static DEVICE_ATTR(caps, S_IRUGO, mdp3_show_capabilities, NULL);



static struct attribute *mdp3_fs_attrs[] = {

	&dev_attr_caps.attr,

	NULL

};



static struct attribute_group mdp3_fs_attr_group = {

	.attrs = mdp3_fs_attrs

};



static int mdp3_register_sysfs(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	int rc;



	rc = sysfs_create_group(&dev->kobj, &mdp3_fs_attr_group);



	return rc;

}



int mdp3_create_sysfs_link(struct device *dev)

{

	int rc;

	rc = sysfs_create_link_nowarn(&dev->kobj,

			&mdp3_res->pdev->dev.kobj, "mdp");



	return rc;

}



static int mdp3_probe(struct platform_device *pdev)

{

	int rc;
@@ -1994,6 +2041,10 @@ static int mdp3_probe(struct platform_device *pdev) 
		goto probe_done;

	}



	rc = mdp3_register_sysfs(pdev);

	if (rc)

		pr_err("unable to register mdp sysfs nodes\n");



	rc = mdss_fb_register_mdp_instance(&mdp3_interface);

	if (rc)

		pr_err("unable to register mdp instance\n");

drivers/video/msm/mdss/mdp3.h

+1 −0
Original line number Diff line number Diff line
@@ -188,6 +188,7 @@ int mdp3_iommu_is_attached(int client); 
void mdp3_free(void);

int mdp3_parse_dt_splash(struct msm_fb_data_type *mfd);

void mdp3_release_splash_memory(void);

int mdp3_create_sysfs_link(struct device *dev);



#define MDP3_REG_WRITE(addr, val) writel_relaxed(val, mdp3_res->mdp_base + addr)

#define MDP3_REG_READ(addr) readl_relaxed(mdp3_res->mdp_base + addr)

drivers/video/msm/mdss/mdp3_ctrl.c

+4 −0
Original line number Diff line number Diff line
@@ -1555,6 +1555,10 @@ int mdp3_ctrl_init(struct msm_fb_data_type *mfd) 
		goto init_done;

	}



	rc = mdp3_create_sysfs_link(dev);

	if (rc)

		pr_warn("problem creating link to mdp sysfs\n");



	kobject_uevent(&dev->kobj, KOBJ_ADD);

	pr_debug("vsync kobject_uevent(KOBJ_ADD)\n");