shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-10 21:07:02 +09:00
Code Issues Packages Projects Releases Wiki Activity

media: video: tegra: avp_svc: Force memory bus to full when avp is enabled

Browse Source 
Change-Id: I51382f58f296df939f99d60926ba97f0b4e04aed
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-12-07 18:47:38 -08:00
parent a1243f6783
commit 85f7f645fb
1 changed files with 23 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/media/video/tegra/avp/avp_svc.c
View File

@@ -82,6 +82,7 @@ struct avp_svc_info {
struct avp_clk clks[NUM_CLK_REQUESTS];
/* used for dvfs */
struct clk *sclk;
struct clk *emcclk;
struct mutex clk_lock;
@@ -352,6 +353,7 @@ static void do_svc_module_clock(struct avp_svc_info *avp_svc,
aclk = &avp_svc->clks[mod->clk_req];
if (msg->enable) {
if (aclk->refcnt++ == 0) {
clk_enable(avp_svc->emcclk);
clk_enable(avp_svc->sclk);
clk_enable(aclk->clk);
}
@@ -362,6 +364,7 @@ static void do_svc_module_clock(struct avp_svc_info *avp_svc,
} else if (--aclk->refcnt == 0) {
clk_disable(aclk->clk);
clk_disable(avp_svc->sclk);
clk_disable(avp_svc->emcclk);
}
}
mutex_unlock(&avp_svc->clk_lock);
@@ -631,8 +634,9 @@ void avp_svc_stop(struct avp_svc_info *avp_svc)
pr_info("%s: remote left clock '%s' on\n", __func__,
aclk->mod->name);
clk_disable(aclk->clk);
/* sclk was enabled once for every clock */
/* sclk/emcclk was enabled once for every clock */
clk_disable(avp_svc->sclk);
clk_disable(avp_svc->emcclk);
}
aclk->refcnt = 0;
}
@@ -682,6 +686,21 @@ struct avp_svc_info *avp_svc_init(struct platform_device *pdev,
ret = -ENOENT;
goto err_get_clks;
}
avp_svc->emcclk = clk_get(&pdev->dev, "emc");
if (IS_ERR(avp_svc->emcclk)) {
pr_err("avp_svc: Couldn't get emcclk for dvfs\n");
ret = -ENOENT;
goto err_get_clks;
}
/*
* The emc is a shared clock, it will be set to the highest
* requested rate from any user. Set the rate to ULONG_MAX to
* always request the max rate whenever this request is enabled
*/
clk_set_rate(avp_svc->emcclk, ULONG_MAX);
avp_svc->rpc_node = rpc_node;
mutex_init(&avp_svc->clk_lock);
@@ -694,6 +713,8 @@ err_get_clks:
clk_put(avp_svc->clks[i].clk);
if (!IS_ERR_OR_NULL(avp_svc->sclk))
clk_put(avp_svc->sclk);
if (!IS_ERR_OR_NULL(avp_svc->emcclk))
clk_put(avp_svc->emcclk);
err_alloc:
return ERR_PTR(ret);
}
@@ -705,6 +726,7 @@ void avp_svc_destroy(struct avp_svc_info *avp_svc)
for (i = 0; i < NUM_CLK_REQUESTS; i++)
clk_put(avp_svc->clks[i].clk);
clk_put(avp_svc->sclk);
clk_put(avp_svc->emcclk);
kfree(avp_svc);
}