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video: tegra: dc: Force memory bus to full when display is enabled

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Change-Id: Ia9dfef275561fdb3b6f0a37ae0535684a60cb63e
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-11-22 18:54:53 -08:00
parent 94ef9a634f
commit a1243f6783
2 changed files with 23 additions and 1 deletions
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23
drivers/video/tegra/dc/dc.c
View File

@@ -967,6 +967,7 @@ static bool _tegra_dc_enable(struct tegra_dc *dc)
tegra_dc_setup_clk(dc, dc->clk);
clk_enable(dc->clk);
clk_enable(dc->emc_clk);
enable_irq(dc->irq);
tegra_dc_init(dc);
@@ -997,6 +998,7 @@ static void _tegra_dc_disable(struct tegra_dc *dc)
if (dc->out_ops && dc->out_ops->disable)
dc->out_ops->disable(dc);
clk_disable(dc->emc_clk);
clk_disable(dc->clk);
tegra_dvfs_set_rate(dc->clk, 0);
@@ -1029,6 +1031,7 @@ static int tegra_dc_probe(struct nvhost_device *ndev)
{
struct tegra_dc *dc;
struct clk *clk;
struct clk *emc_clk;
struct resource *res;
struct resource *base_res;
struct resource *fb_mem = NULL;
@@ -1085,7 +1088,22 @@ static int tegra_dc_probe(struct nvhost_device *ndev)
goto err_iounmap_reg;
}
emc_clk = clk_get(&ndev->dev, "emc");
if (IS_ERR_OR_NULL(emc_clk)) {
dev_err(&ndev->dev, "can't get emc clock\n");
ret = -ENOENT;
goto err_put_clk;
}
/*
* 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(emc_clk, ULONG_MAX);
dc->clk = clk;
dc->emc_clk = emc_clk;
dc->base_res = base_res;
dc->base = base;
dc->irq = irq;
@@ -1108,7 +1126,7 @@ static int tegra_dc_probe(struct nvhost_device *ndev)
dev_name(&ndev->dev), dc)) {
dev_err(&ndev->dev, "request_irq %d failed\n", irq);
ret = -EBUSY;
goto err_put_clk;
goto err_put_emc_clk;
}
/* hack to ballence enable_irq calls in _tegra_dc_enable() */
@@ -1158,6 +1176,8 @@ static int tegra_dc_probe(struct nvhost_device *ndev)
err_free_irq:
free_irq(irq, dc);
err_put_emc_clk:
clk_put(emc_clk);
err_put_clk:
clk_put(clk);
err_iounmap_reg:
@@ -1187,6 +1207,7 @@ static int tegra_dc_remove(struct nvhost_device *ndev)
_tegra_dc_disable(dc);
free_irq(dc->irq, dc);
clk_put(dc->emc_clk);
clk_put(dc->clk);
iounmap(dc->base);
if (dc->fb_mem)

1
drivers/video/tegra/dc/dc_priv.h
View File

@@ -60,6 +60,7 @@ struct tegra_dc {
int irq;
struct clk *clk;
struct clk *emc_clk;
bool enabled;