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video: tegra: fix dvfs for hdmi

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Change-Id: I4e6eef34a1e794e622bec10c9025b3820cd6ba8d
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Erik Gilling
2010-10-26 21:05:43 -07:00
parent 9319898210
commit e92acc7f00
1 changed files with 19 additions and 18 deletions
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37
drivers/video/tegra/dc/dc.c
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@@ -584,8 +584,25 @@ int tegra_dc_sync_windows(struct tegra_dc_win *windows[], int n)
}
EXPORT_SYMBOL(tegra_dc_sync_windows);
static unsigned long tegra_dc_pclk_round_rate(struct tegra_dc *dc, int pclk)
{
unsigned long rate;
unsigned long div;
rate = clk_get_rate(dc->clk);
div = DIV_ROUND_CLOSEST(rate * 2, pclk);
if (div < 2)
return 0;
return rate * 2 / div;
}
void tegra_dc_setup_clk(struct tegra_dc *dc, struct clk *clk)
{
int pclk;
if (dc->out->type == TEGRA_DC_OUT_HDMI) {
unsigned long rate;
struct clk *pll_d_out0_clk =
@@ -604,21 +621,10 @@ void tegra_dc_setup_clk(struct tegra_dc *dc, struct clk *clk)
if (clk_get_parent(clk) != pll_d_out0_clk)
clk_set_parent(clk, pll_d_out0_clk);
}
}
static unsigned long tegra_dc_pclk_round_rate(struct tegra_dc *dc, int pclk)
{
unsigned long rate;
unsigned long div;
pclk = tegra_dc_pclk_round_rate(dc, dc->mode.pclk);
tegra_dvfs_set_rate(clk, pclk);
rate = clk_get_rate(dc->clk);
div = DIV_ROUND_CLOSEST(rate * 2, pclk);
if (div < 2)
return 0;
return rate * 2 / div;
}
static int tegra_dc_program_mode(struct tegra_dc *dc, struct tegra_dc_mode *mode)
@@ -837,8 +843,6 @@ static void tegra_dc_init(struct tegra_dc *dc)
static bool _tegra_dc_enable(struct tegra_dc *dc)
{
int pclk;
if (dc->mode.pclk == 0)
return false;
@@ -849,9 +853,6 @@ static bool _tegra_dc_enable(struct tegra_dc *dc)
tegra_dc_setup_clk(dc, dc->clk);
pclk = tegra_dc_pclk_round_rate(dc, dc->mode.pclk);
tegra_dvfs_set_rate(dc->clk, pclk);
clk_enable(dc->clk);
enable_irq(dc->irq);