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video: tegra: don't enable display when mode is invalid

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Change-Id: I84a494f7c125ceadbe39a681a8ed7cfa244a6a2b
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Erik Gilling
2010-10-19 14:48:26 -07:00
parent 0b313530b3
commit 99bf62514f
1 changed files with 8 additions and 5 deletions
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13
drivers/video/tegra/dc/dc.c
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@@ -818,8 +818,11 @@ static void tegra_dc_init(struct tegra_dc *dc)
tegra_dc_program_mode(dc, &dc->mode);
}
static void _tegra_dc_enable(struct tegra_dc *dc)
static bool _tegra_dc_enable(struct tegra_dc *dc)
{
if (dc->mode.pclk == 0)
return false;
tegra_dc_io_start(dc);
if (dc->out && dc->out->enable)
@@ -837,16 +840,16 @@ static void _tegra_dc_enable(struct tegra_dc *dc)
/* force a full blending update */
dc->blend.z[0] = -1;
return true;
}
void tegra_dc_enable(struct tegra_dc *dc)
{
mutex_lock(&dc->lock);
if (!dc->enabled) {
_tegra_dc_enable(dc);
dc->enabled = true;
}
if (!dc->enabled)
dc->enabled = _tegra_dc_enable(dc);
mutex_unlock(&dc->lock);
}