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drm/tilcdc: split reset to a separate function 

Split reset to a separate function and use usleep_range(250, 1000)
instead of msleep(1) to to keep the reset bit on long enough.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
[Added description to the patch, changed mdelay(500) to usleep_range(250, 1000)]
Signed-off-by: Jyri Sarha <jsarha@ti.com>
This commit is contained in:
Tomi Valkeinen 2015-10-20 09:37:27 +03:00 committed by Jyri Sarha
parent 1aea1e79db
commit 2efec4f306
1 changed files with 14 additions and 7 deletions
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21
drivers/gpu/drm/tilcdc/tilcdc_crtc.c
View File

@ -112,17 +112,24 @@ static void update_scanout(struct drm_crtc *crtc)
}
}
static void start(struct drm_crtc *crtc)
static void reset(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct tilcdc_drm_private *priv = dev->dev_private;
if (priv->rev == 2) {
tilcdc_set(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
msleep(1);
tilcdc_clear(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
msleep(1);
}
if (priv->rev != 2)
return;
tilcdc_set(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
usleep_range(250, 1000);
tilcdc_clear(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
}
static void start(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
reset(crtc);
tilcdc_set(dev, LCDC_DMA_CTRL_REG, LCDC_DUAL_FRAME_BUFFER_ENABLE);
tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_PALETTE_LOAD_MODE(DATA_ONLY));