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OMAPDSS: SDI: use new clock calculation code

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Use the new clock calculation code in the SDI driver.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2013-03-05 17:06:26 +02:00
parent 72658f0716
commit 36816faadf
1 changed files with 67 additions and 1 deletions
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68
drivers/video/omap2/dss/sdi.c
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@ -41,6 +41,72 @@ static struct {
struct omap_dss_output output;
} sdi;
struct sdi_clk_calc_ctx {
unsigned long pck_min, pck_max;
struct dss_clock_info dss_cinfo;
struct dispc_clock_info dispc_cinfo;
};
static bool dpi_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
unsigned long pck, void *data)
{
struct sdi_clk_calc_ctx *ctx = data;
ctx->dispc_cinfo.lck_div = lckd;
ctx->dispc_cinfo.pck_div = pckd;
ctx->dispc_cinfo.lck = lck;
ctx->dispc_cinfo.pck = pck;
return true;
}
static bool dpi_calc_dss_cb(int fckd, unsigned long fck, void *data)
{
struct sdi_clk_calc_ctx *ctx = data;
ctx->dss_cinfo.fck = fck;
ctx->dss_cinfo.fck_div = fckd;
return dispc_div_calc(fck, ctx->pck_min, ctx->pck_max,
dpi_calc_dispc_cb, ctx);
}
static int sdi_calc_clock_div(unsigned long pclk,
struct dss_clock_info *dss_cinfo,
struct dispc_clock_info *dispc_cinfo)
{
int i;
struct sdi_clk_calc_ctx ctx;
/*
* DSS fclk gives us very few possibilities, so finding a good pixel
* clock may not be possible. We try multiple times to find the clock,
* each time widening the pixel clock range we look for, up to
* +/- 1MHz.
*/
for (i = 0; i < 10; ++i) {
bool ok;
memset(&ctx, 0, sizeof(ctx));
if (pclk > 1000 * i * i * i)
ctx.pck_min = max(pclk - 1000 * i * i * i, 0lu);
else
ctx.pck_min = 0;
ctx.pck_max = pclk + 1000 * i * i * i;
ok = dss_div_calc(ctx.pck_min, dpi_calc_dss_cb, &ctx);
if (ok) {
*dss_cinfo = ctx.dss_cinfo;
*dispc_cinfo = ctx.dispc_cinfo;
return 0;
}
}
return -EINVAL;
}
static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
{
struct omap_overlay_manager *mgr = dssdev->output->manager;
@ -88,7 +154,7 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
r = dss_calc_clock_div(t->pixel_clock * 1000, &dss_cinfo, &dispc_cinfo);
r = sdi_calc_clock_div(t->pixel_clock * 1000, &dss_cinfo, &dispc_cinfo);
if (r)
goto err_calc_clock_div;