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drm/omap: add PLL helper funcs

Browse Source 
Add two PLL helper functions:

dss_pll_find_by_src() which returns the dss_pll for the given
dss_clk_source.

dss_pll_get_clkout_idx_for_src() which returns the clkout index for the
given dss_clk_source.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2016-05-18 12:42:09 +03:00
parent c63b1ec090
commit 5670bd7219
2 changed files with 55 additions and 0 deletions
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2
drivers/gpu/drm/omapdrm/dss/dss.h
View File

@ -428,6 +428,8 @@ typedef bool (*dss_hsdiv_calc_func)(int m_dispc, unsigned long dispc,
int dss_pll_register(struct dss_pll *pll);
void dss_pll_unregister(struct dss_pll *pll);
struct dss_pll *dss_pll_find(const char *name);
struct dss_pll *dss_pll_find_by_src(enum dss_clk_source src);
unsigned dss_pll_get_clkout_idx_for_src(enum dss_clk_source src);
int dss_pll_enable(struct dss_pll *pll);
void dss_pll_disable(struct dss_pll *pll);
int dss_pll_set_config(struct dss_pll *pll,

53
drivers/gpu/drm/omapdrm/dss/pll.c
View File

@ -76,6 +76,59 @@ struct dss_pll *dss_pll_find(const char *name)
return NULL;
}
struct dss_pll *dss_pll_find_by_src(enum dss_clk_source src)
{
struct dss_pll *pll;
switch (src) {
default:
case DSS_CLK_SRC_FCK:
return NULL;
case DSS_CLK_SRC_HDMI_PLL:
return dss_pll_find("hdmi");
case DSS_CLK_SRC_PLL1_1:
case DSS_CLK_SRC_PLL1_2:
case DSS_CLK_SRC_PLL1_3:
pll = dss_pll_find("dsi0");
if (!pll)
pll = dss_pll_find("video0");
return pll;
case DSS_CLK_SRC_PLL2_1:
case DSS_CLK_SRC_PLL2_2:
case DSS_CLK_SRC_PLL2_3:
pll = dss_pll_find("dsi1");
if (!pll)
pll = dss_pll_find("video1");
return pll;
}
}
unsigned dss_pll_get_clkout_idx_for_src(enum dss_clk_source src)
{
switch (src) {
case DSS_CLK_SRC_HDMI_PLL:
return 0;
case DSS_CLK_SRC_PLL1_1:
case DSS_CLK_SRC_PLL2_1:
return 0;
case DSS_CLK_SRC_PLL1_2:
case DSS_CLK_SRC_PLL2_2:
return 1;
case DSS_CLK_SRC_PLL1_3:
case DSS_CLK_SRC_PLL2_3:
return 2;
default:
return 0;
}
}
int dss_pll_enable(struct dss_pll *pll)
{
int r;