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drm/omap: cleanup DPI clock source handling 

We can clean up the DPI driver's clock source handling by using the
dss_clk_source instead of only a dss_pll pointer.

This will also make it possible to use additional clock sources, like
PLL1_3 or HDMI_PLL, which the code did not support earlier.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2016-05-17 16:08:54 +03:00
parent ef03b40126
commit 331e607845
1 changed files with 18 additions and 30 deletions
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48
drivers/gpu/drm/omapdrm/dss/dpi.c
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@ -45,6 +45,7 @@ struct dpi_data {
struct platform_device *pdev;
struct regulator *vdds_dsi_reg;
enum dss_clk_source clk_src;
struct dss_pll *pll;
struct mutex lock;
@ -69,7 +70,7 @@ static struct dpi_data *dpi_get_data_from_pdev(struct platform_device *pdev)
return dev_get_drvdata(&pdev->dev);
}
static struct dss_pll *dpi_get_pll(enum omap_channel channel)
static enum dss_clk_source dpi_get_clk_src(enum omap_channel channel)
{
/*
* XXX we can't currently use DSI PLL for DPI with OMAP3, as the DSI PLL
@ -83,58 +84,44 @@ static struct dss_pll *dpi_get_pll(enum omap_channel channel)
case OMAPDSS_VER_OMAP3630:
case OMAPDSS_VER_AM35xx:
case OMAPDSS_VER_AM43xx:
return NULL;
return DSS_CLK_SRC_FCK;
case OMAPDSS_VER_OMAP4430_ES1:
case OMAPDSS_VER_OMAP4430_ES2:
case OMAPDSS_VER_OMAP4:
switch (channel) {
case OMAP_DSS_CHANNEL_LCD:
return dss_pll_find("dsi0");
return DSS_CLK_SRC_PLL1_1;
case OMAP_DSS_CHANNEL_LCD2:
return dss_pll_find("dsi1");
return DSS_CLK_SRC_PLL2_1;
default:
return NULL;
return DSS_CLK_SRC_FCK;
}
case OMAPDSS_VER_OMAP5:
switch (channel) {
case OMAP_DSS_CHANNEL_LCD:
return dss_pll_find("dsi0");
return DSS_CLK_SRC_PLL1_1;
case OMAP_DSS_CHANNEL_LCD3:
return dss_pll_find("dsi1");
return DSS_CLK_SRC_PLL2_1;
case OMAP_DSS_CHANNEL_LCD2:
default:
return NULL;
return DSS_CLK_SRC_FCK;
}
case OMAPDSS_VER_DRA7xx:
switch (channel) {
case OMAP_DSS_CHANNEL_LCD:
return DSS_CLK_SRC_PLL1_1;
case OMAP_DSS_CHANNEL_LCD2:
return dss_pll_find("video0");
return DSS_CLK_SRC_PLL1_3;
case OMAP_DSS_CHANNEL_LCD3:
return dss_pll_find("video1");
return DSS_CLK_SRC_PLL2_1;
default:
return NULL;
return DSS_CLK_SRC_FCK;
}
default:
return NULL;
}
}
static enum dss_clk_source dpi_get_alt_clk_src(enum omap_channel channel)
{
switch (channel) {
case OMAP_DSS_CHANNEL_LCD:
return DSS_CLK_SRC_PLL1_1;
case OMAP_DSS_CHANNEL_LCD2:
return DSS_CLK_SRC_PLL2_1;
case OMAP_DSS_CHANNEL_LCD3:
return DSS_CLK_SRC_PLL2_1;
default:
/* this shouldn't happen */
WARN_ON(1);
return DSS_CLK_SRC_FCK;
}
}
@ -295,8 +282,7 @@ static int dpi_set_dsi_clk(struct dpi_data *dpi, enum omap_channel channel,
if (r)
return r;
dss_select_lcd_clk_source(channel,
dpi_get_alt_clk_src(channel));
dss_select_lcd_clk_source(channel, dpi->clk_src);
dpi->mgr_config.clock_info = ctx.dispc_cinfo;
@ -602,7 +588,9 @@ static void dpi_init_pll(struct dpi_data *dpi)
if (dpi->pll)
return;
pll = dpi_get_pll(dpi->output.dispc_channel);
dpi->clk_src = dpi_get_clk_src(dpi->output.dispc_channel);
pll = dss_pll_find_by_src(dpi->clk_src);
if (!pll)
return;