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OMAPDSS: DPI: always use DSI PLL if available 

We currently get the decision whether to use PRCM or DSI PLL clock for
DPI from the board file. This is not a good way to handle it, and it
won't work with device tree.

This patch changes DPI to always use DSI PLL if it's available.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2012-10-22 16:12:58 +03:00
parent 6061675b3f
commit 0e8276ef75
1 changed files with 37 additions and 27 deletions
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64
drivers/video/omap2/dss/dpi.c
View File

@ -49,28 +49,30 @@ static struct {
struct omap_dss_output output;
} dpi;
static struct platform_device *dpi_get_dsidev(enum omap_dss_clk_source clk)
static struct platform_device *dpi_get_dsidev(enum omap_channel channel)
{
int dsi_module;
dsi_module = clk == OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC ? 0 : 1;
return dsi_get_dsidev_from_id(dsi_module);
switch (channel) {
case OMAP_DSS_CHANNEL_LCD:
return dsi_get_dsidev_from_id(0);
case OMAP_DSS_CHANNEL_LCD2:
return dsi_get_dsidev_from_id(1);
default:
return NULL;
}
}
static bool dpi_use_dsi_pll(struct omap_dss_device *dssdev)
static enum omap_dss_clk_source dpi_get_alt_clk_src(enum omap_channel channel)
{
if (dssdev->clocks.dispc.dispc_fclk_src ==
OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC ||
dssdev->clocks.dispc.dispc_fclk_src ==
OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC ||
dssdev->clocks.dispc.channel.lcd_clk_src ==
OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC ||
dssdev->clocks.dispc.channel.lcd_clk_src ==
OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC)
return true;
else
return false;
switch (channel) {
case OMAP_DSS_CHANNEL_LCD:
return OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC;
case OMAP_DSS_CHANNEL_LCD2:
return OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC;
default:
/* this shouldn't happen */
WARN_ON(1);
return OMAP_DSS_CLK_SRC_FCK;
}
}
static int dpi_set_dsi_clk(struct omap_dss_device *dssdev,
@ -92,7 +94,7 @@ static int dpi_set_dsi_clk(struct omap_dss_device *dssdev,
return r;
dss_select_lcd_clk_source(mgr->id,
dssdev->clocks.dispc.channel.lcd_clk_src);
dpi_get_alt_clk_src(mgr->id));
dpi.mgr_config.clock_info = dispc_cinfo;
@ -385,6 +387,8 @@ static int __init dpi_verify_dsi_pll(struct platform_device *dsidev)
static int __init dpi_init_display(struct omap_dss_device *dssdev)
{
struct platform_device *dsidev;
DSSDBG("init_display\n");
if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
@ -401,17 +405,23 @@ static int __init dpi_init_display(struct omap_dss_device *dssdev)
dpi.vdds_dsi_reg = vdds_dsi;
}
if (dpi_use_dsi_pll(dssdev)) {
enum omap_dss_clk_source dispc_fclk_src =
dssdev->clocks.dispc.dispc_fclk_src;
dpi.dsidev = dpi_get_dsidev(dispc_fclk_src);
/*
* XXX We shouldn't need dssdev->channel for this. The dsi pll clock
* source for DPI is SoC integration detail, not something that should
* be configured in the dssdev
*/
dsidev = dpi_get_dsidev(dssdev->channel);
if (dpi_verify_dsi_pll(dpi.dsidev)) {
dpi.dsidev = NULL;
DSSWARN("DSI PLL not operational\n");
}
if (dpi_verify_dsi_pll(dsidev)) {
dsidev = NULL;
DSSWARN("DSI PLL not operational\n");
}
if (dsidev)
DSSDBG("using DSI PLL for DPI clock\n");
dpi.dsidev = dsidev;
return 0;
}