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Commit 0e8276ef authored by Tomi Valkeinen's avatar Tomi Valkeinen
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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: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 6061675b

drivers/video/omap2/dss/dpi.c

+37 −27
Original line number Diff line number Diff line
@@ -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) &&
@@ -401,16 +405,22 @@ 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;

	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;

}