Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0c65622b authored by Archit Taneja's avatar Archit Taneja Committed by Tomi Valkeinen
Browse files

OMAP: DSS2: DSI: Get line buffer size from DSI_GNQ register 



The line buffer sizes vary across DSI modules, create a function
dsi_get_line_buf_size() using DSI_GNQ register to get the size of
line buffer used for the DISPC video port data.

Signed-off-by: default avatarArchit Taneja <archit@ti.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 75d7247c

drivers/video/omap2/dss/dsi.c

+32 −4
Original line number Diff line number Diff line
@@ -2036,6 +2036,37 @@ static inline int dsi_get_num_data_lanes_dssdev(struct omap_dss_device *dssdev) 
	return num_data_lanes;

}



static unsigned dsi_get_line_buf_size(struct platform_device *dsidev)

{

	int val;



	/* line buffer on OMAP3 is 1024 x 24bits */

	/* XXX: for some reason using full buffer size causes

	 * considerable TX slowdown with update sizes that fill the

	 * whole buffer */

	if (!dss_has_feature(FEAT_DSI_GNQ))

		return 1023 * 3;



	val = REG_GET(dsidev, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */



	switch (val) {

	case 1:

		return 512 * 3;		/* 512x24 bits */

	case 2:

		return 682 * 3;		/* 682x24 bits */

	case 3:

		return 853 * 3;		/* 853x24 bits */

	case 4:

		return 1024 * 3;	/* 1024x24 bits */

	case 5:

		return 1194 * 3;	/* 1194x24 bits */

	case 6:

		return 1365 * 3;	/* 1365x24 bits */

	default:

		BUG();

	}

}



static void dsi_set_lane_config(struct omap_dss_device *dssdev)

{

	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
@@ -3771,10 +3802,7 @@ static void dsi_update_screen_dispc(struct omap_dss_device *dssdev, 
	u32 l;

	int r;

	const unsigned channel = dsi->update_channel;

	/* line buffer is 1024 x 24bits */

	/* XXX: for some reason using full buffer size causes considerable TX

	 * slowdown with update sizes that fill the whole buffer */

	const unsigned line_buf_size = 1023 * 3;

	const unsigned line_buf_size = dsi_get_line_buf_size(dsidev);



	DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",

			x, y, w, h);