diff options
| author | Archit Taneja <archit@ti.com> | 2011-06-22 20:39:39 +0100 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-06-22 20:39:39 +0100 |
| commit | 363cd3f3aef9459fa53de959a90ca9ef35d2a851 (patch) | |
| tree | 6275a63d73afe385798927fd1b38c3de1ff34f72 | |
| parent | 5126d855c8cf18cd2a77bce21b204c0936b0cd17 (diff) | |
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: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
| -rw-r--r-- | drivers/video/omap2/dss/dsi.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index 784677d088f..345757cfcbe 100644 --- a/drivers/video/omap2/dss/dsi.c +++ b/drivers/video/omap2/dss/dsi.c @@ -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); |