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authorArchit Taneja <archit@ti.com>2011-09-08 07:45:11 (GMT)
committerTomi Valkeinen <tomi.valkeinen@ti.com>2011-09-30 13:17:26 (GMT)
commit79ad75f27b3096e163d3d8970bfd95b4c077dce7 (patch)
treee2dce46d727821784c93891db01dd38f88615a69 /drivers/video/omap2/dss
parentebdc52499f56ddb63318e7bcb5e80b774bb80264 (diff)
OMAPDSS: DISPC: Clean up scaling related clock and five tap calculations
Move DISPC scaling related code from dispc_ovl_setup() to a new function dispc_ovl_calc_scaling(). Use overlay caps to check if the overlay can scale or not. No functional changes are made. Signed-off-by: Archit Taneja <archit@ti.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2/dss')
-rw-r--r--drivers/video/omap2/dss/dispc.c131
1 files changed, 73 insertions, 58 deletions
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 829be3b..68a11e3 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -1686,14 +1686,74 @@ static unsigned long calc_fclk(enum omap_channel channel, u16 width,
return dispc_mgr_pclk_rate(channel) * vf * hf;
}
+static int dispc_ovl_calc_scaling(enum omap_plane plane,
+ enum omap_channel channel, u16 width, u16 height,
+ u16 out_width, u16 out_height,
+ enum omap_color_mode color_mode, bool *five_taps)
+{
+ struct omap_overlay *ovl = omap_dss_get_overlay(plane);
+ const int maxdownscale = cpu_is_omap34xx() ? 4 : 2;
+ unsigned long fclk = 0;
+
+ if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
+ if (width != out_width || height != out_height)
+ return -EINVAL;
+ else
+ return 0;
+ }
+
+ if (out_width < width / maxdownscale ||
+ out_width > width * 8)
+ return -EINVAL;
+
+ if (out_height < height / maxdownscale ||
+ out_height > height * 8)
+ return -EINVAL;
+
+ /* Must use 5-tap filter? */
+ *five_taps = height > out_height * 2;
+
+ if (!*five_taps) {
+ fclk = calc_fclk(channel, width, height, out_width,
+ out_height);
+
+ /* Try 5-tap filter if 3-tap fclk is too high */
+ if (cpu_is_omap34xx() && height > out_height &&
+ fclk > dispc_fclk_rate())
+ *five_taps = true;
+ }
+
+ if (width > (2048 >> *five_taps)) {
+ DSSERR("failed to set up scaling, fclk too low\n");
+ return -EINVAL;
+ }
+
+ if (*five_taps)
+ fclk = calc_fclk_five_taps(channel, width, height,
+ out_width, out_height, color_mode);
+
+ DSSDBG("required fclk rate = %lu Hz\n", fclk);
+ DSSDBG("current fclk rate = %lu Hz\n", dispc_fclk_rate());
+
+ if (!fclk || fclk > dispc_fclk_rate()) {
+ DSSERR("failed to set up scaling, "
+ "required fclk rate = %lu Hz, "
+ "current fclk rate = %lu Hz\n",
+ fclk, dispc_fclk_rate());
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
int dispc_ovl_setup(enum omap_plane plane, struct omap_overlay_info *oi,
bool ilace, enum omap_channel channel, bool replication,
u32 fifo_low, u32 fifo_high)
{
- const int maxdownscale = cpu_is_omap34xx() ? 4 : 2;
- bool five_taps = 0;
+ struct omap_overlay *ovl = omap_dss_get_overlay(plane);
+ bool five_taps = false;
bool fieldmode = 0;
- int cconv = 0;
+ int r, cconv = 0;
unsigned offset0, offset1;
s32 row_inc;
s32 pix_inc;
@@ -1727,61 +1787,16 @@ int dispc_ovl_setup(enum omap_plane plane, struct omap_overlay_info *oi,
if (!dss_feat_color_mode_supported(plane, oi->color_mode))
return -EINVAL;
- if (plane == OMAP_DSS_GFX) {
- if (oi->width != oi->out_width || oi->height != oi->out_height)
- return -EINVAL;
- } else {
- /* video plane */
-
- unsigned long fclk = 0;
-
- if (oi->out_width < oi->width / maxdownscale ||
- oi->out_width > oi->width * 8)
- return -EINVAL;
-
- if (oi->out_height < oi->height / maxdownscale ||
- oi->out_height > oi->height * 8)
- return -EINVAL;
-
- if (oi->color_mode == OMAP_DSS_COLOR_YUV2 ||
- oi->color_mode == OMAP_DSS_COLOR_UYVY ||
- oi->color_mode == OMAP_DSS_COLOR_NV12)
- cconv = 1;
-
- /* Must use 5-tap filter? */
- five_taps = oi->height > oi->out_height * 2;
-
- if (!five_taps) {
- fclk = calc_fclk(channel, oi->width, oi->height,
- oi->out_width, oi->out_height);
-
- /* Try 5-tap filter if 3-tap fclk is too high */
- if (cpu_is_omap34xx() && oi->height > oi->out_height &&
- fclk > dispc_fclk_rate())
- five_taps = true;
- }
-
- if (oi->width > (2048 >> five_taps)) {
- DSSERR("failed to set up scaling, fclk too low\n");
- return -EINVAL;
- }
-
- if (five_taps)
- fclk = calc_fclk_five_taps(channel, oi->width,
- oi->height, oi->out_width,
- oi->out_height, oi->color_mode);
-
- DSSDBG("required fclk rate = %lu Hz\n", fclk);
- DSSDBG("current fclk rate = %lu Hz\n", dispc_fclk_rate());
+ r = dispc_ovl_calc_scaling(plane, channel, oi->width, oi->height,
+ oi->out_width, oi->out_height, oi->color_mode,
+ &five_taps);
+ if (r)
+ return r;
- if (!fclk || fclk > dispc_fclk_rate()) {
- DSSERR("failed to set up scaling, "
- "required fclk rate = %lu Hz, "
- "current fclk rate = %lu Hz\n",
- fclk, dispc_fclk_rate());
- return -EINVAL;
- }
- }
+ if (oi->color_mode == OMAP_DSS_COLOR_YUV2 ||
+ oi->color_mode == OMAP_DSS_COLOR_UYVY ||
+ oi->color_mode == OMAP_DSS_COLOR_NV12)
+ cconv = 1;
if (ilace && !fieldmode) {
/*
@@ -1836,7 +1851,7 @@ int dispc_ovl_setup(enum omap_plane plane, struct omap_overlay_info *oi,
dispc_ovl_set_pic_size(plane, oi->width, oi->height);
- if (plane != OMAP_DSS_GFX) {
+ if (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) {
dispc_ovl_set_scaling(plane, oi->width, oi->height,
oi->out_width, oi->out_height,
ilace, five_taps, fieldmode,

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