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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>
This commit is contained in:
Archit Taneja 2011-09-08 13:15:11 +05:30 committed by Tomi Valkeinen
parent ebdc52499f
commit 79ad75f27b
1 changed files with 73 additions and 58 deletions
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131
drivers/video/omap2/dss/dispc.c
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@ -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 */
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;
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());
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,