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OMAPDSS: DSS: Cleanup cpu_is_xxxx checks

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All the cpu_is checks have been moved to dss_init_features function providing a
much more generic and cleaner interface. The OMAP version and revision specific
initializations in various functions are cleaned and the necessary data are
moved to dss_features structure which is local to dss.c.

Signed-off-by: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Chandrabhanu Mahapatra 2012-07-11 18:36:18 +05:30 committed by Tomi Valkeinen
parent ba1bc5bb1d
commit 185bae1095
1 changed files with 79 additions and 41 deletions
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120
drivers/video/omap2/dss/dss.c
View file

@ -31,6 +31,7 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/gfp.h>
#include <video/omapdss.h>
@ -65,6 +66,12 @@ struct dss_reg {
static int dss_runtime_get(void);
static void dss_runtime_put(void);
struct dss_features {
u8 fck_div_max;
u8 dss_fck_multiplier;
const char *clk_name;
};
static struct {
struct platform_device *pdev;
void __iomem *base;
@ -83,6 +90,8 @@ static struct {
bool ctx_valid;
u32 ctx[DSS_SZ_REGS / sizeof(u32)];
const struct dss_features *feat;
} dss;
static const char * const dss_generic_clk_source_names[] = {
@ -91,6 +100,30 @@ static const char * const dss_generic_clk_source_names[] = {
[OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK",
};
static const struct dss_features omap24xx_dss_feats __initconst = {
.fck_div_max = 16,
.dss_fck_multiplier = 2,
.clk_name = NULL,
};
static const struct dss_features omap34xx_dss_feats __initconst = {
.fck_div_max = 16,
.dss_fck_multiplier = 2,
.clk_name = "dpll4_m4_ck",
};
static const struct dss_features omap3630_dss_feats __initconst = {
.fck_div_max = 32,
.dss_fck_multiplier = 1,
.clk_name = "dpll4_m4_ck",
};
static const struct dss_features omap44xx_dss_feats __initconst = {
.fck_div_max = 32,
.dss_fck_multiplier = 1,
.clk_name = "dpll_per_m5x2_ck",
};
static inline void dss_write_reg(const struct dss_reg idx, u32 val)
{
__raw_writel(val, dss.base + idx.idx);
@ -236,7 +269,6 @@ const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src)
return dss_generic_clk_source_names[clk_src];
}
void dss_dump_clocks(struct seq_file *s)
{
unsigned long dpll4_ck_rate;
@ -259,18 +291,10 @@ void dss_dump_clocks(struct seq_file *s)
seq_printf(s, "dpll4_ck %lu\n", dpll4_ck_rate);
if (cpu_is_omap3630() || cpu_is_omap44xx())
seq_printf(s, "%s (%s) = %lu / %lu = %lu\n",
fclk_name, fclk_real_name,
dpll4_ck_rate,
dpll4_ck_rate / dpll4_m4_ck_rate,
fclk_rate);
else
seq_printf(s, "%s (%s) = %lu / %lu * 2 = %lu\n",
fclk_name, fclk_real_name,
dpll4_ck_rate,
dpll4_ck_rate / dpll4_m4_ck_rate,
fclk_rate);
seq_printf(s, "%s (%s) = %lu / %lu * %d = %lu\n",
fclk_name, fclk_real_name, dpll4_ck_rate,
dpll4_ck_rate / dpll4_m4_ck_rate,
dss.feat->dss_fck_multiplier, fclk_rate);
} else {
seq_printf(s, "%s (%s) = %lu\n",
fclk_name, fclk_real_name,
@ -470,7 +494,7 @@ int dss_calc_clock_div(unsigned long req_pck, struct dss_clock_info *dss_cinfo,
unsigned long fck, max_dss_fck;
u16 fck_div, fck_div_max = 16;
u16 fck_div;
int match = 0;
int min_fck_per_pck;
@ -480,9 +504,8 @@ int dss_calc_clock_div(unsigned long req_pck, struct dss_clock_info *dss_cinfo,
max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
fck = clk_get_rate(dss.dss_clk);
if (req_pck == dss.cache_req_pck &&
((cpu_is_omap34xx() && prate == dss.cache_prate) ||
dss.cache_dss_cinfo.fck == fck)) {
if (req_pck == dss.cache_req_pck && prate == dss.cache_prate &&
dss.cache_dss_cinfo.fck == fck) {
DSSDBG("dispc clock info found from cache.\n");
*dss_cinfo = dss.cache_dss_cinfo;
*dispc_cinfo = dss.cache_dispc_cinfo;
@ -519,16 +542,10 @@ retry:
goto found;
} else {
if (cpu_is_omap3630() || cpu_is_omap44xx())
fck_div_max = 32;
for (fck_div = fck_div_max; fck_div > 0; --fck_div) {
for (fck_div = dss.feat->fck_div_max; fck_div > 0; --fck_div) {
struct dispc_clock_info cur_dispc;
if (fck_div_max == 32)
fck = prate / fck_div;
else
fck = prate / fck_div * 2;
fck = prate / fck_div * dss.feat->dss_fck_multiplier;
if (fck > max_dss_fck)
continue;
@ -645,22 +662,11 @@ static int dss_get_clocks(void)
dss.dss_clk = clk;
if (cpu_is_omap34xx()) {
clk = clk_get(NULL, "dpll4_m4_ck");
if (IS_ERR(clk)) {
DSSERR("Failed to get dpll4_m4_ck\n");
r = PTR_ERR(clk);
goto err;
}
} else if (cpu_is_omap44xx()) {
clk = clk_get(NULL, "dpll_per_m5x2_ck");
if (IS_ERR(clk)) {
DSSERR("Failed to get dpll_per_m5x2_ck\n");
r = PTR_ERR(clk);
goto err;
}
} else { /* omap24xx */
clk = NULL;
clk = clk_get(NULL, dss.feat->clk_name);
if (IS_ERR(clk)) {
DSSERR("Failed to get %s\n", dss.feat->clk_name);
r = PTR_ERR(clk);
goto err;
}
dss.dpll4_m4_ck = clk;
@ -716,6 +722,34 @@ void dss_debug_dump_clocks(struct seq_file *s)
}
#endif
static int __init dss_init_features(struct device *dev)
{
const struct dss_features *src;
struct dss_features *dst;
dst = devm_kzalloc(dev, sizeof(*dst), GFP_KERNEL);
if (!dst) {
dev_err(dev, "Failed to allocate local DSS Features\n");
return -ENOMEM;
}
if (cpu_is_omap24xx())
src = &omap24xx_dss_feats;
else if (cpu_is_omap34xx())
src = &omap34xx_dss_feats;
else if (cpu_is_omap3630())
src = &omap3630_dss_feats;
else if (cpu_is_omap44xx())
src = &omap44xx_dss_feats;
else
return -ENODEV;
memcpy(dst, src, sizeof(*dst));
dss.feat = dst;
return 0;
}
/* DSS HW IP initialisation */
static int __init omap_dsshw_probe(struct platform_device *pdev)
{
@ -725,6 +759,10 @@ static int __init omap_dsshw_probe(struct platform_device *pdev)
dss.pdev = pdev;
r = dss_init_features(&dss.pdev->dev);
if (r)
return r;
dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
if (!dss_mem) {
DSSERR("can't get IORESOURCE_MEM DSS\n");