On Tue, Aug 21, 2012 at 4:01 PM, Tomi Valkeinen <tomi.valkeinen@xxxxxx> wrote:
> On Mon, 2012-08-20 at 18:52 +0530, Chandrabhanu Mahapatra wrote:
>> All the cpu_is checks have been moved to dispc_init_features function providing
>> a much more generic and cleaner interface. The OMAP version and revision
>> specific functions and data are initialized by dispc_features structure which is
>> local to dispc.c.
>>
>> Signed-off-by: Chandrabhanu Mahapatra <cmahapatra@xxxxxx>
>> ---
>> drivers/video/omap2/dss/dispc.c | 433 +++++++++++++++++++++++++--------------
>> 1 file changed, 278 insertions(+), 155 deletions(-)
>>
>> diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
>> index ff52702..3fad33a 100644
>> --- a/drivers/video/omap2/dss/dispc.c
>> +++ b/drivers/video/omap2/dss/dispc.c
>> @@ -81,6 +81,23 @@ struct dispc_irq_stats {
>> unsigned irqs[32];
>> };
>>
>> +struct dispc_features {
>> + int hp_max;
>> + int vp_max;
>> + int sw_max;
>> + int sw_start;
>> + int fp_start;
>> + int bp_start;
>
> Here you could use a bit smaller datatype. u16 should probably be more
> than enough.
>
After looking at the values that these variables take I think hp_max,
vp_max and sw_max can be u16 and the rest three sw_start, fp_start and
bp_start can be u8.
>> +static int __init dispc_init_features(struct device *dev)
>> +{
>> + struct dispc_features *feat = devm_kzalloc(dev, sizeof(*feat),
>> + GFP_KERNEL);
>> + if (!feat) {
>> + dev_err(dev, "Failed to allocate DISPC Features\n");
>> + return -ENOMEM;
>> + }
>> +
>> + if (cpu_is_omap24xx()) {
>> + memcpy(feat, &omap24xx_dispc_feats, sizeof(*feat));
>> + } else if (cpu_is_omap34xx()) {
>> + if (omap_rev() < OMAP3430_REV_ES3_0)
>> + memcpy(feat, &omap34xx_rev1_0_dispc_feats,
>> + sizeof(*feat));
>> + else
>> + memcpy(feat, &omap34xx_rev3_0_dispc_feats,
>> + sizeof(*feat));
>> + } else if (cpu_is_omap44xx()) {
>> + memcpy(feat, &omap44xx_dispc_feats, sizeof(*feat));
>> + } else {
>> + return -ENODEV;
>> + }
>> +
>> + dispc.feat = feat;
>> +
>> + return 0;
>> +}
>
> This becomes much cleaner with something like the following (same could
> be used in dss.c also):
>
> const struct dispc_features *src;
> struct dispc_features *dst;
>
> dst = devm_kzalloc(dev, sizeof(*dst), GFP_KERNEL);
> if (!dsst) {
> dev_err(dev, "Failed to allocate DISPC Features\n");
> return -ENOMEM;
> }
>
> if (cpu_is_omap24xx()) {
> src = &omap24xx_dispc_feats;
> } else if (cpu_is_omap34xx()) {
> if (omap_rev() < OMAP3430_REV_ES3_0)
> src = &omap34xx_rev1_0_dispc_feats;
> else
> src = &omap34xx_rev3_0_dispc_feats;
> } else if (cpu_is_omap44xx()) {
> src = &omap44xx_dispc_feats;
> } else {
> return -ENODEV;
> }
>
> memcpy(dst, src, sizeof(*dst));
>
> dispc.feat = dst;
>
> Tomi
>
ok, looks cleaner.
--
Chandrabhanu Mahapatra
Texas Instruments India Pvt. Ltd.
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