In Jain dharma, there is no scriptural requirement to put a photo of the deceased on the wall. This is a social/family custom, not a religious duty.

From a Jain point of view:

• The soul (jiv) has already moved on according to its karma;

keeping too much focus on the body or photo can increase raag–dvesh (attachment and sorrow).

• Quiet remembrance, Navkār Mantra, svādhyāy, pratikraman, and doing dān / jiv-dayā in their memory are more in line with Jain teachings than external display or emotional show.

So, practically:

• If a simple photo is kept just for sober remembrance, without crying, rituals to the photo, lighting agarbatti to it, etc., it is generally acceptable as a personal choice.
• If the photo leads to constant grief, clinging, or ritual worship, it goes against the Jain ideal of samata (equanimity) and vairāgya (detachment).

In short: You are not religiously obliged to put a photo of the deceased on the wall. If it helps you remember them peacefully and inspires good karma (prayers, charity, right conduct), it may be kept; if it increases sorrow and attachment, it is better avoided.