[7] In 1992, he received the Andhra Pradesh state Raghupathi Venkaiah Award, and the civilian honour Padma Shri for his contribution to the field of arts.

[5][3][4] Viswanath's filmography is known for addressing the issues of caste, colour, disability, gender discrimination, misogyny, alcoholism and socio-economic challenges[11] through liberal arts medium.

[30] During his early career, Viswanath was associated with Adurthi Subba Rao on National Award-winning films such as Mooga Manasulu (1964) and Doctor Chakravarty (1964).

[3][4] Viswanath scripted Sudigundalu (1968), and directed works such as Aatma Gowravam (1965), O Seeta Katha (1974) and Jeevana Jyothi (1975) which garnered the state Nandi Awards, and were screened at the Asian and African film Festival at Tashkent.

In a recent study published in Journal of Dance, Movements & Spiritualities published by "Intellect Group" of the United Kingdom, C. S. H. N. Murthy, a media and film studies scholar from India, has demonstrated how Viswanath's filmography embraces a wide spectrum of characters that include mentally and physically challenged subjects as well, like the film Sarada (1973), which exploits a psychologically deranged woman, Swathi Muthyam (1986), which exploits an autistic man's humanism, Sirivennela (1986) which revels in situations between deaf and dumb characters, and Kalam Marindi (1972), which dwells on characters stuck in a caste-based society.

Situating the content in the broad arena of de-westernizing media studies, through immersive and culturally embedded perspectives, Murthy endeavoured to offer modern and postmodern dimensions in Viswanath's films.

[3][4] Viswanath has made many films dealing with a wide range of human and social issues: Saptapadi, Sirivennela, Sutradharulu, Subhalekha, Sruthilayalu, Subha Sankalpam, Aapadbandhavudu, Swayam Krushi, and Swarnakamalam have lead characters representing different strata of society, meticulously etched to suit the larger picture.

While Sutradharulu urges present-day society to recognize the need to adopt the ideals of non-violence, Swati Kiranam depicts the harm that can be caused by the basic instincts of envy and anger in a man, however accomplished he may be.

[3][4] In spite of the nature of these subjects, they are presented in a subtle manner with an imaginative storyline, with just the right amount of emphasis on the intended message.

He is a director with social-conscious mind and who believes cinema can bring out desirable changes in society if presented in a format liked by a cross-section of audience.

[35][36][37] Viswanath has also directed Hindi language films such as Sargam (1979), Kaamchor (1982), Shubh Kaamna (1983), Jaag Utha Insan (1984), Sur Sangam (1985), Sanjog (1985), Eeshwar (1989), Sangeet (1992) and Dhanwan (1993).

He essayed characters in Tamil works such as Kuruthipunal (1995), Mugavaree (1999), Kakkai Siraginilae (2000), Bagavathi (2002), Pudhiya Geethai (2003), Yaaradi Nee Mohini (2008), Rajapattai (2011), Singam II (2013), Lingaa (2014) and Uttama Villain (2015).