libcamera: software_isp: lut: Make gamma from lut.cpp available in debayer params

Provide the gamma used in IPA to Bayer parameters. We will pass Gamma into
the shader via a uniform and can then tweak that value from outside at
will.

Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/simple/algorithms/lut.cpp

@@ -147,6 +147,8 @@ void Lut::prepare(IPAContext &context,
 			params->gammaLut[i] = gammaTable[i / div];
 		}
 	}
+
+	params->gamma = context.configuration.gamma;
 }
 
 void Lut::process([[maybe_unused]] IPAContext &context,