Document HSIC hack

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 14 insertions, 3 deletions

diff --git a/NLnet/porting_replicant_to_android9/porting_replicant_to_android9.tex b/NLnet/porting_replicant_to_android9/porting_replicant_to_android9.tex
index a690c17..d3e19ab 100644
--- a/NLnet/porting_replicant_to_android9/porting_replicant_to_android9.tex
+++ b/NLnet/porting_replicant_to_android9/porting_replicant_to_android9.tex
@@ -107,10 +107,18 @@
   \hline
   70H &
   \begin{itemize}
-  \item{port and cleanup the the Galaxy SIII (i9300) modem Linux driver from 4.16 to 5.0 or later}
+  \item{port and cleanup the the Galaxy SIII (i9300) modem Linux driver to Linux 5.0 or later}
   \end{itemize} &
-  The driver to port is available at \url{https://github.com/fourkbomb/linux/}
-  in the modem branch \\
+  A port to Linux 4.16 of the driver is available at \url{https://github.com/fourkbomb/linux/}
+  in the modem branch. At the beginning it can be used as a base for the work by porting
+  it to Linux 5.0 or later. If that port is chosen, I will then need to investigate,
+  possibly with the help of other upstream Linux developers, how to get rid of the hacks
+  that are present in this port to Linux 4.16. Depending on how it turns out, I may have to
+  rewrite a significant portion of the driver or other related code.
+  At the time of writing I'm aware of a hack with the code that resets the link between
+  the modem and the processor running Android\cite{HSIC-hack}, but it might not be the
+  only issue that may take time to address.
+  \\
   \hline
   \hline
   \multicolumn{3}{|c|}{Total: 147h (~1 month) }\\
@@ -167,6 +175,9 @@
 \bibitem{HIDL}
   \url{https://source.android.com/devices/architecture/hidl/}
 
+\bibitem{HSIC-hack}
+  \url{https://github.com/fourkbomb/linux/commit/5c71c549206351c16412d23c38e3d8d62763f454}
+
 \end{thebibliography}
 
 \end{document}