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authorJoel Fernandes <joelagnelf@nvidia.com>2026-07-18 13:15:36 -0400
committerPaul E. McKenney <paulmck@kernel.org>2026-07-23 10:39:57 -0700
commit34ff636f322c6d5e4f0a52338fa63a7dff09a495 (patch)
tree7629759c1ec7148b95bc8ab3080df20a5ecd2273 /Documentation/admin-guide/lcd-panel-cgram.rst
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scftorture: Count single_rpc offline failures in statistics outputgrafted
scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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+======================================
+Parallel port LCD/Keypad Panel support
+======================================
+
+Some LCDs allow you to define up to 8 characters, mapped to ASCII
+characters 0 to 7. The escape code to define a new character is
+'\e[LG' followed by one digit from 0 to 7, representing the character
+number, and up to 8 couples of hex digits terminated by a semi-colon
+(';'). Each couple of digits represents a line, with 1-bits for each
+illuminated pixel with LSB on the right. Lines are numbered from the
+top of the character to the bottom. On a 5x7 matrix, only the 5 lower
+bits of the 7 first bytes are used for each character. If the string
+is incomplete, only complete lines will be redefined. Here are some
+examples::
+
+ printf "\e[LG0010101050D1F0C04;" => 0 = [enter]
+ printf "\e[LG1040E1F0000000000;" => 1 = [up]
+ printf "\e[LG2000000001F0E0400;" => 2 = [down]
+ printf "\e[LG3040E1F001F0E0400;" => 3 = [up-down]
+ printf "\e[LG40002060E1E0E0602;" => 4 = [left]
+ printf "\e[LG500080C0E0F0E0C08;" => 5 = [right]
+ printf "\e[LG60016051516141400;" => 6 = "IP"
+
+ printf "\e[LG00103071F1F070301;" => big speaker
+ printf "\e[LG00002061E1E060200;" => small speaker
+
+Willy