superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

media: vivid: use prandom 

This is part of a prandom cleanup, which removes
next_pseudo_random32 and replaces it with the standard PRNG.

Signed-off-by: Markus Theil <theil.markus@gmail.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
pull/1354/merge
Markus Theil 2025-02-11 07:33:31 +01:00 committed by Jason A. Donenfeld
parent a6a4d97f0d
commit 8c0cf6542e
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/media/test-drivers/vivid/vivid-vid-cap.c
View File

@ -302,8 +302,10 @@ void vivid_update_quality(struct vivid_dev *dev)
*/
freq_modulus = (dev->tv_freq - 676 /* (43.25-1) * 16 */) % (6 * 16);
if (freq_modulus > 2 * 16) {
struct rnd_state prng;
prandom_seed_state(&prng, dev->tv_freq ^ 0x55);
tpg_s_quality(&dev->tpg, TPG_QUAL_NOISE,
next_pseudo_random32(dev->tv_freq ^ 0x55) & 0x3f);
prandom_u32_state(&prng) & 0x3f);
return;
}
if (freq_modulus < 12 /*0.75 * 16*/ || freq_modulus > 20 /*1.25 * 16*/)