lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 12 Mar 2020 00:33:28 +0800 From: Icenowy Zheng <icenowy@...c.io> To: Thierry Reding <thierry.reding@...il.com>, Sam Ravnborg <sam@...nborg.org>, Rob Herring <robh+dt@...nel.org>, Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>, Ondrej Jirman <megous@...ous.com> Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com, Icenowy Zheng <icenowy@...c.io> Subject: [PATCH 4/5] drm/sun4i: sun6i_mipi_dsi: fix horizontal timing calculation The max() function call in horizontal timing calculation shouldn't pad a length already subtracted with overhead to overhead, instead it should only prevent the set timing to underflow. Signed-off-by: Icenowy Zheng <icenowy@...c.io> --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 059939789730..5f2313c40328 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -555,7 +555,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, */ #define HSA_PACKET_OVERHEAD 10 hsa = max((unsigned int)HSA_PACKET_OVERHEAD, - (mode->hsync_end - mode->hsync_start) * Bpp - HSA_PACKET_OVERHEAD); + (mode->hsync_end - mode->hsync_start) * Bpp) - HSA_PACKET_OVERHEAD; /* * The backporch is set using a blanking packet (4 @@ -564,7 +564,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, */ #define HBP_PACKET_OVERHEAD 6 hbp = max((unsigned int)HBP_PACKET_OVERHEAD, - (mode->htotal - mode->hsync_end) * Bpp - HBP_PACKET_OVERHEAD); + (mode->htotal - mode->hsync_end) * Bpp) - HBP_PACKET_OVERHEAD; /* * The frontporch is set using a sync event (4 bytes) @@ -574,7 +574,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, */ #define HFP_PACKET_OVERHEAD 16 hfp = max((unsigned int)HFP_PACKET_OVERHEAD, - (mode->hsync_start - mode->hdisplay) * Bpp - HFP_PACKET_OVERHEAD); + (mode->hsync_start - mode->hdisplay) * Bpp) - HFP_PACKET_OVERHEAD; /* * The blanking is set using a sync event (4 bytes) @@ -583,8 +583,8 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, */ #define HBLK_PACKET_OVERHEAD 10 hblk = max((unsigned int)HBLK_PACKET_OVERHEAD, - (mode->htotal - (mode->hsync_end - mode->hsync_start)) * Bpp - - HBLK_PACKET_OVERHEAD); + (mode->htotal - (mode->hsync_end - mode->hsync_start)) * Bpp) - + HBLK_PACKET_OVERHEAD; /* * And I'm not entirely sure what vblk is about. The driver in -- 2.24.1
Powered by blists - more mailing lists