kernel/linux.git/drivers/gpu/drm/drm_modes.c, branch v6.1.168

drm/modes: Avoid divide by zero harder in drm_mode_vrefresh()

2024-12-27T12:52:57+00:00

commit 9398332f23fab10c5ec57c168b44e72997d6318e upstream. drm_mode_vrefresh() is trying to avoid divide by zero by checking whether htotal or vtotal are zero. But we may still end up with a div-by-zero of vtotal*htotal*... Cc: stable@vger.kernel.org Reported-by: syzbot+622bba18029bcde672e1@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=622bba18029bcde672e1 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20241129042629.18280-2-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

drm: Remove linux/fb.h from drm_crtc.h

2022-07-05T18:14:02+00:00

drm_crtc.h has no need for linux/fb.h, so don't include it. Avoids useless rebuilds of the entire universe when touching linux/fb.h. Quite a few placs do currently depend on linux/fb.h or other headers pulled in by it without actually including any of it directly. All of those need to be fixed up. v2: Split the vmwgfx change out Acked-by: Sam Ravnborg Acked-by: Jani Nikula Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220630195114.17407-3-ville.syrjala@linux.intel.com

drm: Drop drm_edid.h from drm_crtc.h

2022-06-20T20:53:55+00:00

drm_crtc.h has no need for drm_edid.h, so don't include it. Avoids useless rebuilds of the entire universe when touching drm_edid.h. Quite a few placs do currently depend on drm_edid.h without actually including it directly. All of those need to be fixed up. v2: Fix up i915 and msm some more v3: Fix alphabetical ordering (Sam) Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220614090245.30283-1-ville.syrjala@linux.intel.com Acked-by: Sam Ravnborg Acked-by: Jani Nikula

drm: Always warn if user-defined modes are not supported

2022-05-16T11:42:49+00:00

Print a warning if a user-specifed display mode is not supported by the display pipeline. Users specified the display mode on the kernel command line with the use of the video= parameter. Setting an unsupported mode will leave the console blank, so we should at least let the user know why. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Reviewed-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20220511183125.14294-2-tzimmermann@suse.de

drm/modes: Make width-mm/height-mm check in of_get_drm_panel_display_mode() mandatory

2022-04-24T21:54:05+00:00

All users of this function require width-mm/height-mm DT property to be present per their DT bindings, make width-mm/height-mm check mandatory. It is generally a good idea to specify panel dimensions, so userspace can configure e.g. scaling accordingly. Signed-off-by: Marek Vasut Cc: Christoph Niedermaier Cc: Daniel Vetter Cc: Dmitry Osipenko Cc: Laurent Pinchart Cc: Noralf Trønnes Cc: Rob Herring Cc: Robert Foss Cc: Sam Ravnborg Cc: Thomas Zimmermann To: dri-devel@lists.freedesktop.org Reviewed-by: Noralf Trønnes Link: https://patchwork.freedesktop.org/patch/msgid/20220411004728.68203-1-marex@denx.de

drm: Use drm_mode_init() for on-stack modes

2022-04-12T06:26:08+00:00

Initialize on-stack modes with drm_mode_init() to guarantee no stack garbage in the list head, or that we aren't copying over another mode's list head. Based on the following cocci script, with manual fixups: @decl@ identifier M; expression E; @@ - struct drm_display_mode M = E; + struct drm_display_mode M; @@ identifier decl.M; expression decl.E; statement S, S1; @@ struct drm_display_mode M; ... when != S + drm_mode_init(&M, &E); + S1 @@ expression decl.E; @@ - &*E + E Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220218100403.7028-22-ville.syrjala@linux.intel.com Reviewed-by: Andrzej Hajda

drm: Add drm_mode_init()

2022-03-14T15:36:59+00:00

Add a variant of drm_mode_copy() that explicitly clears out the list head of the destination mode. Helpful to guarantee we don't have stack garbage left in there for on-stack modes. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220218100403.7028-2-ville.syrjala@linux.intel.com Reviewed-by: Andrzej Hajda Reviewed-by: Harry Wentland

drm/modes: Add of_get_drm_panel_display_mode()

2022-02-28T09:29:33+00:00

Add a function to get a drm_display_mode from a panel-timing device tree subnode. Suggested-by: Sam Ravnborg Reviewed-by: Sam Ravnborg Signed-off-by: Noralf Trønnes Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-4-noralf@tronnes.org

drm/modes: Remove trailing whitespace

2022-02-28T09:29:33+00:00

Remove trailing whitespace from a comment. Acked-by: Sam Ravnborg Signed-off-by: Noralf Trønnes Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-3-noralf@tronnes.org

drm/modes: Fix drm_mode_copy() docs

2022-02-16T11:41:21+00:00

There is no object id in drm_display_mode anymore. Remove stale comments to the contrary. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220209091928.14766-2-ville.syrjala@linux.intel.com Acked-by: Maxime Ripard