[Intel-gfx] [PATCH 4/4] drm/i915: Only enable cursor if it can be enabled.
Ville Syrjälä
ville.syrjala at linux.intel.com
Fri Jun 12 03:26:56 PDT 2015
On Fri, Jun 12, 2015 at 11:15:42AM +0200, Maarten Lankhorst wrote:
> The cursor should only be enabled if it's visible. This fixes
> igt/kms_cursor_crc, which may otherwise produce the following
> warning:
>
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 3425 at drivers/gpu/drm/i915/intel_display.c:9995 intel_crtc_update_cursor+0x14c/0x4d0 [i915]()
> Missing switch case (0) in i9xx_update_cursor
> Modules linked in: i915
> CPU: 0 PID: 3425 Comm: kms_cursor_crc Tainted: G W 4.1.0-rc7-patser+ #4079
> Hardware name: LENOVO 2349AV8/2349AV8, BIOS G1ETA5WW (2.65 ) 04/15/2014
> ffffffffc01aad10 ffff8800b083faa8 ffffffff817f7827 0000000080000001
> ffff8800b083faf8 ffff8800b083fae8 ffffffff81084955 ffff8800b083fad8
> ffff8800c4931148 0000000001200000 ffff8800c48b0000 0000000000000000
> Call Trace:
> [<ffffffff817f7827>] dump_stack+0x4f/0x7b
> [<ffffffff81084955>] warn_slowpath_common+0x85/0xc0
> [<ffffffff810849d1>] warn_slowpath_fmt+0x41/0x50
> [<ffffffffc0139f2c>] intel_crtc_update_cursor+0x14c/0x4d0 [i915]
> [<ffffffffc01497f4>] __intel_set_mode+0x6c4/0x750 [i915]
> [<ffffffffc0150143>] intel_crtc_set_config+0x473/0x5c0 [i915]
> [<ffffffff81467da9>] drm_mode_set_config_internal+0x69/0x120
> [<ffffffff8146c1b9>] drm_mode_setcrtc+0x189/0x540
> [<ffffffff8145c7e0>] drm_ioctl+0x1a0/0x6a0
> [<ffffffff810b3b41>] ? get_parent_ip+0x11/0x50
> [<ffffffff811e9c28>] do_vfs_ioctl+0x2f8/0x530
> [<ffffffff810d0f7d>] ? trace_hardirqs_on+0xd/0x10
> [<ffffffff812e7746>] ? selinux_file_ioctl+0x56/0x100
> [<ffffffff811e9ee1>] SyS_ioctl+0x81/0xa0
> [<ffffffff81801617>] system_call_fastpath+0x12/0x6f
> ---[ end trace abf0f71163290a96 ]---
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 14ccf49b9067..afe91a8f7e36 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4748,7 +4748,8 @@ static void intel_crtc_enable_planes(struct drm_crtc *crtc)
>
> intel_enable_primary_hw_plane(crtc->primary, crtc);
> intel_enable_sprite_planes(crtc);
> - intel_crtc_update_cursor(crtc, true);
> + if (to_intel_plane_state(crtc->cursor->state)->visible)
> + intel_crtc_update_cursor(crtc, true);
Can we actually trust it now? Last time I looked we couldn't, and
Daniel didn't want my fixes to make it so.
So if we can't trust 'visible' I suppose you should just do
something a bit more ugly and look at 'crtc_w' or something.
>
> intel_post_enable_primary(crtc);
>
> --
> 2.1.0
>
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--
Ville Syrjälä
Intel OTC
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