Dear Yannick,
Thank you for your patch,
Acked-by: Philippe Cornu <philippe.cornu@xxxxxx>
Philippe :-)
On 1/21/20 11:14 AM, Yannick Fertre wrote:
> Following investigations of a hardware bug, the LIE interrupt
> can occur while the display controller is not activated.
> LIE interrupt (vblank) don't have to be set if the CRTC is not
> enabled.
>
> Signed-off-by: Yannick Fertre <yannick.fertre@xxxxxx>
> ---
> drivers/gpu/drm/stm/ltdc.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index c2815e8..ea654c7 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -648,9 +648,14 @@ static const struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
> static int ltdc_crtc_enable_vblank(struct drm_crtc *crtc)
> {
> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> + struct drm_crtc_state *state = crtc->state;
>
> DRM_DEBUG_DRIVER("\n");
> - reg_set(ldev->regs, LTDC_IER, IER_LIE);
> +
> + if (state->enable)
> + reg_set(ldev->regs, LTDC_IER, IER_LIE);
> + else
> + return -EPERM;
>
> return 0;
> }
>
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