On Thu, Jun 13, 2019 at 03:13:10PM +0000, Ayan Halder wrote:
> Komeda interrupts may be shared with other hardware blocks.
> One needs to use devm_request_irq() with IRQF_SHARED to create a shared
> interrupt handler.
> As a result of not using drm_irq_install() api, one needs to set
> "(struct drm_device *)->irq_enabled = true/false" to enable/disable
> vblank interrupts.
>
> Changes from v1:-
> 1. Squashed the following two patches into one (as the second patch is a
> consequence of the first one):-
> drm/komeda: Avoid using DRIVER_IRQ_SHARED
> drm/komeda: Enable/Disable vblank interrupts
> 2. Fixed the commit message (as pointed by Daniel Vetter)
> 3. Removed calls to 'drm_irq_uninstall()' as we are no longer using
> drm_irq_install()
> 4. Removed the struct member 'komeda_kms_driver.irq_handler' as it is not
> used anywhere.
>
> Signed-off-by: Ayan Kumar halder <ayan.hal...@arm.com>
> ---
> drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> --
> 2.21.0
> Reviewed-by: Liviu Dudau <liviu.du...@arm.com>
>
looks good to me.
Thank you Ayan.
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.w...@arm.com>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> index 86f6542afb40..bb2bffc0e022 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> @@ -58,7 +58,6 @@ static struct drm_driver komeda_kms_driver = {
> .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
> DRIVER_PRIME | DRIVER_HAVE_IRQ,
> .lastclose = drm_fb_helper_lastclose,
> - .irq_handler = komeda_kms_irq_handler,
> .gem_free_object_unlocked = drm_gem_cma_free_object,
> .gem_vm_ops = &drm_gem_cma_vm_ops,
> .dumb_create = komeda_gem_cma_dumb_create,
> @@ -194,23 +193,26 @@ struct komeda_kms_dev *komeda_kms_attach(struct
> komeda_dev *mdev)
>
> drm_mode_config_reset(drm);
>
> - err = drm_irq_install(drm, mdev->irq);
> + err = devm_request_irq(drm->dev, mdev->irq,
> + komeda_kms_irq_handler, IRQF_SHARED,
> + drm->driver->name, drm);
> if (err)
> goto cleanup_mode_config;
>
> err = mdev->funcs->enable_irq(mdev);
> if (err)
> - goto uninstall_irq;
> + goto cleanup_mode_config;
> +
> + drm->irq_enabled = true;
>
> err = drm_dev_register(drm, 0);
> if (err)
> - goto uninstall_irq;
> + goto cleanup_mode_config;
>
> return kms;
>
> -uninstall_irq:
> - drm_irq_uninstall(drm);
> cleanup_mode_config:
> + drm->irq_enabled = false;
> drm_mode_config_cleanup(drm);
> komeda_kms_cleanup_private_objs(kms);
> free_kms:
> @@ -223,9 +225,9 @@ void komeda_kms_detach(struct komeda_kms_dev *kms)
> struct drm_device *drm = &kms->base;
> struct komeda_dev *mdev = drm->dev_private;
>
> + drm->irq_enabled = false;
> mdev->funcs->disable_irq(mdev);
> drm_dev_unregister(drm);
> - drm_irq_uninstall(drm);
> component_unbind_all(mdev->dev, drm);
> komeda_kms_cleanup_private_objs(kms);
> drm_mode_config_cleanup(drm);
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