On 2014년 10월 01일 15:19, YoungJun Cho wrote:
> The drm_helper_hpd_irq_event() does dpms control and panel is
> initialized and displayed on by it.
> So should register TE irq handler(exynos_dsi_te_irq_handler())
> beforehand.
This patch also includes some codes not relevant to register TE irq
handler before drm_helper_hpd_irq_event call. How about separating this
patch into two patches?
And below is my comment.
Thanks,
Inki Dae
>
> Signed-off-by: YoungJun Cho <yj44.cho@xxxxxxxxxxx>
> Acked-by: Inki Dae <inki.dae@xxxxxxxxxxx>
> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_dsi.c | 19 ++++++++-----------
> 1 file changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index 24741d8..ded69df 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1143,6 +1143,7 @@ static int exynos_dsi_init(struct exynos_dsi *dsi)
> static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi)
> {
> int ret;
> + int te_gpio_irq;
>
> dsi->te_gpio = of_get_named_gpio(dsi->panel_node, "te-gpios", 0);
> if (!gpio_is_valid(dsi->te_gpio)) {
> @@ -1157,14 +1158,10 @@ static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi)
> goto out;
> }
>
> - /*
> - * This TE GPIO IRQ should not be set to IRQ_NOAUTOEN, because panel
> - * calls drm_panel_init() first then calls mipi_dsi_attach() in probe().
> - * It means that te_gpio is invalid when exynos_dsi_enable_irq() is
> - * called by drm_panel_init() before panel is attached.
> - */
> - ret = request_threaded_irq(gpio_to_irq(dsi->te_gpio),
> - exynos_dsi_te_irq_handler, NULL,
> + te_gpio_irq = gpio_to_irq(dsi->te_gpio);
> +
> + irq_set_status_flags(te_gpio_irq, IRQ_NOAUTOEN);
I think with IRQ_NOAUTOEN, te irq wouldn't be enabled automatically. So
shouldn't we call enable_irq() and disable_irq() somewhere?
> + ret = request_threaded_irq(te_gpio_irq, exynos_dsi_te_irq_handler, NULL,
> IRQF_TRIGGER_RISING, "TE", dsi);
> if (ret) {
> dev_err(dsi->dev, "request interrupt failed with %d\n", ret);
> @@ -1195,9 +1192,6 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
> dsi->mode_flags = device->mode_flags;
> dsi->panel_node = device->dev.of_node;
>
> - if (dsi->connector.dev)
> - drm_helper_hpd_irq_event(dsi->connector.dev);
> -
> /*
> * This is a temporary solution and should be made by more generic way.
> *
> @@ -1211,6 +1205,9 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
> return ret;
> }
>
> + if (dsi->connector.dev)
> + drm_helper_hpd_irq_event(dsi->connector.dev);
> +
> return 0;
> }
>
>
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