On Tue, Aug 7, 2012 at 11:54 PM, Sean Paul <seanpaul@xxxxxxxxxxxx> wrote:
> Move the hotplug related code from probe and resume into a workqueue.
> This allows us to initialize the DP driver (and resume it) when there
> is no monitor connected.
>
Comments?
> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Reviewed-by: Olof Johansson <olofj@xxxxxxxxxxxx>
> ---
> drivers/video/exynos/exynos_dp_core.c | 94 +++++++++++++++++----------------
> drivers/video/exynos/exynos_dp_core.h | 1 +
> 2 files changed, 50 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
> index 2882362..68ad494 100644
> --- a/drivers/video/exynos/exynos_dp_core.c
> +++ b/drivers/video/exynos/exynos_dp_core.c
> @@ -834,6 +834,45 @@ static irqreturn_t exynos_dp_irq_handler(int irq, void *arg)
> return IRQ_HANDLED;
> }
>
> +static void exynos_dp_hotplug(struct work_struct *work)
> +{
> + struct exynos_dp_device *dp;
> + int ret;
> +
> + dp = container_of(work, struct exynos_dp_device, hotplug_work);
> +
> + ret = exynos_dp_detect_hpd(dp);
> + if (ret) {
> + dev_err(dp->dev, "unable to detect hpd\n");
> + return;
> + }
> +
> + ret = exynos_dp_handle_edid(dp);
> + if (ret) {
> + dev_err(dp->dev, "unable to handle edid\n");
> + return;
> + }
> +
> + ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
> + dp->video_info->link_rate);
> + if (ret) {
> + dev_err(dp->dev, "unable to do link train\n");
> + return;
> + }
> +
> + exynos_dp_enable_scramble(dp, 1);
> + exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
> + exynos_dp_enable_enhanced_mode(dp, 1);
> +
> + exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
> + exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
> +
> + exynos_dp_init_video(dp);
> + ret = exynos_dp_config_video(dp, dp->video_info);
> + if (ret)
> + dev_err(&dp->dev, "unable to config video\n");
> +}
> +
> static int __devinit exynos_dp_probe(struct platform_device *pdev)
> {
> struct resource *res;
> @@ -886,6 +925,8 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
> goto err_clock;
> }
>
> + INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug);
> +
> ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler, 0,
> "exynos-dp", dp);
> if (ret) {
> @@ -899,36 +940,8 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
>
> exynos_dp_init_dp(dp);
>
> - ret = exynos_dp_detect_hpd(dp);
> - if (ret) {
> - dev_err(&pdev->dev, "unable to detect hpd\n");
> - goto err_clock;
> - }
> -
> - exynos_dp_handle_edid(dp);
> -
> - ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
> - dp->video_info->link_rate);
> - if (ret) {
> - dev_err(&pdev->dev, "unable to do link train\n");
> - goto err_clock;
> - }
> -
> - exynos_dp_enable_scramble(dp, 1);
> - exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
> - exynos_dp_enable_enhanced_mode(dp, 1);
> -
> - exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
> - exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
> -
> - exynos_dp_init_video(dp);
> - ret = exynos_dp_config_video(dp, dp->video_info);
> - if (ret) {
> - dev_err(&pdev->dev, "unable to config video\n");
> - goto err_clock;
> - }
> -
> platform_set_drvdata(pdev, dp);
> + schedule_work(&dp->hotplug_work);
>
> return 0;
>
> @@ -943,6 +956,9 @@ static int __devexit exynos_dp_remove(struct platform_device *pdev)
> struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
> struct exynos_dp_device *dp = platform_get_drvdata(pdev);
>
> + if (work_pending(&dp->hotplug_work))
> + flush_work_sync(&dp->hotplug_work);
> +
> if (pdata && pdata->phy_exit)
> pdata->phy_exit();
>
> @@ -959,6 +975,9 @@ static int exynos_dp_suspend(struct device *dev)
> struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
> struct exynos_dp_device *dp = platform_get_drvdata(pdev);
>
> + if (work_pending(&dp->hotplug_work))
> + flush_work_sync(&dp->hotplug_work);
> +
> if (pdata && pdata->phy_exit)
> pdata->phy_exit();
>
> @@ -979,22 +998,7 @@ static int exynos_dp_resume(struct device *dev)
> clk_enable(dp->clock);
>
> exynos_dp_init_dp(dp);
> -
> - exynos_dp_detect_hpd(dp);
> - exynos_dp_handle_edid(dp);
> -
> - exynos_dp_set_link_train(dp, dp->video_info->lane_count,
> - dp->video_info->link_rate);
> -
> - exynos_dp_enable_scramble(dp, 1);
> - exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
> - exynos_dp_enable_enhanced_mode(dp, 1);
> -
> - exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
> - exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
> -
> - exynos_dp_init_video(dp);
> - exynos_dp_config_video(dp, dp->video_info);
> + schedule_work(&dp->hotplug_work);
>
> return 0;
> }
> diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
> index 6431c65..cf1010b 100644
> --- a/drivers/video/exynos/exynos_dp_core.h
> +++ b/drivers/video/exynos/exynos_dp_core.h
> @@ -32,6 +32,7 @@ struct exynos_dp_device {
>
> struct video_info *video_info;
> struct link_train link_train;
> + struct work_struct hotplug_work;
> };
>
> /* exynos_dp_reg.c */
> --
> 1.7.7.3
>
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