linux-kernel - Re: [PATCH v3 03/14] media: rkisp1: Add and use rkisp1_has

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Date:   Sat, 19 Nov 2022 13:03:22 +0200
From:   Dafna Hirschfeld <dafna@...tmail.com>
To:     Paul Elder <paul.elder@...asonboard.com>
Cc:     linux-media@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Helen Koike <helen.koike@...labora.com>,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH v3 03/14] media: rkisp1: Add and use rkisp1_has_feature()
 macro

On 18.11.2022 18:39, Paul Elder wrote:
>From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
>Simplify feature tests with a macro that shortens lines.
>
>Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>Reviewed-by: Paul Elder <paul.elder@...asonboard.com>
>Reviewed-by: Kieran Bingham <kieran.bingham@...asonboard.com>
>---
> .../media/platform/rockchip/rkisp1/rkisp1-common.h |  3 +++
> .../media/platform/rockchip/rkisp1/rkisp1-dev.c    | 14 +++++++-------
> 2 files changed, 10 insertions(+), 7 deletions(-)
>
>diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
>index a1293c45aae1..fc33c185b99f 100644
>--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
>+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
>@@ -111,6 +111,9 @@ enum rkisp1_feature {
> 	RKISP1_FEATURE_MIPI_CSI2 = BIT(0),
> };
>
>+#define rkisp1_has_feature(rkisp1, feature) \
>+	((rkisp1)->info->features & RKISP1_FEATURE_##feature)

maybe instead of that string concatination you can remove the 'RKISP1_FEATURE' prefix from the
enum

thanks,
Dafna

>+
> /*
>  * struct rkisp1_info - Model-specific ISP Information
>  *
>diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
>index f2475c6235ea..e348d8c86861 100644
>--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
>+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
>@@ -206,7 +206,7 @@ static int rkisp1_subdev_notifier_register(struct rkisp1_device *rkisp1)
> 		switch (reg) {
> 		case 0:
> 			/* MIPI CSI-2 port */
>-			if (!(rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)) {
>+			if (!rkisp1_has_feature(rkisp1, MIPI_CSI2)) {
> 				dev_err(rkisp1->dev,
> 					"internal CSI must be available for port 0\n");
> 				ret = -EINVAL;
>@@ -338,7 +338,7 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1)
> 	unsigned int i;
> 	int ret;
>
>-	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
>+	if (rkisp1_has_feature(rkisp1, MIPI_CSI2)) {
> 		/* Link the CSI receiver to the ISP. */
> 		ret = media_create_pad_link(&rkisp1->csi.sd.entity,
> 					    RKISP1_CSI_PAD_SRC,
>@@ -390,7 +390,7 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1)
>
> static void rkisp1_entities_unregister(struct rkisp1_device *rkisp1)
> {
>-	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
>+	if (rkisp1_has_feature(rkisp1, MIPI_CSI2))
> 		rkisp1_csi_unregister(rkisp1);
> 	rkisp1_params_unregister(rkisp1);
> 	rkisp1_stats_unregister(rkisp1);
>@@ -423,7 +423,7 @@ static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
> 	if (ret)
> 		goto error;
>
>-	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
>+	if (rkisp1_has_feature(rkisp1, MIPI_CSI2)) {
> 		ret = rkisp1_csi_register(rkisp1);
> 		if (ret)
> 			goto error;
>@@ -590,7 +590,7 @@ static int rkisp1_probe(struct platform_device *pdev)
> 		goto err_unreg_v4l2_dev;
> 	}
>
>-	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
>+	if (rkisp1_has_feature(rkisp1, MIPI_CSI2)) {
> 		ret = rkisp1_csi_init(rkisp1);
> 		if (ret)
> 			goto err_unreg_media_dev;
>@@ -611,7 +611,7 @@ static int rkisp1_probe(struct platform_device *pdev)
> err_unreg_entities:
> 	rkisp1_entities_unregister(rkisp1);
> err_cleanup_csi:
>-	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
>+	if (rkisp1_has_feature(rkisp1, MIPI_CSI2))
> 		rkisp1_csi_cleanup(rkisp1);
> err_unreg_media_dev:
> 	media_device_unregister(&rkisp1->media_dev);
>@@ -630,7 +630,7 @@ static int rkisp1_remove(struct platform_device *pdev)
> 	v4l2_async_nf_cleanup(&rkisp1->notifier);
>
> 	rkisp1_entities_unregister(rkisp1);
>-	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
>+	if (rkisp1_has_feature(rkisp1, MIPI_CSI2))
> 		rkisp1_csi_cleanup(rkisp1);
> 	rkisp1_debug_cleanup(rkisp1);
>
>-- 
>2.35.1
>