[PATCH 4/8] staging: media: imx: Define per-SoC info

[Jacopo Mondi]

Define the imx-media-info structure which contains CSI configuration
parameter that depend on the SoC version the peripheral is integrated
in.

Replace the existing 'model' field with the newly defined structure.

Only define the SoC id and the supported pixel sampling modes for the
moment.

Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
 drivers/staging/media/imx/imx-media.h      | 44 ++++++++++++++++++++++
 drivers/staging/media/imx/imx7-media-csi.c | 44 ++++++++++++++--------
 2 files changed, 73 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index f263fc3adbb9..1b0b660413cb 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -18,6 +18,16 @@
 #define IMX_MEDIA_DEF_PIX_WIDTH		640
 #define IMX_MEDIA_DEF_PIX_HEIGHT	480
 
+/*
+ * Enumeration of the SoC models the peripheral is integrated in.
+ */
+enum soc_id {
+	IMX6UL,
+	IMX7,
+	IMX8MM,
+	IMX8MQ,
+};
+
 /*
  * Enumeration of the IPU internal sub-devices
  */
@@ -141,10 +151,44 @@ struct imx_media_pad_vdev {
 	struct list_head list;
 };
 
+/*
+ * enum sample_mode_id - Define the CSI Rx queue sample size
+ *
+ * The pixel sampling mode defines the possible sampling methods from the
+ * CSI Rx queue to the next processing block of the capture pipeline.
+ *
+ * The supported methods depends on the SoC model and on synthesis time
+ * configurations.
+ *
+ * @MODE_SINGLE: Single pixel mode sampling
+ * @MODE_DUAL: Double pixel mode sampling
+ * @MODE_QUAD: Quad pixel mode sampling
+ */
+enum sample_mode_id {
+	MODE_SINGLE = BIT(0),
+	MODE_DUAL = BIT(1),
+	MODE_QUAD = BIT(2),
+};
+
+/*
+ * Information and configurations dependent on the SoC the peripheral is
+ * integrated in.
+ *
+ * @soc_id: The SoC identifier. See &enum soc_id.
+ * @sample_modes: Mask of supported pixel modes. See &enum sample_mode_id.
+ */
+struct imx_media_info {
+	enum soc_id soc_id;
+	u8 sample_modes;
+};
+
 struct imx_media_dev {
 	struct media_device md;
 	struct v4l2_device  v4l2_dev;
 
+	/* Per-model information. */
+	const struct imx_media_info *info;
+
 	/* the pipeline object */
 	struct media_pipeline pipe;
 
diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
index 59100e409709..112096774961 100644
--- a/drivers/staging/media/imx/imx7-media-csi.c
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -159,12 +159,6 @@
 #define CSI_CSICR18			0x48
 #define CSI_CSICR19			0x4c
 
-enum imx_csi_model {
-	IMX7_CSI_IMX7 = 0,
-	IMX7_CSI_IMX8MQ,
-	IMX7_CSI_IMX8MM,
-};
-
 struct imx7_csi {
 	struct device *dev;
 	struct v4l2_subdev sd;
@@ -200,8 +194,6 @@ struct imx7_csi {
 	bool is_csi2;
 
 	struct completion last_eof_completion;
-
-	enum imx_csi_model model;
 };
 
 static struct imx7_csi *
@@ -562,6 +554,8 @@ static void imx7_csi_baseaddr_switch_on_second_frame(struct imx7_csi *csi)
 
 static void imx7_csi_enable(struct imx7_csi *csi)
 {
+	struct imx_media_dev *imxmd = csi->imxmd;
+
 	/* Clear the Rx FIFO and reflash the DMA controller. */
 	imx7_csi_rx_fifo_clear(csi);
 	imx7_csi_dma_reflash(csi);
@@ -576,7 +570,7 @@ static void imx7_csi_enable(struct imx7_csi *csi)
 	imx7_csi_dmareq_rff_enable(csi);
 	imx7_csi_hw_enable(csi);
 
-	if (csi->model == IMX7_CSI_IMX8MQ)
+	if (imxmd->info->soc_id == IMX8MQ)
 		imx7_csi_baseaddr_switch_on_second_frame(csi);
 }
 
@@ -1181,8 +1175,6 @@ static int imx7_csi_probe(struct platform_device *pdev)
 	if (IS_ERR(csi->regbase))
 		return PTR_ERR(csi->regbase);
 
-	csi->model = (enum imx_csi_model)(uintptr_t)of_device_get_match_data(&pdev->dev);
-
 	spin_lock_init(&csi->irqlock);
 	mutex_init(&csi->lock);
 
@@ -1202,6 +1194,8 @@ static int imx7_csi_probe(struct platform_device *pdev)
 	}
 	platform_set_drvdata(pdev, &csi->sd);
 
+	imxmd->info = of_device_get_match_data(dev);
+
 	ret = imx_media_of_add_csi(imxmd, node);
 	if (ret < 0 && ret != -ENODEV && ret != -EEXIST)
 		goto cleanup;
@@ -1276,11 +1270,31 @@ static int imx7_csi_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct imx_media_info imx8mq_info = {
+	.soc_id = IMX8MQ,
+	.sample_modes = MODE_SINGLE,
+};
+
+static const struct imx_media_info imx8mm_info = {
+	.soc_id = IMX8MM,
+	.sample_modes = MODE_SINGLE | MODE_DUAL,
+};
+
+static const struct imx_media_info imx7_info = {
+	.soc_id = IMX7,
+	.sample_modes = MODE_SINGLE,
+};
+
+static const struct imx_media_info imx6ul_info = {
+	.soc_id = IMX6UL,
+	.sample_modes = MODE_SINGLE,
+};
+
 static const struct of_device_id imx7_csi_of_match[] = {
-	{ .compatible = "fsl,imx8mq-csi", .data = (void *)IMX7_CSI_IMX8MQ },
-	{ .compatible = "fsl,imx8mm-csi", .data = (void *)IMX7_CSI_IMX8MM },
-	{ .compatible = "fsl,imx7-csi", .data = (void *)IMX7_CSI_IMX7 },
-	{ .compatible = "fsl,imx6ul-csi", .data = (void *)IMX7_CSI_IMX7 },
+	{ .compatible = "fsl,imx8mq-csi", .data = &imx8mq_info },
+	{ .compatible = "fsl,imx8mm-csi", .data = &imx8mm_info },
+	{ .compatible = "fsl,imx7-csi", .data = &imx7_info },
+	{ .compatible = "fsl,imx6ul-csi", .data = &imx6ul_info },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, imx7_csi_of_match);
-- 
2.35.0