[PATCH v9 08/22] media: camss: Add missing format identifiers

From: Robert Foss
Date: Tue Mar 16 2021 - 13:23:21 EST

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The CSI-2 spec defines format identifier for Data Type (DT),
and how the Decode Format (DF) & Encode Format (EF) are implemented.
The spec does however not define the DF, EF or Plain Format (PF)
identifiers, as those are vendor specific.

Plain formats describe the size of the pixels written by the RDI
units to memory. PLAIN8 for example has the size 8 bits, and
PLAIN32 32 bits. The appropriate Plain Format is determined by
the Decode Format used. The smallest Plain Format that is able
to contain a pixel of the used Decode Format is the appropriate
one to use.

As the vendor specific identifiers differ between hardware
generations, split them out into separate headers.

Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxx>
Reviewed-by: Andrey Konovalov <andrey.konovalov@xxxxxxxxxx>
---

Changes since v5
- Andrey: Gen 1 & Gen2 devices have different decode/encode/plain
format definitions, list in separate headers
- Andrey: Make commit msg more clear about what is in MIPI spec or not

Changes since v6
- Andrey: Add r-b

Changes since v7:
- Hans: Fix checkpatch.pl --strict warnings

.../platform/qcom/camss/camss-csid-gen1.h | 27 +++++++++++++
.../platform/qcom/camss/camss-csid-gen2.h | 39 +++++++++++++++++++
.../media/platform/qcom/camss/camss-csid.c | 19 ++-------
.../media/platform/qcom/camss/camss-csid.h | 23 +++++++++++
4 files changed, 92 insertions(+), 16 deletions(-)
create mode 100644 drivers/media/platform/qcom/camss/camss-csid-gen1.h
create mode 100644 drivers/media/platform/qcom/camss/camss-csid-gen2.h

diff --git a/drivers/media/platform/qcom/camss/camss-csid-gen1.h b/drivers/media/platform/qcom/camss/camss-csid-gen1.h
new file mode 100644
index 000000000000..80a2bc6efff6
--- /dev/null
+++ b/drivers/media/platform/qcom/camss/camss-csid-gen1.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * camss-csid-gen1.h
+ *
+ * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module Generation 1
+ *
+ * Copyright (C) 2021 Linaro Ltd.
+ */
+#ifndef QC_MSM_CAMSS_CSID_GEN1_H
+#define QC_MSM_CAMSS_CSID_GEN1_H
+
+#define DECODE_FORMAT_UNCOMPRESSED_6_BIT 0x0
+#define DECODE_FORMAT_UNCOMPRESSED_8_BIT 0x1
+#define DECODE_FORMAT_UNCOMPRESSED_10_BIT 0x2
+#define DECODE_FORMAT_UNCOMPRESSED_12_BIT 0x3
+#define DECODE_FORMAT_DPCM_10_6_10 0x4
+#define DECODE_FORMAT_DPCM_10_8_10 0x5
+#define DECODE_FORMAT_DPCM_12_6_12 0x6
+#define DECODE_FORMAT_DPCM_12_8_12 0x7
+#define DECODE_FORMAT_UNCOMPRESSED_14_BIT 0x8
+#define DECODE_FORMAT_DPCM_14_8_14 0x9
+#define DECODE_FORMAT_DPCM_14_10_14 0xa
+
+#define PLAIN_FORMAT_PLAIN8 0x0 /* supports DPCM, UNCOMPRESSED_6/8_BIT */
+#define PLAIN_FORMAT_PLAIN16 0x1 /* supports DPCM, UNCOMPRESSED_10/16_BIT */
+
+#endif /* QC_MSM_CAMSS_CSID_GEN1_H */
diff --git a/drivers/media/platform/qcom/camss/camss-csid-gen2.h b/drivers/media/platform/qcom/camss/camss-csid-gen2.h
new file mode 100644
index 000000000000..3a8ad001b3e8
--- /dev/null
+++ b/drivers/media/platform/qcom/camss/camss-csid-gen2.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * camss-csid-gen1.h
+ *
+ * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module Generation 1
+ *
+ * Copyright (C) 2021 Linaro Ltd.
+ */
+#ifndef QC_MSM_CAMSS_CSID_GEN2_H
+#define QC_MSM_CAMSS_CSID_GEN2_H
+
+#define DECODE_FORMAT_UNCOMPRESSED_6_BIT 0x0
+#define DECODE_FORMAT_UNCOMPRESSED_8_BIT 0x1
+#define DECODE_FORMAT_UNCOMPRESSED_10_BIT 0x2
+#define DECODE_FORMAT_UNCOMPRESSED_12_BIT 0x3
+#define DECODE_FORMAT_UNCOMPRESSED_14_BIT 0x4
+#define DECODE_FORMAT_UNCOMPRESSED_16_BIT 0x5
+#define DECODE_FORMAT_UNCOMPRESSED_20_BIT 0x6
+#define DECODE_FORMAT_DPCM_10_6_10 0x7
+#define DECODE_FORMAT_DPCM_10_8_10 0x8
+#define DECODE_FORMAT_DPCM_12_6_12 0x9
+#define DECODE_FORMAT_DPCM_12_8_12 0xa
+#define DECODE_FORMAT_DPCM_14_8_14 0xb
+#define DECODE_FORMAT_DPCM_14_10_14 0xc
+#define DECODE_FORMAT_DPCM_12_10_12 0xd
+#define DECODE_FORMAT_USER_DEFINED 0xe
+#define DECODE_FORMAT_PAYLOAD_ONLY 0xf
+
+#define ENCODE_FORMAT_RAW_8_BIT 0x1
+#define ENCODE_FORMAT_RAW_10_BIT 0x2
+#define ENCODE_FORMAT_RAW_12_BIT 0x3
+#define ENCODE_FORMAT_RAW_14_BIT 0x4
+#define ENCODE_FORMAT_RAW_16_BIT 0x5
+
+#define PLAIN_FORMAT_PLAIN8 0x0 /* supports DPCM, UNCOMPRESSED_6/8_BIT */
+#define PLAIN_FORMAT_PLAIN16 0x1 /* supports DPCM, UNCOMPRESSED_10/16_BIT */
+#define PLAIN_FORMAT_PLAIN32 0x2 /* supports UNCOMPRESSED_20_BIT */
+
+#endif /* QC_MSM_CAMSS_CSID_GEN2_H */
diff --git a/drivers/media/platform/qcom/camss/camss-csid.c b/drivers/media/platform/qcom/camss/camss-csid.c
index cff9759c9158..e76c509f3cda 100644
--- a/drivers/media/platform/qcom/camss/camss-csid.c
+++ b/drivers/media/platform/qcom/camss/camss-csid.c
@@ -22,6 +22,7 @@
#include <media/v4l2-subdev.h>

#include "camss-csid.h"
+#include "camss-csid-gen1.h"
#include "camss.h"

#define MSM_CSID_NAME "msm_csid"
@@ -37,8 +38,8 @@
#define CAMSS_CSID_CID_n_CFG_ISPIF_EN BIT(0)
#define CAMSS_CSID_CID_n_CFG_RDI_EN BIT(1)
#define CAMSS_CSID_CID_n_CFG_DECODE_FORMAT_SHIFT 4
-#define CAMSS_CSID_CID_n_CFG_PLAIN_FORMAT_8 (0 << 8)
-#define CAMSS_CSID_CID_n_CFG_PLAIN_FORMAT_16 (1 << 8)
+#define CAMSS_CSID_CID_n_CFG_PLAIN_FORMAT_8 (PLAIN_FORMAT_PLAIN8 << 8)
+#define CAMSS_CSID_CID_n_CFG_PLAIN_FORMAT_16 (PLAIN_FORMAT_PLAIN16 << 8)
#define CAMSS_CSID_CID_n_CFG_PLAIN_ALIGNMENT_LSB (0 << 9)
#define CAMSS_CSID_CID_n_CFG_PLAIN_ALIGNMENT_MSB (1 << 9)
#define CAMSS_CSID_CID_n_CFG_RDI_MODE_RAW_DUMP (0 << 10)
@@ -59,20 +60,6 @@
#define CAMSS_CSID_TG_DT_n_CGG_2(v, n) \
(((v) == CAMSS_8x16 ? 0x0b4 : 0x0bc) + 0xc * (n))

-#define DATA_TYPE_EMBEDDED_DATA_8BIT 0x12
-#define DATA_TYPE_YUV422_8BIT 0x1e
-#define DATA_TYPE_RAW_6BIT 0x28
-#define DATA_TYPE_RAW_8BIT 0x2a
-#define DATA_TYPE_RAW_10BIT 0x2b
-#define DATA_TYPE_RAW_12BIT 0x2c
-#define DATA_TYPE_RAW_14BIT 0x2d
-
-#define DECODE_FORMAT_UNCOMPRESSED_6_BIT 0x0
-#define DECODE_FORMAT_UNCOMPRESSED_8_BIT 0x1
-#define DECODE_FORMAT_UNCOMPRESSED_10_BIT 0x2
-#define DECODE_FORMAT_UNCOMPRESSED_12_BIT 0x3
-#define DECODE_FORMAT_UNCOMPRESSED_14_BIT 0x8
-
#define CSID_RESET_TIMEOUT_MS 500

struct csid_format {
diff --git a/drivers/media/platform/qcom/camss/camss-csid.h b/drivers/media/platform/qcom/camss/camss-csid.h
index 1824b3745e10..479ac1f83836 100644
--- a/drivers/media/platform/qcom/camss/camss-csid.h
+++ b/drivers/media/platform/qcom/camss/camss-csid.h
@@ -21,6 +21,29 @@
#define MSM_CSID_PAD_SRC 1
#define MSM_CSID_PADS_NUM 2

+#define DATA_TYPE_EMBEDDED_DATA_8BIT 0x12
+#define DATA_TYPE_YUV420_8BIT 0x18
+#define DATA_TYPE_YUV420_10BIT 0x19
+#define DATA_TYPE_YUV420_8BIT_LEGACY 0x1a
+#define DATA_TYPE_YUV420_8BIT_SHIFTED 0x1c /* Chroma Shifted Pixel Sampling */
+#define DATA_TYPE_YUV420_10BIT_SHIFTED 0x1d /* Chroma Shifted Pixel Sampling */
+#define DATA_TYPE_YUV422_8BIT 0x1e
+#define DATA_TYPE_YUV422_10BIT 0x1f
+#define DATA_TYPE_RGB444 0x20
+#define DATA_TYPE_RGB555 0x21
+#define DATA_TYPE_RGB565 0x22
+#define DATA_TYPE_RGB666 0x23
+#define DATA_TYPE_RGB888 0x24
+#define DATA_TYPE_RAW_24BIT 0x27
+#define DATA_TYPE_RAW_6BIT 0x28
+#define DATA_TYPE_RAW_7BIT 0x29
+#define DATA_TYPE_RAW_8BIT 0x2a
+#define DATA_TYPE_RAW_10BIT 0x2b
+#define DATA_TYPE_RAW_12BIT 0x2c
+#define DATA_TYPE_RAW_14BIT 0x2d
+#define DATA_TYPE_RAW_16BIT 0x2e
+#define DATA_TYPE_RAW_20BIT 0x2f
+
enum csid_payload_mode {
CSID_PAYLOAD_MODE_INCREMENTING = 0,
CSID_PAYLOAD_MODE_ALTERNATING_55_AA = 1,
--
2.27.0

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Next in thread: Robert Foss: "[PATCH v9 16/22] dt-bindings: media: camss: Add qcom,sdm660-camss binding"
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