The Hantro G1 decoder is able to enable a post-processor
on the decoding pipeline, which can be used to perform
scaling and color conversion.

The post-processor is integrated to the decoder, and it's
possible to use it in a way that is completely transparent
to the user.

This commit enables color conversion via post-processing,
which means the driver now exposes YUV packed and RGB pixel
formats, in addition to NV12.

On the YUV-to-RGB path, the post-processing pipeline
allows to modify the image contrast, brigthness and saturation,
so additional user controls are added to expose them.

Signed-off-by: Ezequiel Garcia <ezequ...@collabora.com>
---
 drivers/staging/media/hantro/Makefile         |   1 +
 drivers/staging/media/hantro/hantro.h         |  23 +-
 drivers/staging/media/hantro/hantro_drv.c     |  24 +-
 .../staging/media/hantro/hantro_g1_h264_dec.c |   2 +-
 .../media/hantro/hantro_g1_mpeg2_dec.c        |   3 +-
 .../staging/media/hantro/hantro_g1_vp8_dec.c  |   2 +-
 drivers/staging/media/hantro/hantro_h264.c    |   7 +-
 drivers/staging/media/hantro/hantro_hw.h      |  11 +
 .../staging/media/hantro/hantro_postproc.c    | 316 ++++++++++++++++++
 drivers/staging/media/hantro/hantro_v4l2.c    |  21 +-
 drivers/staging/media/hantro/rk3288_vpu_hw.c  |  21 ++
 11 files changed, 420 insertions(+), 11 deletions(-)
 create mode 100644 drivers/staging/media/hantro/hantro_postproc.c

diff --git a/drivers/staging/media/hantro/Makefile 
b/drivers/staging/media/hantro/Makefile
index 5d6b0383d280..496b30c3c396 100644
--- a/drivers/staging/media/hantro/Makefile
+++ b/drivers/staging/media/hantro/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_VIDEO_HANTRO) += hantro-vpu.o
 hantro-vpu-y += \
                hantro_drv.o \
                hantro_v4l2.o \
+               hantro_postproc.o \
                hantro_h1_jpeg_enc.o \
                hantro_g1_h264_dec.o \
                hantro_g1_mpeg2_dec.o \
diff --git a/drivers/staging/media/hantro/hantro.h 
b/drivers/staging/media/hantro/hantro.h
index e8872f24e351..8446a1fa9ab9 100644
--- a/drivers/staging/media/hantro/hantro.h
+++ b/drivers/staging/media/hantro/hantro.h
@@ -237,6 +237,7 @@ struct hantro_ctx {
                          unsigned int bytesused);
 
        const struct hantro_codec_ops *codec_ops;
+       struct hantro_postproc_ctx postproc;
 
        /* Specific for particular codec modes. */
        union {
@@ -250,7 +251,8 @@ struct hantro_ctx {
 /**
  * struct hantro_fmt - information about supported video formats.
  * @name:      Human readable name of the format.
- * @fourcc:    FourCC code of the format. See V4L2_PIX_FMT_*.
+ * @fourcc:    FourCC code of the post-processed format. See V4L2_PIX_FMT_*.
+ * @dec_fourcc:        FourCC code of the native format. See V4L2_PIX_FMT_*.
  * @codec_mode:        Codec mode related to this format. See
  *             enum hantro_codec_mode.
  * @header_size: Optional header size. Currently used by JPEG encoder.
@@ -261,6 +263,7 @@ struct hantro_ctx {
 struct hantro_fmt {
        char *name;
        u32 fourcc;
+       u32 dec_fourcc;
        enum hantro_codec_mode codec_mode;
        int header_size;
        int max_depth;
@@ -387,4 +390,22 @@ hantro_h264_buffer_extra_size(unsigned int width, unsigned 
int height)
        return 128 * MB_WIDTH(width) * MB_HEIGHT(height);
 }
 
+static inline bool
+hantro_use_postproc(struct hantro_ctx *ctx)
+{
+       return ctx->vpu_dst_fmt->fourcc != ctx->vpu_dst_fmt->dec_fourcc;
+}
+
+static inline dma_addr_t
+hantro_get_dec_buf_addr(struct hantro_ctx *ctx, struct vb2_buffer *vb)
+{
+       if (hantro_use_postproc(ctx))
+               return ctx->postproc.dec_q[vb->index].dma;
+       return vb2_dma_contig_plane_dma_addr(vb, 0);
+}
+
+void hantro_postproc_setup(struct hantro_ctx *ctx);
+void hantro_postproc_free(struct hantro_ctx *ctx);
+int hantro_postproc_alloc(struct hantro_ctx *ctx);
+
 #endif /* HANTRO_H_ */
diff --git a/drivers/staging/media/hantro/hantro_drv.c 
b/drivers/staging/media/hantro/hantro_drv.c
index f550b68d46ca..300178562014 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -53,7 +53,7 @@ dma_addr_t hantro_get_ref(struct hantro_ctx *ctx, u64 ts)
        if (index < 0)
                return 0;
        buf = vb2_get_buffer(q, index);
-       return vb2_dma_contig_plane_dma_addr(buf, 0);
+       return hantro_get_dec_buf_addr(ctx, buf);
 }
 
 static int
@@ -165,6 +165,9 @@ void hantro_finish_run(struct hantro_ctx *ctx)
 {
        struct vb2_v4l2_buffer *src_buf;
 
+       if (hantro_use_postproc(ctx))
+               hantro_postproc_setup(ctx);
+
        src_buf = hantro_get_src_buf(ctx);
        v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req,
                                   &ctx->ctrl_handler);
@@ -365,8 +368,9 @@ static int hantro_ctrls_setup(struct hantro_dev *vpu,
                              int allowed_codecs)
 {
        int i, num_ctrls = ARRAY_SIZE(controls);
+       int postproc_ctrls = (allowed_codecs & HANTRO_DECODERS) ? 3 : 0;
 
-       v4l2_ctrl_handler_init(&ctx->ctrl_handler, num_ctrls);
+       v4l2_ctrl_handler_init(&ctx->ctrl_handler, num_ctrls + postproc_ctrls);
 
        for (i = 0; i < num_ctrls; i++) {
                if (!(allowed_codecs & controls[i].codec))
@@ -382,6 +386,22 @@ static int hantro_ctrls_setup(struct hantro_dev *vpu,
                        return ctx->ctrl_handler.error;
                }
        }
+
+       /*
+        * Add post-processing controls.
+        * Only used if the post-processing path is enabled,
+        * when the application sets a CAPTURE pixel format
+        * that requires it.
+        */
+       if (postproc_ctrls) {
+               v4l2_ctrl_new_std(&ctx->ctrl_handler, NULL,
+                                 V4L2_CID_CONTRAST, -64, 64, 1, 0);
+               v4l2_ctrl_new_std(&ctx->ctrl_handler, NULL,
+                                 V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+               v4l2_ctrl_new_std(&ctx->ctrl_handler, NULL,
+                                 V4L2_CID_SATURATION, -64, 128, 1, 0);
+       }
+
        return v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 }
 
diff --git a/drivers/staging/media/hantro/hantro_g1_h264_dec.c 
b/drivers/staging/media/hantro/hantro_g1_h264_dec.c
index 29130946dea4..e263a6b50651 100644
--- a/drivers/staging/media/hantro/hantro_g1_h264_dec.c
+++ b/drivers/staging/media/hantro/hantro_g1_h264_dec.c
@@ -241,7 +241,7 @@ static void set_buffers(struct hantro_ctx *ctx)
        vdpu_write_relaxed(vpu, src_dma, G1_REG_ADDR_STR);
 
        /* Destination (decoded frame) buffer. */
-       dst_dma = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
+       dst_dma = hantro_get_dec_buf_addr(ctx, &dst_buf->vb2_buf);
        vdpu_write_relaxed(vpu, dst_dma, G1_REG_ADDR_DST);
 
        /* Higher profiles require DMV buffer appended to reference frames. */
diff --git a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c 
b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
index f3bf67d8a289..63fe89ef21ae 100644
--- a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
+++ b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
@@ -121,7 +121,7 @@ hantro_g1_mpeg2_dec_set_buffers(struct hantro_dev *vpu, 
struct hantro_ctx *ctx,
        vdpu_write_relaxed(vpu, addr, G1_REG_RLC_VLC_BASE);
 
        /* Destination frame buffer */
-       addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
+       addr = hantro_get_dec_buf_addr(ctx, dst_buf);
        current_addr = addr;
 
        if (picture->picture_structure == PICT_BOTTOM_FIELD)
@@ -243,7 +243,6 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
        hantro_g1_mpeg2_dec_set_buffers(vpu, ctx, &src_buf->vb2_buf,
                                        &dst_buf->vb2_buf,
                                        sequence, picture, slice_params);
-
        hantro_finish_run(ctx);
 
        reg = G1_REG_DEC_E(1);
diff --git a/drivers/staging/media/hantro/hantro_g1_vp8_dec.c 
b/drivers/staging/media/hantro/hantro_g1_vp8_dec.c
index cad18094fee0..e708994d1aba 100644
--- a/drivers/staging/media/hantro/hantro_g1_vp8_dec.c
+++ b/drivers/staging/media/hantro/hantro_g1_vp8_dec.c
@@ -422,7 +422,7 @@ static void cfg_buffers(struct hantro_ctx *ctx,
        }
        vdpu_write_relaxed(vpu, reg, G1_REG_FWD_PIC(0));
 
-       dst_dma = vb2_dma_contig_plane_dma_addr(&vb2_dst->vb2_buf, 0);
+       dst_dma = hantro_get_dec_buf_addr(ctx, &vb2_dst->vb2_buf);
        vdpu_write_relaxed(vpu, dst_dma, G1_REG_ADDR_DST);
 }
 
diff --git a/drivers/staging/media/hantro/hantro_h264.c 
b/drivers/staging/media/hantro/hantro_h264.c
index 2227b4e12067..d00b3096b7ae 100644
--- a/drivers/staging/media/hantro/hantro_h264.c
+++ b/drivers/staging/media/hantro/hantro_h264.c
@@ -13,6 +13,7 @@
 #include <linux/types.h>
 #include <linux/sort.h>
 #include <media/v4l2-mem2mem.h>
+#include <media/v4l2-common.h>
 
 #include "hantro.h"
 #include "hantro_hw.h"
@@ -635,7 +636,11 @@ int hantro_h264_dec_init(struct hantro_ctx *ctx)
        tbl = priv->cpu;
        memcpy(tbl->cabac_table, h264_cabac_table, sizeof(tbl->cabac_table));
 
-       v4l2_fill_pixfmt_mp(&pix_mp, ctx->dst_fmt.pixelformat,
+       /*
+        * For the decoder picture size, we want the decoder
+        * native pixel format, so we use dec_fourcc here.
+        */
+       v4l2_fill_pixfmt_mp(&pix_mp, ctx->vpu_dst_fmt->dec_fourcc,
                            ctx->dst_fmt.width, ctx->dst_fmt.height);
        h264_dec->pic_size = pix_mp.plane_fmt[0].sizeimage;
 
diff --git a/drivers/staging/media/hantro/hantro_hw.h 
b/drivers/staging/media/hantro/hantro_hw.h
index 69b88f4d3fb3..ae1d869e7c28 100644
--- a/drivers/staging/media/hantro/hantro_hw.h
+++ b/drivers/staging/media/hantro/hantro_hw.h
@@ -28,11 +28,13 @@ struct hantro_variant;
  * @cpu:       CPU pointer to the buffer.
  * @dma:       DMA address of the buffer.
  * @size:      Size of the buffer.
+ * @attrs:     Attributes of the DMA mapping.
  */
 struct hantro_aux_buf {
        void *cpu;
        dma_addr_t dma;
        size_t size;
+       unsigned long attrs;
 };
 
 /**
@@ -109,6 +111,15 @@ struct hantro_vp8_dec_hw_ctx {
        struct hantro_aux_buf prob_tbl;
 };
 
+/**
+ * struct hantro_postproc_ctx
+ *
+ * @dec_q:             References buffers, in decoder format.
+ */
+struct hantro_postproc_ctx {
+       struct hantro_aux_buf dec_q[VB2_MAX_FRAME];
+};
+
 /**
  * struct hantro_codec_ops - codec mode specific operations
  *
diff --git a/drivers/staging/media/hantro/hantro_postproc.c 
b/drivers/staging/media/hantro/hantro_postproc.c
new file mode 100644
index 000000000000..17d023a253a8
--- /dev/null
+++ b/drivers/staging/media/hantro/hantro_postproc.c
@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Hantro G1 post-processor support
+ *
+ * Copyright (C) 2019 Collabora, Ltd.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/types.h>
+
+#include "hantro.h"
+#include "hantro_hw.h"
+
+#define G1_SWREG(nr)           ((nr) * 4)
+
+#define G1_REG_PP_INTERRUPT            G1_SWREG(60)
+#define    G1_REG_PP_READY_IRQ         BIT(12)
+#define    G1_REG_PP_IRQ               BIT(8)
+#define    G1_REG_PP_IRQ_DIS           BIT(4)
+#define    G1_REG_PP_PIPELINE_EN       BIT(1)
+#define    G1_REG_PP_EXTERNAL_TRIGGER  BIT(0)
+#define G1_REG_PP_DEV_CONFIG           G1_SWREG(61)
+#define     G1_REG_PP_AXI_RD_ID(v)     (((v) << 24) & GENMASK(31, 24))
+#define     G1_REG_PP_AXI_WR_ID(v)     (((v) << 16) & GENMASK(23, 16))
+#define     G1_REG_PP_INSWAP32_E(v)    ((v) ? BIT(10) : 0)
+#define     G1_REG_PP_DATA_DISC_E(v)   ((v) ? BIT(9) : 0)
+#define     G1_REG_PP_CLK_GATE_E(v)    ((v) ? BIT(8) : 0)
+#define     G1_REG_PP_IN_ENDIAN(v)     ((v) ? BIT(7) : 0)
+#define     G1_REG_PP_OUT_ENDIAN(v)    ((v) ? BIT(6) : 0)
+#define     G1_REG_PP_OUTSWAP32_E(v)   ((v) ? BIT(5) : 0)
+#define     G1_REG_PP_MAX_BURST(v)     (((v) << 0) & GENMASK(4, 0))
+#define G1_REG_PP_IN_LUMA_BASE         G1_SWREG(63)
+#define G1_REG_PP_IN_CB_BASE           G1_SWREG(64)
+#define G1_REG_PP_IN_CR_BASE           G1_SWREG(65)
+#define G1_REG_PP_OUT_LUMA_BASE                G1_SWREG(66)
+#define G1_REG_PP_OUT_CHROMA_BASE      G1_SWREG(67)
+#define G1_REG_PP_CONTRAST_ADJUST      G1_SWREG(68)
+#define G1_REG_PP_COLOR_CONVERSION     G1_SWREG(69)
+#define G1_REG_PP_COLOR_CONVERSION0    G1_SWREG(70)
+#define G1_REG_PP_COLOR_CONVERSION1    G1_SWREG(71)
+#define G1_REG_PP_INPUT_SIZE           G1_SWREG(72)
+#define    G1_REG_PP_INPUT_SIZE_HEIGHT(v) (((v) << 9) & GENMASK(16, 9))
+#define    G1_REG_PP_INPUT_SIZE_WIDTH(v)  (((v) << 0) & GENMASK(8, 0))
+#define G1_REG_PP_SCALING0             G1_SWREG(79)
+#define     G1_REG_PP_PADD_R(v)        (((v) << 23) & GENMASK(27, 23))
+#define     G1_REG_PP_PADD_G(v)        (((v) << 18) & GENMASK(22, 18))
+#define     G1_REG_PP_RANGEMAP_Y(v) ((v) ? BIT(31) : 0)
+#define     G1_REG_PP_RANGEMAP_C(v) ((v) ? BIT(30) : 0)
+#define     G1_REG_PP_YCBCR_RANGE(v) ((v) ? BIT(29) : 0)
+#define     G1_REG_PP_RGB_16(v) ((v) ? BIT(28) : 0)
+#define G1_REG_PP_SCALING1             G1_SWREG(80)
+#define     G1_REG_PP_PADD_B(v)        (((v) << 18) & GENMASK(22, 18))
+#define G1_REG_PP_MASK_R               G1_SWREG(82)
+#define G1_REG_PP_MASK_G               G1_SWREG(83)
+#define G1_REG_PP_MASK_B               G1_SWREG(84)
+#define G1_REG_PP_CONTROL              G1_SWREG(85)
+#define     G1_REG_PP_CONTROL_IN_FMT(v)        (((v) << 29) & GENMASK(31, 29))
+#define     G1_REG_PP_CONTROL_OUT_FMT(v) (((v) << 26) & GENMASK(28, 26))
+#define     G1_REG_PP_CONTROL_OUT_HEIGHT(v) (((v) << 15) & GENMASK(25, 15))
+#define     G1_REG_PP_CONTROL_OUT_WIDTH(v) (((v) << 4) & GENMASK(14, 4))
+#define G1_REG_PP_MASK1_ORIG_WIDTH     G1_SWREG(88)
+#define     G1_REG_PP_ORIG_WIDTH(v)    (((v) << 23) & GENMASK(31, 23))
+#define G1_REG_PP_DISPLAY_WIDTH                G1_SWREG(92)
+#define G1_REG_PP_FUSE                 G1_SWREG(99)
+
+#define VPU_PP_IN_YUYV                 0x0
+#define VPU_PP_IN_NV12                 0x1
+#define VPU_PP_IN_YUV420               0x2
+#define VPU_PP_IN_YUV240_TILED         0x5
+#define VPU_PP_OUT_RGB                 0x0
+#define VPU_PP_OUT_YUYV                        0x3
+
+#define DEF_COLOR_COEFF_A 298
+#define DEF_COLOR_COEFF_B 409
+#define DEF_COLOR_COEFF_C 208
+#define DEF_COLOR_COEFF_D 100
+#define DEF_COLOR_COEFF_E 516
+
+static const struct hantro_reg reg_color_a2 = { G1_REG_PP_COLOR_CONVERSION, 
18, 0x3ff };
+static const struct hantro_reg reg_color_a1 = { G1_REG_PP_COLOR_CONVERSION, 8, 
0x3ff };
+static const struct hantro_reg reg_color_b = { G1_REG_PP_COLOR_CONVERSION0, 0, 
0x3ff };
+static const struct hantro_reg reg_color_c = { G1_REG_PP_COLOR_CONVERSION0, 
10, 0x3ff };
+static const struct hantro_reg reg_color_d = { G1_REG_PP_COLOR_CONVERSION0, 
20, 0x3ff };
+static const struct hantro_reg reg_color_e = { G1_REG_PP_COLOR_CONVERSION1, 0, 
0x3ff };
+static const struct hantro_reg reg_color_f = { G1_REG_PP_COLOR_CONVERSION1, 
10, 0xff };
+static const struct hantro_reg reg_contrast_thr1 = { 
G1_REG_PP_CONTRAST_ADJUST, 24, 0xff };
+static const struct hantro_reg reg_contrast_thr2 = { 
G1_REG_PP_COLOR_CONVERSION, 0, 0xff };
+static const struct hantro_reg reg_contrast_off1 = { 
G1_REG_PP_CONTRAST_ADJUST, 0, 0x3ff };
+static const struct hantro_reg reg_contrast_off2 = { 
G1_REG_PP_CONTRAST_ADJUST, 10, 0x3ff };
+static const struct hantro_reg reg_ycbcr_range = { G1_REG_PP_SCALING0, 29, 0x1 
};
+static const struct hantro_reg reg_pad_r = { G1_REG_PP_SCALING0, 23, 0x1f };
+static const struct hantro_reg reg_pad_g = { G1_REG_PP_SCALING0, 18, 0x1f };
+static const struct hantro_reg reg_pad_b = { G1_REG_PP_SCALING1, 18, 0x1f };
+
+static s32 hantro_postproc_get_ctrl(struct hantro_ctx *ctx, u32 id, s32 
def_val)
+{
+       struct v4l2_ctrl *ctrl;
+
+       ctrl = v4l2_ctrl_find(&ctx->ctrl_handler, id);
+       if (!ctrl)
+               return def_val;
+       return v4l2_ctrl_g_ctrl(ctrl);
+}
+
+static void hantro_postproc_setup_rgb(struct hantro_ctx *ctx)
+{
+       struct hantro_dev *vpu = ctx->dev;
+       s32 thr1y, thr2y;
+       s32 thr1, thr2;
+       s32 off1, off2;
+       s32 a1, a2;
+       s32 tmp, satur;
+       s32 contrast, saturation, brightness;
+
+       contrast = hantro_postproc_get_ctrl(ctx, V4L2_CID_CONTRAST, 0);
+       brightness = hantro_postproc_get_ctrl(ctx, V4L2_CID_BRIGHTNESS, 0);
+       saturation = hantro_postproc_get_ctrl(ctx, V4L2_CID_SATURATION, 0);
+
+       if (ctx->src_fmt.quantization == V4L2_QUANTIZATION_LIM_RANGE) {
+               s32 tmp1, tmp2;
+
+               thr1 = (219 * (contrast + 128)) / 512;
+               thr1y = (219 - 2 * thr1) / 2;
+               thr2 = 219 - thr1;
+               thr2y = 219 - thr1y;
+
+               tmp1 = (thr1y * 256) / thr1;
+               tmp2 = ((thr2y - thr1y) * 256) / (thr2 - thr1);
+               off1 = ((thr1y - ((tmp2 * thr1) / 256)) * 
(s32)DEF_COLOR_COEFF_A) / 256;
+               off2 = ((thr2y - ((tmp1 * thr2) / 256)) * 
(s32)DEF_COLOR_COEFF_A) / 256;
+
+               tmp1 = (64 * (contrast + 128)) / 128;
+               tmp2 = 256 * (128 - tmp1);
+               a1 = (tmp2 + off2) / thr1;
+               a2 = a1 + (256 * (off2 - 1)) / (thr2 - thr1);
+       } else {
+               thr1 = (64 * (contrast + 128)) / 128;
+               thr1y = 128 - thr1;
+               thr2 = 256 - thr1;
+               thr2y = 256 - thr1y;
+               a1 = (thr1y * 256) / thr1;
+               a2 = ((thr2y - thr1y) * 256) / (thr2 - thr1);
+               off1 = thr1y - (a2 * thr1) / 256;
+               off2 = thr2y - (a1 * thr2) / 256;
+       }
+
+       a1 = clamp(a1, 0, 1023);
+       a2 = clamp(a2, 0, 1023);
+       thr1 = clamp(thr1, 0, 255);
+       thr2 = clamp(thr2, 0, 255);
+       off1 = clamp(off1, -512, 511);
+       off2 = clamp(off2, -512, 511);
+
+       hantro_reg_write(vpu, &reg_contrast_thr1, thr1);
+       hantro_reg_write(vpu, &reg_contrast_thr2, thr2);
+       hantro_reg_write(vpu, &reg_contrast_off1, off1);
+       hantro_reg_write(vpu, &reg_contrast_off2, off2);
+       hantro_reg_write(vpu, &reg_color_a1, a1);
+       hantro_reg_write(vpu, &reg_color_a2, a2);
+
+       /* Brightness */
+       hantro_reg_write(vpu, &reg_color_f, brightness);
+
+       /* Saturation */
+       satur = 64 + saturation;
+       tmp = (satur * (s32)DEF_COLOR_COEFF_B) / 64;
+       tmp = clamp(tmp, 0, 1023);
+       hantro_reg_write(vpu, &reg_color_b, tmp);
+
+       tmp = (satur * (s32)DEF_COLOR_COEFF_C) / 64;
+       tmp = clamp(tmp, 0, 1023);
+       hantro_reg_write(vpu, &reg_color_c, tmp);
+
+       tmp = (satur * (s32)DEF_COLOR_COEFF_D) / 64;
+       tmp = clamp(tmp, 0, 1023);
+       hantro_reg_write(vpu, &reg_color_d, tmp);
+
+       tmp = (satur * (s32)DEF_COLOR_COEFF_E) / 64;
+       tmp = clamp(tmp, 0, 1023);
+       hantro_reg_write(vpu, &reg_color_e, tmp);
+
+       /* Set RGB padding and mask */
+       switch (ctx->vpu_dst_fmt->fourcc) {
+       case V4L2_PIX_FMT_RGBX32:
+               hantro_reg_write(vpu, &reg_pad_r, 0);
+               hantro_reg_write(vpu, &reg_pad_g, 8);
+               hantro_reg_write(vpu, &reg_pad_b, 16);
+
+               vdpu_write_relaxed(vpu, 0xff000000, G1_REG_PP_MASK_R);
+               vdpu_write_relaxed(vpu, 0x00ff0000, G1_REG_PP_MASK_G);
+               vdpu_write_relaxed(vpu, 0x0000ff00, G1_REG_PP_MASK_B);
+               break;
+       case V4L2_PIX_FMT_XRGB32:
+               hantro_reg_write(vpu, &reg_pad_r, 8);
+               hantro_reg_write(vpu, &reg_pad_g, 16);
+               hantro_reg_write(vpu, &reg_pad_b, 24);
+
+               vdpu_write_relaxed(vpu, 0x00ff0000, G1_REG_PP_MASK_R);
+               vdpu_write_relaxed(vpu, 0x0000ff00, G1_REG_PP_MASK_G);
+               vdpu_write_relaxed(vpu, 0x000000ff, G1_REG_PP_MASK_B);
+               break;
+       case V4L2_PIX_FMT_XBGR32:
+               hantro_reg_write(vpu, &reg_pad_b, 0);
+               hantro_reg_write(vpu, &reg_pad_g, 8);
+               hantro_reg_write(vpu, &reg_pad_r, 16);
+
+               vdpu_write_relaxed(vpu, 0xff000000, G1_REG_PP_MASK_B);
+               vdpu_write_relaxed(vpu, 0x00ff0000, G1_REG_PP_MASK_G);
+               vdpu_write_relaxed(vpu, 0x0000ff00, G1_REG_PP_MASK_R);
+               break;
+       }
+}
+
+void hantro_postproc_setup(struct hantro_ctx *ctx)
+{
+       struct hantro_dev *vpu = ctx->dev;
+       struct vb2_v4l2_buffer *dst_buf;
+       u32 reg, src_pp_fmt, dst_pp_fmt;
+       dma_addr_t dst_dma;
+
+       /* Turn on pipeline mode. Must be done first. */
+       vdpu_write(vpu, G1_REG_PP_PIPELINE_EN, G1_REG_PP_INTERRUPT);
+
+       reg = G1_REG_PP_AXI_RD_ID(0) |
+             G1_REG_PP_AXI_WR_ID(0) |
+             G1_REG_PP_INSWAP32_E(1) |
+             G1_REG_PP_OUTSWAP32_E(1) |
+             G1_REG_PP_DATA_DISC_E(0) |
+             G1_REG_PP_CLK_GATE_E(1) |
+             G1_REG_PP_IN_ENDIAN(1) |
+             G1_REG_PP_OUT_ENDIAN(1) |
+             G1_REG_PP_MAX_BURST(16);
+       vdpu_write_relaxed(vpu, reg, G1_REG_PP_DEV_CONFIG);
+
+       /* Configure picture resolution. */
+       reg = G1_REG_PP_INPUT_SIZE_HEIGHT(MB_HEIGHT(ctx->dst_fmt.height)) |
+             G1_REG_PP_INPUT_SIZE_WIDTH(MB_WIDTH(ctx->dst_fmt.width));
+       vdpu_write_relaxed(vpu, reg, G1_REG_PP_INPUT_SIZE);
+
+       dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+       dst_dma = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
+       vdpu_write_relaxed(vpu, dst_dma, G1_REG_PP_OUT_LUMA_BASE);
+
+       reg = (ctx->dst_fmt.quantization ==
+              V4L2_QUANTIZATION_LIM_RANGE) ? 0 : 1;
+       hantro_reg_write(vpu, &reg_ycbcr_range, reg);
+
+       /* Clear this register before setting the RGB coefficients. */
+       vdpu_write_relaxed(vpu, 0, G1_REG_PP_SCALING1);
+
+       switch (ctx->vpu_dst_fmt->fourcc) {
+       case V4L2_PIX_FMT_YUYV:
+               dst_pp_fmt = VPU_PP_OUT_YUYV;
+               break;
+       case V4L2_PIX_FMT_RGBX32:
+       case V4L2_PIX_FMT_XRGB32:
+       case V4L2_PIX_FMT_XBGR32:
+               dst_pp_fmt = VPU_PP_OUT_RGB;
+               hantro_postproc_setup_rgb(ctx);
+               break;
+       default:
+               return;
+       }
+
+       /* Currently NV12 is the only supported input pixel format. */
+       src_pp_fmt = VPU_PP_IN_NV12;
+
+       /* Configure src/dst post-processor formats. */
+       reg = G1_REG_PP_CONTROL_IN_FMT(src_pp_fmt) |
+             G1_REG_PP_CONTROL_OUT_FMT(dst_pp_fmt) |
+             G1_REG_PP_CONTROL_OUT_HEIGHT(ctx->dst_fmt.height) |
+             G1_REG_PP_CONTROL_OUT_WIDTH(ctx->dst_fmt.width);
+       vdpu_write_relaxed(vpu, reg, G1_REG_PP_CONTROL);
+
+       reg = G1_REG_PP_ORIG_WIDTH(MB_WIDTH(ctx->dst_fmt.width));
+       vdpu_write_relaxed(vpu, reg, G1_REG_PP_MASK1_ORIG_WIDTH);
+       vdpu_write_relaxed(vpu, ctx->dst_fmt.width, G1_REG_PP_DISPLAY_WIDTH);
+}
+
+void hantro_postproc_free(struct hantro_ctx *ctx)
+{
+       struct hantro_dev *vpu = ctx->dev;
+       unsigned int i;
+
+       for (i = 0; i < VB2_MAX_FRAME; ++i) {
+               struct hantro_aux_buf *priv = &ctx->postproc.dec_q[i];
+
+               if (priv->cpu) {
+                       dma_free_attrs(vpu->dev, priv->size, priv->cpu,
+                                      priv->dma, priv->attrs);
+                       priv->cpu = NULL;
+               }
+       }
+}
+
+int hantro_postproc_alloc(struct hantro_ctx *ctx)
+{
+       struct hantro_dev *vpu = ctx->dev;
+       unsigned int i, buf_size;
+
+       buf_size = ctx->dst_fmt.plane_fmt[0].sizeimage;
+
+       for (i = 0; i < VB2_MAX_FRAME; ++i) {
+               struct hantro_aux_buf *priv = &ctx->postproc.dec_q[i];
+
+               priv->attrs = DMA_ATTR_NO_KERNEL_MAPPING |
+                             DMA_ATTR_WRITE_COMBINE |
+                             DMA_ATTR_NON_CONSISTENT;
+               priv->cpu = dma_alloc_attrs(vpu->dev, buf_size, &priv->dma,
+                                           GFP_KERNEL, priv->attrs);
+               if (!priv->cpu)
+                       return -ENOMEM;
+               priv->size = buf_size;
+       }
+       return 0;
+}
diff --git a/drivers/staging/media/hantro/hantro_v4l2.c 
b/drivers/staging/media/hantro/hantro_v4l2.c
index 59adecba0e85..37a9ba71afa6 100644
--- a/drivers/staging/media/hantro/hantro_v4l2.c
+++ b/drivers/staging/media/hantro/hantro_v4l2.c
@@ -242,9 +242,10 @@ static int vidioc_try_fmt(struct file *file, void *priv, 
struct v4l2_format *f,
                /*
                 * The H264 decoder needs extra space on the output buffers
                 * to store motion vectors. This is needed for reference
-                * frames.
+                * frames and only if the format is non-post-processed (NV12).
                 */
-               if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_H264_SLICE)
+               if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_H264_SLICE &&
+                   fmt->fourcc == V4L2_PIX_FMT_NV12)
                        pix_mp->plane_fmt[0].sizeimage +=
                                hantro_h264_buffer_extra_size(pix_mp->width,
                                                              pix_mp->height);
@@ -634,10 +635,23 @@ static int hantro_start_streaming(struct vb2_queue *q, 
unsigned int count)
 
                vpu_debug(4, "Codec mode = %d\n", codec_mode);
                ctx->codec_ops = &ctx->dev->variant->codec_ops[codec_mode];
-               if (ctx->codec_ops->init)
+               if (ctx->codec_ops->init) {
                        ret = ctx->codec_ops->init(ctx);
+                       if (ret)
+                               return ret;
+               }
+
+               if (hantro_use_postproc(ctx)) {
+                       ret = hantro_postproc_alloc(ctx);
+                       if (ret)
+                               goto err_codec_exit;
+               }
        }
+       return ret;
 
+err_codec_exit:
+       if (ctx->codec_ops && ctx->codec_ops->exit)
+               ctx->codec_ops->exit(ctx);
        return ret;
 }
 
@@ -664,6 +678,7 @@ static void hantro_stop_streaming(struct vb2_queue *q)
        struct hantro_ctx *ctx = vb2_get_drv_priv(q);
 
        if (hantro_vq_is_coded(q)) {
+               hantro_postproc_free(ctx);
                if (ctx->codec_ops && ctx->codec_ops->exit)
                        ctx->codec_ops->exit(ctx);
        }
diff --git a/drivers/staging/media/hantro/rk3288_vpu_hw.c 
b/drivers/staging/media/hantro/rk3288_vpu_hw.c
index c0bdd6c02520..18d6b725309b 100644
--- a/drivers/staging/media/hantro/rk3288_vpu_hw.c
+++ b/drivers/staging/media/hantro/rk3288_vpu_hw.c
@@ -59,6 +59,27 @@ static const struct hantro_fmt rk3288_vpu_enc_fmts[] = {
 static const struct hantro_fmt rk3288_vpu_dec_fmts[] = {
        {
                .fourcc = V4L2_PIX_FMT_NV12,
+               .dec_fourcc = V4L2_PIX_FMT_NV12,
+               .codec_mode = HANTRO_MODE_NONE,
+       },
+       {
+               .fourcc = V4L2_PIX_FMT_RGBX32,
+               .dec_fourcc = V4L2_PIX_FMT_NV12,
+               .codec_mode = HANTRO_MODE_NONE,
+       },
+       {
+               .fourcc = V4L2_PIX_FMT_XRGB32,
+               .dec_fourcc = V4L2_PIX_FMT_NV12,
+               .codec_mode = HANTRO_MODE_NONE,
+       },
+       {
+               .fourcc = V4L2_PIX_FMT_XBGR32,
+               .dec_fourcc = V4L2_PIX_FMT_NV12,
+               .codec_mode = HANTRO_MODE_NONE,
+       },
+       {
+               .fourcc = V4L2_PIX_FMT_YUYV,
+               .dec_fourcc = V4L2_PIX_FMT_NV12,
                .codec_mode = HANTRO_MODE_NONE,
        },
        {
-- 
2.22.0

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