Re: [PATCH v4 09/11] media: hantro: IMX8M: add variant for G2/HEVC codec

[Ezequiel Garcia <ezequiel@collabora.com>]

On Wed, 2021-03-03 at 12:39 +0100, Benjamin Gaignard wrote:
> Add variant to IMX8M to enable G2/HEVC codec.
> Define the capabilities for the hardware up to 3840x2160.
> Retrieve the hardware version at init to distinguish G1 from G2.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
> version 2:
> - remove useless clocks
> 
>  drivers/staging/media/hantro/hantro_drv.c   |  1 +
>  drivers/staging/media/hantro/hantro_hw.h    |  1 +
>  drivers/staging/media/hantro/imx8m_vpu_hw.c | 95 ++++++++++++++++++++-
>  3 files changed, 93 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
> index bc90a52f4d3d..976be7b6ecfb 100644
> --- a/drivers/staging/media/hantro/hantro_drv.c
> +++ b/drivers/staging/media/hantro/hantro_drv.c
> @@ -591,6 +591,7 @@ static const struct of_device_id of_hantro_match[] = {
>  #endif
>  #ifdef CONFIG_VIDEO_HANTRO_IMX8M
>         { .compatible = "nxp,imx8mq-vpu", .data = &imx8mq_vpu_variant, },
> +       { .compatible = "nxp,imx8mq-vpu-g2", .data = &imx8mq_vpu_g2_variant },
>  #endif
>         { /* sentinel */ }
>  };
> diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h
> index dade3b0769c1..f61f58da05fe 100644
> --- a/drivers/staging/media/hantro/hantro_hw.h
> +++ b/drivers/staging/media/hantro/hantro_hw.h
> @@ -193,6 +193,7 @@ extern const struct hantro_variant rk3399_vpu_variant;
>  extern const struct hantro_variant rk3328_vpu_variant;
>  extern const struct hantro_variant rk3288_vpu_variant;
>  extern const struct hantro_variant imx8mq_vpu_variant;
> +extern const struct hantro_variant imx8mq_vpu_g2_variant;
>  
>  extern const struct hantro_postproc_regs hantro_g1_postproc_regs;
>  
> diff --git a/drivers/staging/media/hantro/imx8m_vpu_hw.c b/drivers/staging/media/hantro/imx8m_vpu_hw.c
> index d5b4312b9391..46b33531be85 100644
> --- a/drivers/staging/media/hantro/imx8m_vpu_hw.c
> +++ b/drivers/staging/media/hantro/imx8m_vpu_hw.c
> @@ -12,6 +12,7 @@
>  #include "hantro.h"
>  #include "hantro_jpeg.h"
>  #include "hantro_g1_regs.h"
> +#include "hantro_g2_regs.h"
>  
>  static int imx8mq_runtime_resume(struct hantro_dev *vpu)
>  {
> @@ -90,6 +91,26 @@ static const struct hantro_fmt imx8m_vpu_dec_fmts[] = {
>         },
>  };
>  
> +static const struct hantro_fmt imx8m_vpu_g2_dec_fmts[] = {
> +       {
> +               .fourcc = V4L2_PIX_FMT_NV12,
> +               .codec_mode = HANTRO_MODE_NONE,
> +       },
> +       {
> +               .fourcc = V4L2_PIX_FMT_HEVC_SLICE,
> +               .codec_mode = HANTRO_MODE_HEVC_DEC,
> +               .max_depth = 2,
> +               .frmsize = {
> +                       .min_width = 48,
> +                       .max_width = 3840,
> +                       .step_width = MB_DIM,
> +                       .min_height = 48,
> +                       .max_height = 2160,
> +                       .step_height = MB_DIM,
> +               },
> +       },
> +};
> +
>  static irqreturn_t imx8m_vpu_g1_irq(int irq, void *dev_id)
>  {
>         struct hantro_dev *vpu = dev_id;
> @@ -108,9 +129,42 @@ static irqreturn_t imx8m_vpu_g1_irq(int irq, void *dev_id)
>         return IRQ_HANDLED;
>  }
>  
> +static irqreturn_t imx8m_vpu_g2_irq(int irq, void *dev_id)
> +{
> +       struct hantro_dev *vpu = dev_id;
> +       enum vb2_buffer_state state;
> +       u32 status;
> +
> +       status = vdpu_read(vpu, HEVC_REG_INTERRUPT);
> +       state = (status & HEVC_REG_INTERRUPT_DEC_RDY_INT) ?
> +                VB2_BUF_STATE_DONE : VB2_BUF_STATE_ERROR;
> +
> +       vdpu_write(vpu, 0, HEVC_REG_INTERRUPT);
> +       vdpu_write(vpu, HEVC_REG_CONFIG_DEC_CLK_GATE_E, HEVC_REG_CONFIG);

Is this clock gate enable needed on each interrupt?

> +
> +       hantro_irq_done(vpu, state);
> +
> +       return IRQ_HANDLED;
> +}
> +
>  static int imx8mq_vpu_hw_init(struct hantro_dev *vpu)
>  {
> -       vpu->dec_base = vpu->reg_bases[0];
> +       int ret;
> +
> +       /* Check variant version */
> +       ret = clk_bulk_prepare_enable(vpu->variant->num_clocks, vpu->clocks);
> +       if (ret) {
> +               dev_err(vpu->dev, "Failed to enable clocks\n");
> +               return ret;
> +       }
> +
> +       /* Make that the device has been reset before read it id */
> +       ret = device_reset(vpu->dev);
> +       if (ret)
> +               dev_err(vpu->dev, "Failed to reset Hantro VPU\n");
> +
> +       vpu->core_hw_dec_rev = (vdpu_read(vpu, HEVC_REG_VERSION) >> 16) & 0xffff;
> +       clk_bulk_disable_unprepare(vpu->variant->num_clocks, vpu->clocks);
>  
>         return 0;
>  }
> @@ -149,17 +203,32 @@ static const struct hantro_codec_ops imx8mq_vpu_codec_ops[] = {
>         },
>  };
>  
> +static const struct hantro_codec_ops imx8mq_vpu_g2_codec_ops[] = {
> +       [HANTRO_MODE_HEVC_DEC] = {
> +               .run = hantro_g2_hevc_dec_run,
> +               .reset = imx8mq_vpu_reset,
> +               .init = hantro_hevc_dec_init,
> +               .exit = hantro_hevc_dec_exit,
> +       },
> +};
> +
>  /*
>   * VPU variants.
>   */
>  
>  static const struct hantro_irq imx8mq_irqs[] = {
>         { "g1", imx8m_vpu_g1_irq },
> -       { "g2", NULL /* TODO: imx8m_vpu_g2_irq */ },
>  };
>  
> -static const char * const imx8mq_clk_names[] = { "g1", "g2", "bus" };
> -static const char * const imx8mq_reg_names[] = { "g1", "g2", "ctrl" };
> +static const struct hantro_irq imx8mq_g2_irqs[] = {
> +       { "g2", imx8m_vpu_g2_irq },
> +};
> +
> +static const char * const imx8mq_clk_names[] = { "g1", "bus"};
> +static const char * const imx8mq_reg_names[] = { "g1"};
> +
> +static const char * const imx8mq_g2_clk_names[] = { "g2", "bus"};
> +static const char * const imx8mq_g2_reg_names[] = { "g2"};
>  
>  const struct hantro_variant imx8mq_vpu_variant = {
>         .dec_fmts = imx8m_vpu_dec_fmts,
> @@ -179,3 +248,21 @@ const struct hantro_variant imx8mq_vpu_variant = {
>         .reg_names = imx8mq_reg_names,
>         .num_regs = ARRAY_SIZE(imx8mq_reg_names)
>  };
> +
> +const struct hantro_variant imx8mq_vpu_g2_variant = {
> +       .dec_offset = 0x0,
> +       .dec_fmts = imx8m_vpu_g2_dec_fmts,
> +       .num_dec_fmts = ARRAY_SIZE(imx8m_vpu_g2_dec_fmts),
> +       .postproc_fmts = imx8m_vpu_postproc_fmts,
> +       .num_postproc_fmts = ARRAY_SIZE(imx8m_vpu_postproc_fmts),

Is this postproc_fmts correct?

Thanks!
Ezequiel

> +       .codec = HANTRO_HEVC_DECODER,
> +       .codec_ops = imx8mq_vpu_g2_codec_ops,
> +       .init = imx8mq_vpu_hw_init,
> +       .runtime_resume = imx8mq_runtime_resume,
> +       .irqs = imx8mq_g2_irqs,
> +       .num_irqs = ARRAY_SIZE(imx8mq_g2_irqs),
> +       .clk_names = imx8mq_g2_clk_names,
> +       .num_clocks = ARRAY_SIZE(imx8mq_g2_clk_names),
> +       .reg_names = imx8mq_g2_reg_names,
> +       .num_regs = ARRAY_SIZE(imx8mq_g2_reg_names),
> +};