| Message ID | 1685036458-22683-7-git-send-email-quic_khsieh@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | add DSC 1.2 dpu supports | expand |
On 2023-05-25 10:40:54, Kuogee Hsieh wrote: > Add support for DSC 1.2 by providing the necessary hooks to program > the DPU DSC 1.2 encoder. > > Changes in v3: > -- fixed kernel test rebot report that "__iomem *off" is declared but not > used at dpu_hw_dsc_config_1_2() > -- unrolling thresh loops > > Changes in v4: > -- delete DPU_DSC_HW_REV_1_1 > -- delete off and used real register name directly > > Changes in v7: > -- replace offset with sblk->enc.base > -- replace ss with slice > > Changes in v8: > -- fixed checkpatch warning > > Changes in v9: > -- replaced __dsc_calc_ob_max_addr() with __dsc_calc_output_buf_max_addr() > -- replaced variable num_ss with num_softslice > -- remove inline from function declaration > > changes in v10: > -- rewording text of changes in v9 > -- replace DPU_DSC_NATIVE_422_EN with DPU_DSC_NATIVE_42x_EN > -- replace drm_dsc_calculate_flatness_det_thresh() with drm_dsc_flatness_det_thresh() > > Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Since I have given this code adequate comments, and have finally successfully used/tested it on SM8350 (Sony Xperia 5III): Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> Note that I did not explicitly check if the register writes match downstream or reference material. > --- > drivers/gpu/drm/msm/Makefile | 1 + > drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 31 +- > drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h | 14 +- > drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c | 387 +++++++++++++++++++++++++ > drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 7 +- > 5 files changed, 436 insertions(+), 4 deletions(-) > create mode 100644 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c > > diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile > index 7274c412..4c7195af2 100644 > --- a/drivers/gpu/drm/msm/Makefile > +++ b/drivers/gpu/drm/msm/Makefile > @@ -65,6 +65,7 @@ msm-$(CONFIG_DRM_MSM_DPU) += \ > disp/dpu1/dpu_hw_catalog.o \ > disp/dpu1/dpu_hw_ctl.o \ > disp/dpu1/dpu_hw_dsc.o \ > + disp/dpu1/dpu_hw_dsc_1_2.o \ > disp/dpu1/dpu_hw_interrupts.o \ > disp/dpu1/dpu_hw_intf.o \ > disp/dpu1/dpu_hw_lm.o \ > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h > index 83854e8..11610f7 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h > @@ -1,6 +1,6 @@ > /* SPDX-License-Identifier: GPL-2.0-only */ > /* > - * Copyright (c) 2022. Qualcomm Innovation Center, Inc. All rights reserved. > + * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved. > * Copyright (c) 2015-2018, 2020 The Linux Foundation. All rights reserved. > */ > > @@ -244,12 +244,18 @@ enum { > }; > > /** > - * DSC features > + * DSC sub-blocks/features > * @DPU_DSC_OUTPUT_CTRL Configure which PINGPONG block gets > * the pixel output from this DSC. > + * @DPU_DSC_HW_REV_1_2 DSC block supports DSC 1.1 and 1.2 > + * @DPU_DSC_NATIVE_42x_EN Supports NATIVE_422_EN and NATIVE_420_EN encoding > + * @DPU_DSC_MAX > */ > enum { > DPU_DSC_OUTPUT_CTRL = 0x1, > + DPU_DSC_HW_REV_1_2, > + DPU_DSC_NATIVE_42x_EN, > + DPU_DSC_MAX > }; > > /** > @@ -306,6 +312,14 @@ struct dpu_pp_blk { > }; > > /** > + * struct dpu_dsc_blk - DSC Encoder sub-blk information > + * @info: HW register and features supported by this sub-blk > + */ > +struct dpu_dsc_blk { > + DPU_HW_SUBBLK_INFO; > +}; > + > +/** > * enum dpu_qos_lut_usage - define QoS LUT use cases > */ > enum dpu_qos_lut_usage { > @@ -452,6 +466,16 @@ struct dpu_pingpong_sub_blks { > }; > > /** > + * struct dpu_dsc_sub_blks - DSC sub-blks > + * @enc: DSC encoder sub-block > + * @ctl: DSC controller sub-block > + */ > +struct dpu_dsc_sub_blks { > + struct dpu_dsc_blk enc; > + struct dpu_dsc_blk ctl; > +}; > + > +/** > * dpu_clk_ctrl_type - Defines top level clock control signals > */ > enum dpu_clk_ctrl_type { > @@ -605,10 +629,13 @@ struct dpu_merge_3d_cfg { > * struct dpu_dsc_cfg - information of DSC blocks > * @id enum identifying this block > * @base register offset of this block > + * @len: length of hardware block > * @features bit mask identifying sub-blocks/features > + * @sblk: sub-blocks information > */ > struct dpu_dsc_cfg { > DPU_HW_BLK_INFO; > + const struct dpu_dsc_sub_blks *sblk; > }; > > /** > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h > index 138080a..d5b597a 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h > @@ -1,5 +1,8 @@ > /* SPDX-License-Identifier: GPL-2.0-only */ > -/* Copyright (c) 2020-2022, Linaro Limited */ > +/* > + * Copyright (c) 2020-2022, Linaro Limited > + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved > + */ > > #ifndef _DPU_HW_DSC_H > #define _DPU_HW_DSC_H > @@ -69,6 +72,15 @@ struct dpu_hw_dsc *dpu_hw_dsc_init(const struct dpu_dsc_cfg *cfg, > void __iomem *addr); > > /** > + * dpu_hw_dsc_init_1_2() - initializes the v1.2 DSC hw driver object > + * @cfg: DSC catalog entry for which driver object is required > + * @addr: Mapped register io address of MDP > + * Returns: Error code or allocated dpu_hw_dsc context > + */ > +struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(const struct dpu_dsc_cfg *cfg, > + void __iomem *addr); > + > +/** > * dpu_hw_dsc_destroy - destroys dsc driver context > * @dsc: Pointer to dsc driver context returned by dpu_hw_dsc_init > */ > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c > new file mode 100644 > index 00000000..24fe1d9 > --- /dev/null > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c > @@ -0,0 +1,387 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. > + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved > + */ > + > +#include <drm/display/drm_dsc_helper.h> > + > +#include "dpu_kms.h" > +#include "dpu_hw_catalog.h" > +#include "dpu_hwio.h" > +#include "dpu_hw_mdss.h" > +#include "dpu_hw_dsc.h" > + > +#define DSC_CMN_MAIN_CNF 0x00 > + > +/* DPU_DSC_ENC register offsets */ > +#define ENC_DF_CTRL 0x00 > +#define ENC_GENERAL_STATUS 0x04 > +#define ENC_HSLICE_STATUS 0x08 > +#define ENC_OUT_STATUS 0x0C > +#define ENC_INT_STAT 0x10 > +#define ENC_INT_CLR 0x14 > +#define ENC_INT_MASK 0x18 > +#define DSC_MAIN_CONF 0x30 > +#define DSC_PICTURE_SIZE 0x34 > +#define DSC_SLICE_SIZE 0x38 > +#define DSC_MISC_SIZE 0x3C > +#define DSC_HRD_DELAYS 0x40 > +#define DSC_RC_SCALE 0x44 > +#define DSC_RC_SCALE_INC_DEC 0x48 > +#define DSC_RC_OFFSETS_1 0x4C > +#define DSC_RC_OFFSETS_2 0x50 > +#define DSC_RC_OFFSETS_3 0x54 > +#define DSC_RC_OFFSETS_4 0x58 > +#define DSC_FLATNESS_QP 0x5C > +#define DSC_RC_MODEL_SIZE 0x60 > +#define DSC_RC_CONFIG 0x64 > +#define DSC_RC_BUF_THRESH_0 0x68 > +#define DSC_RC_BUF_THRESH_1 0x6C > +#define DSC_RC_BUF_THRESH_2 0x70 > +#define DSC_RC_BUF_THRESH_3 0x74 > +#define DSC_RC_MIN_QP_0 0x78 > +#define DSC_RC_MIN_QP_1 0x7C > +#define DSC_RC_MIN_QP_2 0x80 > +#define DSC_RC_MAX_QP_0 0x84 > +#define DSC_RC_MAX_QP_1 0x88 > +#define DSC_RC_MAX_QP_2 0x8C > +#define DSC_RC_RANGE_BPG_OFFSETS_0 0x90 > +#define DSC_RC_RANGE_BPG_OFFSETS_1 0x94 > +#define DSC_RC_RANGE_BPG_OFFSETS_2 0x98 > + > +/* DPU_DSC_CTL register offsets */ > +#define DSC_CTL 0x00 > +#define DSC_CFG 0x04 > +#define DSC_DATA_IN_SWAP 0x08 > +#define DSC_CLK_CTRL 0x0C > + > +static int _dsc_calc_output_buf_max_addr(struct dpu_hw_dsc *hw_dsc, int num_softslice) > +{ > + int max_addr = 2400 / num_softslice; > + > + if (hw_dsc->caps->features & BIT(DPU_DSC_NATIVE_42x_EN)) > + max_addr /= 2; > + > + return max_addr - 1; > +}; > + > +static void dpu_hw_dsc_disable_1_2(struct dpu_hw_dsc *hw_dsc) > +{ > + struct dpu_hw_blk_reg_map *hw; > + const struct dpu_dsc_sub_blks *sblk; > + > + if (!hw_dsc) > + return; > + > + hw = &hw_dsc->hw; > + sblk = hw_dsc->caps->sblk; > + DPU_REG_WRITE(hw, sblk->ctl.base + DSC_CFG, 0); > + > + DPU_REG_WRITE(hw, sblk->enc.base + ENC_DF_CTRL, 0); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_MAIN_CONF, 0); > +} > + > +static void dpu_hw_dsc_config_1_2(struct dpu_hw_dsc *hw_dsc, > + struct drm_dsc_config *dsc, > + u32 mode, > + u32 initial_lines) > +{ > + struct dpu_hw_blk_reg_map *hw; > + const struct dpu_dsc_sub_blks *sblk; > + u32 data = 0; > + u32 det_thresh_flatness; > + u32 num_active_slice_per_enc; > + u32 bpp; > + > + if (!hw_dsc || !dsc) > + return; > + > + hw = &hw_dsc->hw; > + > + sblk = hw_dsc->caps->sblk; > + > + if (mode & DSC_MODE_SPLIT_PANEL) > + data |= BIT(0); > + > + if (mode & DSC_MODE_MULTIPLEX) > + data |= BIT(1); > + > + num_active_slice_per_enc = dsc->slice_count; > + if (mode & DSC_MODE_MULTIPLEX) > + num_active_slice_per_enc = dsc->slice_count / 2; > + > + data |= (num_active_slice_per_enc & 0x3) << 7; > + > + DPU_REG_WRITE(hw, DSC_CMN_MAIN_CNF, data); > + > + data = (initial_lines & 0xff); Are these parenthesis needed? > + > + if (mode & DSC_MODE_VIDEO) > + data |= BIT(9); > + > + data |= (_dsc_calc_output_buf_max_addr(hw_dsc, num_active_slice_per_enc) << 18); parenthesis? - Marijn > + > + DPU_REG_WRITE(hw, sblk->enc.base + ENC_DF_CTRL, data); > + > + data = (dsc->dsc_version_minor & 0xf) << 28; > + if (dsc->dsc_version_minor == 0x2) { > + if (dsc->native_422) > + data |= BIT(22); > + if (dsc->native_420) > + data |= BIT(21); > + } > + > + bpp = dsc->bits_per_pixel; > + /* as per hw requirement bpp should be programmed > + * twice the actual value in case of 420 or 422 encoding > + */ > + if (dsc->native_422 || dsc->native_420) > + bpp = 2 * bpp; > + > + data |= bpp << 10; > + > + if (dsc->block_pred_enable) > + data |= BIT(20); > + > + if (dsc->convert_rgb) > + data |= BIT(4); > + > + data |= (dsc->line_buf_depth & 0xf) << 6; > + data |= dsc->bits_per_component & 0xf; > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_MAIN_CONF, data); > + > + data = (dsc->pic_width & 0xffff) | > + ((dsc->pic_height & 0xffff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_PICTURE_SIZE, data); > + > + data = (dsc->slice_width & 0xffff) | > + ((dsc->slice_height & 0xffff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_SLICE_SIZE, data); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_MISC_SIZE, > + (dsc->slice_chunk_size) & 0xffff); > + > + data = (dsc->initial_xmit_delay & 0xffff) | > + ((dsc->initial_dec_delay & 0xffff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_HRD_DELAYS, data); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_SCALE, > + dsc->initial_scale_value & 0x3f); > + > + data = (dsc->scale_increment_interval & 0xffff) | > + ((dsc->scale_decrement_interval & 0x7ff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_SCALE_INC_DEC, data); > + > + data = (dsc->first_line_bpg_offset & 0x1f) | > + ((dsc->second_line_bpg_offset & 0x1f) << 5); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_1, data); > + > + data = (dsc->nfl_bpg_offset & 0xffff) | > + ((dsc->slice_bpg_offset & 0xffff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_2, data); > + > + data = (dsc->initial_offset & 0xffff) | > + ((dsc->final_offset & 0xffff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_3, data); > + > + data = (dsc->nsl_bpg_offset & 0xffff) | > + ((dsc->second_line_offset_adj & 0xffff) << 16); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_4, data); > + > + det_thresh_flatness = drm_dsc_flatness_det_thresh(dsc); > + data = (dsc->flatness_min_qp & 0x1f) | > + ((dsc->flatness_max_qp & 0x1f) << 5) | > + ((det_thresh_flatness & 0xff) << 10); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_FLATNESS_QP, data); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MODEL_SIZE, > + (dsc->rc_model_size) & 0xffff); > + > + data = dsc->rc_edge_factor & 0xf; > + data |= (dsc->rc_quant_incr_limit0 & 0x1f) << 8; > + data |= (dsc->rc_quant_incr_limit1 & 0x1f) << 13; > + data |= (dsc->rc_tgt_offset_high & 0xf) << 20; > + data |= (dsc->rc_tgt_offset_low & 0xf) << 24; > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_CONFIG, data); > + > + /* program the dsc wrapper */ > + data = BIT(0); /* encoder enable */ > + if (dsc->native_422) > + data |= BIT(8); > + else if (dsc->native_420) > + data |= BIT(9); > + if (!dsc->convert_rgb) > + data |= BIT(10); > + if (dsc->bits_per_component == 8) > + data |= BIT(11); > + if (mode & DSC_MODE_SPLIT_PANEL) > + data |= BIT(12); > + if (mode & DSC_MODE_MULTIPLEX) > + data |= BIT(13); > + if (!(mode & DSC_MODE_VIDEO)) > + data |= BIT(17); > + > + DPU_REG_WRITE(hw, sblk->ctl.base + DSC_CFG, data); > +} > + > +static void dpu_hw_dsc_config_thresh_1_2(struct dpu_hw_dsc *hw_dsc, > + struct drm_dsc_config *dsc) > +{ > + struct dpu_hw_blk_reg_map *hw; > + const struct dpu_dsc_sub_blks *sblk; > + struct drm_dsc_rc_range_parameters *rc; > + > + if (!hw_dsc || !dsc) > + return; > + > + hw = &hw_dsc->hw; > + > + sblk = hw_dsc->caps->sblk; > + > + rc = dsc->rc_range_params; > + > + /* > + * With BUF_THRESH -- 14 in total > + * each register contains 4 thresh values with the last register > + * containing only 2 thresh values > + */ > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_0, > + (dsc->rc_buf_thresh[0] << 0) | > + (dsc->rc_buf_thresh[1] << 8) | > + (dsc->rc_buf_thresh[2] << 16) | > + (dsc->rc_buf_thresh[3] << 24)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_1, > + (dsc->rc_buf_thresh[4] << 0) | > + (dsc->rc_buf_thresh[5] << 8) | > + (dsc->rc_buf_thresh[6] << 16) | > + (dsc->rc_buf_thresh[7] << 24)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_2, > + (dsc->rc_buf_thresh[8] << 0) | > + (dsc->rc_buf_thresh[9] << 8) | > + (dsc->rc_buf_thresh[10] << 16) | > + (dsc->rc_buf_thresh[11] << 24)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_3, > + (dsc->rc_buf_thresh[12] << 0) | > + (dsc->rc_buf_thresh[13] << 8)); > + > + /* > + * with min/max_QP -- 5 bits > + * each register contains 5 min_qp or max_qp for total of 15 > + * > + * With BPG_OFFSET -- 6 bits > + * each register contains 5 BPG_offset for total of 15 > + */ > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MIN_QP_0, > + (rc[0].range_min_qp << 0) | > + (rc[1].range_min_qp << 5) | > + (rc[2].range_min_qp << 10) | > + (rc[3].range_min_qp << 15) | > + (rc[4].range_min_qp << 20)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MAX_QP_0, > + (rc[0].range_max_qp << 0) | > + (rc[1].range_max_qp << 5) | > + (rc[2].range_max_qp << 10) | > + (rc[3].range_max_qp << 15) | > + (rc[4].range_max_qp << 20)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_RANGE_BPG_OFFSETS_0, > + (rc[0].range_bpg_offset << 0) | > + (rc[1].range_bpg_offset << 6) | > + (rc[2].range_bpg_offset << 12) | > + (rc[3].range_bpg_offset << 18) | > + (rc[4].range_bpg_offset << 24)); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MIN_QP_1, > + (rc[5].range_min_qp << 0) | > + (rc[6].range_min_qp << 5) | > + (rc[7].range_min_qp << 10) | > + (rc[8].range_min_qp << 15) | > + (rc[9].range_min_qp << 20)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MAX_QP_1, > + (rc[5].range_max_qp << 0) | > + (rc[6].range_max_qp << 5) | > + (rc[7].range_max_qp << 10) | > + (rc[8].range_max_qp << 15) | > + (rc[9].range_max_qp << 20)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_RANGE_BPG_OFFSETS_1, > + (rc[5].range_bpg_offset << 0) | > + (rc[6].range_bpg_offset << 6) | > + (rc[7].range_bpg_offset << 12) | > + (rc[8].range_bpg_offset << 18) | > + (rc[9].range_bpg_offset << 24)); > + > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MIN_QP_2, > + (rc[10].range_min_qp << 0) | > + (rc[11].range_min_qp << 5) | > + (rc[12].range_min_qp << 10) | > + (rc[13].range_min_qp << 15) | > + (rc[14].range_min_qp << 20)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MAX_QP_2, > + (rc[10].range_max_qp << 0) | > + (rc[11].range_max_qp << 5) | > + (rc[12].range_max_qp << 10) | > + (rc[13].range_max_qp << 15) | > + (rc[14].range_max_qp << 20)); > + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_RANGE_BPG_OFFSETS_2, > + (rc[10].range_bpg_offset << 0) | > + (rc[11].range_bpg_offset << 6) | > + (rc[12].range_bpg_offset << 12) | > + (rc[13].range_bpg_offset << 18) | > + (rc[14].range_bpg_offset << 24)); > +} > + > +static void dpu_hw_dsc_bind_pingpong_blk_1_2(struct dpu_hw_dsc *hw_dsc, > + const enum dpu_pingpong pp) > +{ > + struct dpu_hw_blk_reg_map *hw; > + const struct dpu_dsc_sub_blks *sblk; > + int mux_cfg = 0xf; /* Disabled */ > + > + hw = &hw_dsc->hw; > + > + sblk = hw_dsc->caps->sblk; > + > + if (pp) > + mux_cfg = (pp - PINGPONG_0) & 0x7; > + > + DPU_REG_WRITE(hw, sblk->ctl.base + DSC_CTL, mux_cfg); > +} > + > +static void _setup_dcs_ops_1_2(struct dpu_hw_dsc_ops *ops, > + const unsigned long features) > +{ > + ops->dsc_disable = dpu_hw_dsc_disable_1_2; > + ops->dsc_config = dpu_hw_dsc_config_1_2; > + ops->dsc_config_thresh = dpu_hw_dsc_config_thresh_1_2; > + ops->dsc_bind_pingpong_blk = dpu_hw_dsc_bind_pingpong_blk_1_2; > +} > + > +struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(const struct dpu_dsc_cfg *cfg, > + void __iomem *addr) > +{ > + struct dpu_hw_dsc *c; > + > + c = kzalloc(sizeof(*c), GFP_KERNEL); > + if (!c) > + return ERR_PTR(-ENOMEM); > + > + c->hw.blk_addr = addr + cfg->base; > + c->hw.log_mask = DPU_DBG_MASK_DSC; > + > + c->idx = cfg->id; > + c->caps = cfg; > + _setup_dcs_ops_1_2(&c->ops, c->caps->features); > + > + return c; > +} > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > index f0fc704..502dd60 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c > @@ -1,6 +1,7 @@ > // SPDX-License-Identifier: GPL-2.0-only > /* > * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. > + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved. > */ > > #define pr_fmt(fmt) "[drm:%s] " fmt, __func__ > @@ -246,7 +247,11 @@ int dpu_rm_init(struct dpu_rm *rm, > struct dpu_hw_dsc *hw; > const struct dpu_dsc_cfg *dsc = &cat->dsc[i]; > > - hw = dpu_hw_dsc_init(dsc, mmio); > + if (test_bit(DPU_DSC_HW_REV_1_2, &dsc->features)) > + hw = dpu_hw_dsc_init_1_2(dsc, mmio); > + else > + hw = dpu_hw_dsc_init(dsc, mmio); > + > if (IS_ERR_OR_NULL(hw)) { > rc = PTR_ERR(hw); > DPU_ERROR("failed dsc object creation: err %d\n", rc); > -- > 2.7.4 >
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 7274c412..4c7195af2 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -65,6 +65,7 @@ msm-$(CONFIG_DRM_MSM_DPU) += \ disp/dpu1/dpu_hw_catalog.o \ disp/dpu1/dpu_hw_ctl.o \ disp/dpu1/dpu_hw_dsc.o \ + disp/dpu1/dpu_hw_dsc_1_2.o \ disp/dpu1/dpu_hw_interrupts.o \ disp/dpu1/dpu_hw_intf.o \ disp/dpu1/dpu_hw_lm.o \ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h index 83854e8..11610f7 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* - * Copyright (c) 2022. Qualcomm Innovation Center, Inc. All rights reserved. + * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved. * Copyright (c) 2015-2018, 2020 The Linux Foundation. All rights reserved. */ @@ -244,12 +244,18 @@ enum { }; /** - * DSC features + * DSC sub-blocks/features * @DPU_DSC_OUTPUT_CTRL Configure which PINGPONG block gets * the pixel output from this DSC. + * @DPU_DSC_HW_REV_1_2 DSC block supports DSC 1.1 and 1.2 + * @DPU_DSC_NATIVE_42x_EN Supports NATIVE_422_EN and NATIVE_420_EN encoding + * @DPU_DSC_MAX */ enum { DPU_DSC_OUTPUT_CTRL = 0x1, + DPU_DSC_HW_REV_1_2, + DPU_DSC_NATIVE_42x_EN, + DPU_DSC_MAX }; /** @@ -306,6 +312,14 @@ struct dpu_pp_blk { }; /** + * struct dpu_dsc_blk - DSC Encoder sub-blk information + * @info: HW register and features supported by this sub-blk + */ +struct dpu_dsc_blk { + DPU_HW_SUBBLK_INFO; +}; + +/** * enum dpu_qos_lut_usage - define QoS LUT use cases */ enum dpu_qos_lut_usage { @@ -452,6 +466,16 @@ struct dpu_pingpong_sub_blks { }; /** + * struct dpu_dsc_sub_blks - DSC sub-blks + * @enc: DSC encoder sub-block + * @ctl: DSC controller sub-block + */ +struct dpu_dsc_sub_blks { + struct dpu_dsc_blk enc; + struct dpu_dsc_blk ctl; +}; + +/** * dpu_clk_ctrl_type - Defines top level clock control signals */ enum dpu_clk_ctrl_type { @@ -605,10 +629,13 @@ struct dpu_merge_3d_cfg { * struct dpu_dsc_cfg - information of DSC blocks * @id enum identifying this block * @base register offset of this block + * @len: length of hardware block * @features bit mask identifying sub-blocks/features + * @sblk: sub-blocks information */ struct dpu_dsc_cfg { DPU_HW_BLK_INFO; + const struct dpu_dsc_sub_blks *sblk; }; /** diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h index 138080a..d5b597a 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h @@ -1,5 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0-only */ -/* Copyright (c) 2020-2022, Linaro Limited */ +/* + * Copyright (c) 2020-2022, Linaro Limited + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved + */ #ifndef _DPU_HW_DSC_H #define _DPU_HW_DSC_H @@ -69,6 +72,15 @@ struct dpu_hw_dsc *dpu_hw_dsc_init(const struct dpu_dsc_cfg *cfg, void __iomem *addr); /** + * dpu_hw_dsc_init_1_2() - initializes the v1.2 DSC hw driver object + * @cfg: DSC catalog entry for which driver object is required + * @addr: Mapped register io address of MDP + * Returns: Error code or allocated dpu_hw_dsc context + */ +struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(const struct dpu_dsc_cfg *cfg, + void __iomem *addr); + +/** * dpu_hw_dsc_destroy - destroys dsc driver context * @dsc: Pointer to dsc driver context returned by dpu_hw_dsc_init */ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c new file mode 100644 index 00000000..24fe1d9 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c @@ -0,0 +1,387 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved + */ + +#include <drm/display/drm_dsc_helper.h> + +#include "dpu_kms.h" +#include "dpu_hw_catalog.h" +#include "dpu_hwio.h" +#include "dpu_hw_mdss.h" +#include "dpu_hw_dsc.h" + +#define DSC_CMN_MAIN_CNF 0x00 + +/* DPU_DSC_ENC register offsets */ +#define ENC_DF_CTRL 0x00 +#define ENC_GENERAL_STATUS 0x04 +#define ENC_HSLICE_STATUS 0x08 +#define ENC_OUT_STATUS 0x0C +#define ENC_INT_STAT 0x10 +#define ENC_INT_CLR 0x14 +#define ENC_INT_MASK 0x18 +#define DSC_MAIN_CONF 0x30 +#define DSC_PICTURE_SIZE 0x34 +#define DSC_SLICE_SIZE 0x38 +#define DSC_MISC_SIZE 0x3C +#define DSC_HRD_DELAYS 0x40 +#define DSC_RC_SCALE 0x44 +#define DSC_RC_SCALE_INC_DEC 0x48 +#define DSC_RC_OFFSETS_1 0x4C +#define DSC_RC_OFFSETS_2 0x50 +#define DSC_RC_OFFSETS_3 0x54 +#define DSC_RC_OFFSETS_4 0x58 +#define DSC_FLATNESS_QP 0x5C +#define DSC_RC_MODEL_SIZE 0x60 +#define DSC_RC_CONFIG 0x64 +#define DSC_RC_BUF_THRESH_0 0x68 +#define DSC_RC_BUF_THRESH_1 0x6C +#define DSC_RC_BUF_THRESH_2 0x70 +#define DSC_RC_BUF_THRESH_3 0x74 +#define DSC_RC_MIN_QP_0 0x78 +#define DSC_RC_MIN_QP_1 0x7C +#define DSC_RC_MIN_QP_2 0x80 +#define DSC_RC_MAX_QP_0 0x84 +#define DSC_RC_MAX_QP_1 0x88 +#define DSC_RC_MAX_QP_2 0x8C +#define DSC_RC_RANGE_BPG_OFFSETS_0 0x90 +#define DSC_RC_RANGE_BPG_OFFSETS_1 0x94 +#define DSC_RC_RANGE_BPG_OFFSETS_2 0x98 + +/* DPU_DSC_CTL register offsets */ +#define DSC_CTL 0x00 +#define DSC_CFG 0x04 +#define DSC_DATA_IN_SWAP 0x08 +#define DSC_CLK_CTRL 0x0C + +static int _dsc_calc_output_buf_max_addr(struct dpu_hw_dsc *hw_dsc, int num_softslice) +{ + int max_addr = 2400 / num_softslice; + + if (hw_dsc->caps->features & BIT(DPU_DSC_NATIVE_42x_EN)) + max_addr /= 2; + + return max_addr - 1; +}; + +static void dpu_hw_dsc_disable_1_2(struct dpu_hw_dsc *hw_dsc) +{ + struct dpu_hw_blk_reg_map *hw; + const struct dpu_dsc_sub_blks *sblk; + + if (!hw_dsc) + return; + + hw = &hw_dsc->hw; + sblk = hw_dsc->caps->sblk; + DPU_REG_WRITE(hw, sblk->ctl.base + DSC_CFG, 0); + + DPU_REG_WRITE(hw, sblk->enc.base + ENC_DF_CTRL, 0); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_MAIN_CONF, 0); +} + +static void dpu_hw_dsc_config_1_2(struct dpu_hw_dsc *hw_dsc, + struct drm_dsc_config *dsc, + u32 mode, + u32 initial_lines) +{ + struct dpu_hw_blk_reg_map *hw; + const struct dpu_dsc_sub_blks *sblk; + u32 data = 0; + u32 det_thresh_flatness; + u32 num_active_slice_per_enc; + u32 bpp; + + if (!hw_dsc || !dsc) + return; + + hw = &hw_dsc->hw; + + sblk = hw_dsc->caps->sblk; + + if (mode & DSC_MODE_SPLIT_PANEL) + data |= BIT(0); + + if (mode & DSC_MODE_MULTIPLEX) + data |= BIT(1); + + num_active_slice_per_enc = dsc->slice_count; + if (mode & DSC_MODE_MULTIPLEX) + num_active_slice_per_enc = dsc->slice_count / 2; + + data |= (num_active_slice_per_enc & 0x3) << 7; + + DPU_REG_WRITE(hw, DSC_CMN_MAIN_CNF, data); + + data = (initial_lines & 0xff); + + if (mode & DSC_MODE_VIDEO) + data |= BIT(9); + + data |= (_dsc_calc_output_buf_max_addr(hw_dsc, num_active_slice_per_enc) << 18); + + DPU_REG_WRITE(hw, sblk->enc.base + ENC_DF_CTRL, data); + + data = (dsc->dsc_version_minor & 0xf) << 28; + if (dsc->dsc_version_minor == 0x2) { + if (dsc->native_422) + data |= BIT(22); + if (dsc->native_420) + data |= BIT(21); + } + + bpp = dsc->bits_per_pixel; + /* as per hw requirement bpp should be programmed + * twice the actual value in case of 420 or 422 encoding + */ + if (dsc->native_422 || dsc->native_420) + bpp = 2 * bpp; + + data |= bpp << 10; + + if (dsc->block_pred_enable) + data |= BIT(20); + + if (dsc->convert_rgb) + data |= BIT(4); + + data |= (dsc->line_buf_depth & 0xf) << 6; + data |= dsc->bits_per_component & 0xf; + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_MAIN_CONF, data); + + data = (dsc->pic_width & 0xffff) | + ((dsc->pic_height & 0xffff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_PICTURE_SIZE, data); + + data = (dsc->slice_width & 0xffff) | + ((dsc->slice_height & 0xffff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_SLICE_SIZE, data); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_MISC_SIZE, + (dsc->slice_chunk_size) & 0xffff); + + data = (dsc->initial_xmit_delay & 0xffff) | + ((dsc->initial_dec_delay & 0xffff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_HRD_DELAYS, data); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_SCALE, + dsc->initial_scale_value & 0x3f); + + data = (dsc->scale_increment_interval & 0xffff) | + ((dsc->scale_decrement_interval & 0x7ff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_SCALE_INC_DEC, data); + + data = (dsc->first_line_bpg_offset & 0x1f) | + ((dsc->second_line_bpg_offset & 0x1f) << 5); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_1, data); + + data = (dsc->nfl_bpg_offset & 0xffff) | + ((dsc->slice_bpg_offset & 0xffff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_2, data); + + data = (dsc->initial_offset & 0xffff) | + ((dsc->final_offset & 0xffff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_3, data); + + data = (dsc->nsl_bpg_offset & 0xffff) | + ((dsc->second_line_offset_adj & 0xffff) << 16); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_OFFSETS_4, data); + + det_thresh_flatness = drm_dsc_flatness_det_thresh(dsc); + data = (dsc->flatness_min_qp & 0x1f) | + ((dsc->flatness_max_qp & 0x1f) << 5) | + ((det_thresh_flatness & 0xff) << 10); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_FLATNESS_QP, data); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MODEL_SIZE, + (dsc->rc_model_size) & 0xffff); + + data = dsc->rc_edge_factor & 0xf; + data |= (dsc->rc_quant_incr_limit0 & 0x1f) << 8; + data |= (dsc->rc_quant_incr_limit1 & 0x1f) << 13; + data |= (dsc->rc_tgt_offset_high & 0xf) << 20; + data |= (dsc->rc_tgt_offset_low & 0xf) << 24; + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_CONFIG, data); + + /* program the dsc wrapper */ + data = BIT(0); /* encoder enable */ + if (dsc->native_422) + data |= BIT(8); + else if (dsc->native_420) + data |= BIT(9); + if (!dsc->convert_rgb) + data |= BIT(10); + if (dsc->bits_per_component == 8) + data |= BIT(11); + if (mode & DSC_MODE_SPLIT_PANEL) + data |= BIT(12); + if (mode & DSC_MODE_MULTIPLEX) + data |= BIT(13); + if (!(mode & DSC_MODE_VIDEO)) + data |= BIT(17); + + DPU_REG_WRITE(hw, sblk->ctl.base + DSC_CFG, data); +} + +static void dpu_hw_dsc_config_thresh_1_2(struct dpu_hw_dsc *hw_dsc, + struct drm_dsc_config *dsc) +{ + struct dpu_hw_blk_reg_map *hw; + const struct dpu_dsc_sub_blks *sblk; + struct drm_dsc_rc_range_parameters *rc; + + if (!hw_dsc || !dsc) + return; + + hw = &hw_dsc->hw; + + sblk = hw_dsc->caps->sblk; + + rc = dsc->rc_range_params; + + /* + * With BUF_THRESH -- 14 in total + * each register contains 4 thresh values with the last register + * containing only 2 thresh values + */ + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_0, + (dsc->rc_buf_thresh[0] << 0) | + (dsc->rc_buf_thresh[1] << 8) | + (dsc->rc_buf_thresh[2] << 16) | + (dsc->rc_buf_thresh[3] << 24)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_1, + (dsc->rc_buf_thresh[4] << 0) | + (dsc->rc_buf_thresh[5] << 8) | + (dsc->rc_buf_thresh[6] << 16) | + (dsc->rc_buf_thresh[7] << 24)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_2, + (dsc->rc_buf_thresh[8] << 0) | + (dsc->rc_buf_thresh[9] << 8) | + (dsc->rc_buf_thresh[10] << 16) | + (dsc->rc_buf_thresh[11] << 24)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_BUF_THRESH_3, + (dsc->rc_buf_thresh[12] << 0) | + (dsc->rc_buf_thresh[13] << 8)); + + /* + * with min/max_QP -- 5 bits + * each register contains 5 min_qp or max_qp for total of 15 + * + * With BPG_OFFSET -- 6 bits + * each register contains 5 BPG_offset for total of 15 + */ + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MIN_QP_0, + (rc[0].range_min_qp << 0) | + (rc[1].range_min_qp << 5) | + (rc[2].range_min_qp << 10) | + (rc[3].range_min_qp << 15) | + (rc[4].range_min_qp << 20)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MAX_QP_0, + (rc[0].range_max_qp << 0) | + (rc[1].range_max_qp << 5) | + (rc[2].range_max_qp << 10) | + (rc[3].range_max_qp << 15) | + (rc[4].range_max_qp << 20)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_RANGE_BPG_OFFSETS_0, + (rc[0].range_bpg_offset << 0) | + (rc[1].range_bpg_offset << 6) | + (rc[2].range_bpg_offset << 12) | + (rc[3].range_bpg_offset << 18) | + (rc[4].range_bpg_offset << 24)); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MIN_QP_1, + (rc[5].range_min_qp << 0) | + (rc[6].range_min_qp << 5) | + (rc[7].range_min_qp << 10) | + (rc[8].range_min_qp << 15) | + (rc[9].range_min_qp << 20)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MAX_QP_1, + (rc[5].range_max_qp << 0) | + (rc[6].range_max_qp << 5) | + (rc[7].range_max_qp << 10) | + (rc[8].range_max_qp << 15) | + (rc[9].range_max_qp << 20)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_RANGE_BPG_OFFSETS_1, + (rc[5].range_bpg_offset << 0) | + (rc[6].range_bpg_offset << 6) | + (rc[7].range_bpg_offset << 12) | + (rc[8].range_bpg_offset << 18) | + (rc[9].range_bpg_offset << 24)); + + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MIN_QP_2, + (rc[10].range_min_qp << 0) | + (rc[11].range_min_qp << 5) | + (rc[12].range_min_qp << 10) | + (rc[13].range_min_qp << 15) | + (rc[14].range_min_qp << 20)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_MAX_QP_2, + (rc[10].range_max_qp << 0) | + (rc[11].range_max_qp << 5) | + (rc[12].range_max_qp << 10) | + (rc[13].range_max_qp << 15) | + (rc[14].range_max_qp << 20)); + DPU_REG_WRITE(hw, sblk->enc.base + DSC_RC_RANGE_BPG_OFFSETS_2, + (rc[10].range_bpg_offset << 0) | + (rc[11].range_bpg_offset << 6) | + (rc[12].range_bpg_offset << 12) | + (rc[13].range_bpg_offset << 18) | + (rc[14].range_bpg_offset << 24)); +} + +static void dpu_hw_dsc_bind_pingpong_blk_1_2(struct dpu_hw_dsc *hw_dsc, + const enum dpu_pingpong pp) +{ + struct dpu_hw_blk_reg_map *hw; + const struct dpu_dsc_sub_blks *sblk; + int mux_cfg = 0xf; /* Disabled */ + + hw = &hw_dsc->hw; + + sblk = hw_dsc->caps->sblk; + + if (pp) + mux_cfg = (pp - PINGPONG_0) & 0x7; + + DPU_REG_WRITE(hw, sblk->ctl.base + DSC_CTL, mux_cfg); +} + +static void _setup_dcs_ops_1_2(struct dpu_hw_dsc_ops *ops, + const unsigned long features) +{ + ops->dsc_disable = dpu_hw_dsc_disable_1_2; + ops->dsc_config = dpu_hw_dsc_config_1_2; + ops->dsc_config_thresh = dpu_hw_dsc_config_thresh_1_2; + ops->dsc_bind_pingpong_blk = dpu_hw_dsc_bind_pingpong_blk_1_2; +} + +struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(const struct dpu_dsc_cfg *cfg, + void __iomem *addr) +{ + struct dpu_hw_dsc *c; + + c = kzalloc(sizeof(*c), GFP_KERNEL); + if (!c) + return ERR_PTR(-ENOMEM); + + c->hw.blk_addr = addr + cfg->base; + c->hw.log_mask = DPU_DBG_MASK_DSC; + + c->idx = cfg->id; + c->caps = cfg; + _setup_dcs_ops_1_2(&c->ops, c->caps->features); + + return c; +} diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c index f0fc704..502dd60 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved. */ #define pr_fmt(fmt) "[drm:%s] " fmt, __func__ @@ -246,7 +247,11 @@ int dpu_rm_init(struct dpu_rm *rm, struct dpu_hw_dsc *hw; const struct dpu_dsc_cfg *dsc = &cat->dsc[i]; - hw = dpu_hw_dsc_init(dsc, mmio); + if (test_bit(DPU_DSC_HW_REV_1_2, &dsc->features)) + hw = dpu_hw_dsc_init_1_2(dsc, mmio); + else + hw = dpu_hw_dsc_init(dsc, mmio); + if (IS_ERR_OR_NULL(hw)) { rc = PTR_ERR(hw); DPU_ERROR("failed dsc object creation: err %d\n", rc);