DSC needs some configuration from device tree, add support to read and store these params and add DSC structures in msm_drv
Signed-off-by: Vinod Koul vkoul@kernel.org --- drivers/gpu/drm/msm/dsi/dsi_host.c | 170 +++++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_drv.h | 32 ++++++ 2 files changed, 202 insertions(+)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 8a10e4343281..864d3c655e73 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -156,6 +156,7 @@ struct msm_dsi_host { struct regmap *sfpb;
struct drm_display_mode *mode; + struct msm_display_dsc_config *dsc;
/* connected device info */ struct device_node *device_node; @@ -1744,6 +1745,168 @@ static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host, return -EINVAL; }
+static u32 dsi_dsc_rc_buf_thresh[DSC_NUM_BUF_RANGES - 1] = { + 0x0e, 0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62, + 0x69, 0x70, 0x77, 0x79, 0x7b, 0x7d, 0x7e +}; + +/* only 8bpc, 8bpp added */ +static char min_qp[DSC_NUM_BUF_RANGES] = { + 0, 0, 1, 1, 3, 3, 3, 3, 3, 3, 5, 5, 5, 7, 13 +}; + +static char max_qp[DSC_NUM_BUF_RANGES] = { + 4, 4, 5, 6, 7, 7, 7, 8, 9, 10, 11, 12, 13, 13, 15 +}; + +static char bpg_offset[DSC_NUM_BUF_RANGES] = { + 2, 0, 0, -2, -4, -6, -8, -8, -8, -10, -10, -12, -12, -12, -12 +}; + +static int dsi_populate_dsc_params(struct msm_display_dsc_config *dsc) +{ + int i; + + dsc->drm.rc_model_size = 8192; + dsc->drm.first_line_bpg_offset = 15; + dsc->drm.rc_edge_factor = 6; + dsc->drm.rc_tgt_offset_high = 3; + dsc->drm.rc_tgt_offset_low = 3; + dsc->drm.simple_422 = 0; + dsc->drm.convert_rgb = 1; + dsc->drm.vbr_enable = 0; + + /* handle only bpp = bpc = 8 */ + for (i = 0; i < DSC_NUM_BUF_RANGES - 1 ; i++) + dsc->drm.rc_buf_thresh[i] = dsi_dsc_rc_buf_thresh[i]; + + for (i = 0; i < DSC_NUM_BUF_RANGES; i++) { + dsc->drm.rc_range_params[i].range_min_qp = min_qp[i]; + dsc->drm.rc_range_params[i].range_max_qp = max_qp[i]; + dsc->drm.rc_range_params[i].range_bpg_offset = bpg_offset[i]; + } + + dsc->drm.initial_offset = 6144; + dsc->drm.initial_xmit_delay = 512; + dsc->drm.initial_scale_value = 32; + dsc->drm.first_line_bpg_offset = 12; + dsc->drm.line_buf_depth = dsc->drm.bits_per_component + 1; + + /* bpc 8 */ + dsc->drm.flatness_min_qp = 3; + dsc->drm.flatness_max_qp = 12; + dsc->det_thresh_flatness = 7; + dsc->drm.rc_quant_incr_limit0 = 11; + dsc->drm.rc_quant_incr_limit1 = 11; + dsc->drm.mux_word_size = DSC_MUX_WORD_SIZE_8_10_BPC; + + /* FIXME: need to call drm_dsc_compute_rc_parameters() so that rest of + * params are calculated + */ + + i = dsc->drm.slice_width % 3; + switch (i) { + case 0: + dsc->slice_last_group_size = 2; + break; + + case 1: + dsc->slice_last_group_size = 0; + break; + + case 2: + dsc->slice_last_group_size = 0; + break; + + default: + break; + } + + return 0; +} + +static int dsi_host_parse_dsc(struct msm_dsi_host *msm_host, + struct device_node *np) +{ + struct device *dev = &msm_host->pdev->dev; + struct msm_display_dsc_config *dsc; + bool is_dsc_enabled; + u32 data; + int ret; + + is_dsc_enabled = of_property_read_bool(np, "qcom,mdss-dsc-enabled"); + + if (!is_dsc_enabled) + return 0; + + dsc = kzalloc(sizeof(*dsc), GFP_KERNEL); + if (!dsc) + return -ENOMEM; + + ret = of_property_read_u32(np, "qcom,mdss-dsc-version", &data); + if (ret) { + dsc->drm.dsc_version_major = 0x1; + dsc->drm.dsc_version_minor = 0x1; + } else { + dsc->drm.dsc_version_major = (data >> 4) & 0xf; + dsc->drm.dsc_version_minor = data & 0xf; + } + + ret = of_property_read_u32(np, "qcom,mdss-scr-version", &data); + if (ret) + dsc->scr_rev = 0; + else + dsc->scr_rev = data & 0xff; + + ret = of_property_read_u32(np, "qcom,mdss-slice-height", &data); + if (ret) { + DRM_DEV_ERROR(dev, "failed to read dsc slice height\n"); + goto err; + } + dsc->drm.slice_height = data; + + ret = of_property_read_u32(np, "qcom,mdss-slice-width", &data); + if (ret) { + DRM_DEV_ERROR(dev, "failed to read dsc slice width\n"); + goto err; + } + dsc->drm.slice_width = data; + + ret = of_property_read_u32(np, "qcom,mdss-slice-per-pkt", &data); + if (ret) { + DRM_DEV_ERROR(dev, "failed to read mdss-slice-per-pkt\n"); + goto err; + } + dsc->slice_per_pkt = data; + + ret = of_property_read_u32(np, "qcom,mdss-bit-per-component", &data); + if (ret) { + DRM_DEV_ERROR(dev, "failed to read mdss-bit-per-component\n"); + goto err; + } + dsc->drm.bits_per_component = data; + + ret = of_property_read_u32(np, "qcom,mdss-bit-per-pixel", &data); + if (ret) { + DRM_DEV_ERROR(dev, "failed to read bit-per-pixel\n"); + goto err; + } + dsc->drm.bits_per_pixel = data; + + dsc->drm.block_pred_enable = of_property_read_bool(np, + "qcom,mdss-block-prediction-enable"); + + dsi_populate_dsc_params(dsc); + + msm_host->dsc = dsc; + + return 0; + +err: + kfree(dsc); + return ret; +} + static int dsi_host_parse_dt(struct msm_dsi_host *msm_host) { struct device *dev = &msm_host->pdev->dev; @@ -1763,6 +1926,13 @@ static int dsi_host_parse_dt(struct msm_dsi_host *msm_host) return 0; }
+ ret = dsi_host_parse_dsc(msm_host, np); + if (ret) { + DRM_DEV_ERROR(dev, "%s: invalid dsc configuration %d\n", __func__, ret); + ret = -EINVAL; + goto err; + } + ret = dsi_host_parse_lane_data(msm_host, endpoint); if (ret) { DRM_DEV_ERROR(dev, "%s: invalid lane configuration %d\n", diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 2668941df529..26661dd43936 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -30,6 +30,7 @@ #include <drm/drm_plane_helper.h> #include <drm/drm_probe_helper.h> #include <drm/drm_fb_helper.h> +#include <drm/drm_dsc.h> #include <drm/msm_drm.h> #include <drm/drm_gem.h>
@@ -70,6 +71,16 @@ enum msm_mdp_plane_property { #define MSM_GPU_MAX_RINGS 4 #define MAX_H_TILES_PER_DISPLAY 2
+/** + * enum msm_display_compression_type - compression method used for pixel stream + * @MSM_DISPLAY_COMPRESSION_NONE: Pixel data is not compressed + * @MSM_DISPLAY_COMPRESSION_DSC: DSC compresison is used + */ +enum msm_display_compression_type { + MSM_DISPLAY_COMPRESSION_NONE, + MSM_DISPLAY_COMPRESSION_DSC, +}; + /** * enum msm_display_caps - features/capabilities supported by displays * @MSM_DISPLAY_CAP_VID_MODE: Video or "active" mode supported @@ -134,6 +145,24 @@ struct msm_drm_thread { struct kthread_worker *worker; };
+/* DSC config */ +struct msm_display_dsc_config { + struct drm_dsc_config drm; + u8 scr_rev; + + u32 initial_lines; + u32 pkt_per_line; + u32 bytes_in_slice; + u32 bytes_per_pkt; + u32 eol_byte_num; + u32 pclk_per_line; + u32 slice_last_group_size; + u32 slice_per_pkt; + u32 det_thresh_flatness; + u32 extra_width; + u32 pps_delay_ms; +}; + struct msm_drm_private {
struct drm_device *dev; @@ -227,6 +256,9 @@ struct msm_drm_private { /* Properties */ struct drm_property *plane_property[PLANE_PROP_MAX_NUM];
+ /* DSC configuration */ + struct msm_display_dsc_config *dsc; + /* VRAM carveout, used when no IOMMU: */ struct { unsigned long size;