| Message ID | 20230405-add-dsc-support-v1-4-6bc6f03ae735@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add DSC v1.2 Support for DSI | expand |
Hi Jessica, On 2023-05-03 12:04:59, Jessica Zhang wrote: > > > On 5/3/2023 12:28 AM, Marijn Suijten wrote: > > On 2023-05-02 18:19:15, Jessica Zhang wrote: > >> Add a dpu_hw_intf op to enable data compression. > >> > >> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> > >> --- > >> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 4 ++++ > >> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 7 +++++++ > >> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h | 2 ++ > >> 3 files changed, 13 insertions(+) > >> > >> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > >> index 74470d068622..4321a1aba17f 100644 > >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > > > > Can we have INTF DCE on video-mode encoders as well? > > Hi Marijn, > > Currently, there's no way to validate DSC for video mode as I've only > made changes to support DSI for command mode. We are planning to post > changes to support DSC over DP, which will include changes for video mode. Okay, but then mention so in the patch description (which is rather short in this revision). <snip> > >> #define INTF_CFG2_DATABUS_WIDEN BIT(0) > >> #define INTF_CFG2_DATA_HCTL_EN BIT(4) > > > > These should probably be reindented to match the below... And the rest > > of the defines use spaces instead of tabs. > > Fair point, though I think fixing the whitespace for these 2 macros > specifically might be better in a more relevant series. Yes, I have many patches to start cleaning these up, as well as all the broken kerneldoc comments, but it's an uphill battle. Not sure if I'll get to it any time soon if at all. > With that being said, I'll change the spacing of the DATA_COMPRESS bit > to spaces instead of tabs. Thanks, that seems to be the most common format. > >> +#define INTF_CFG2_DCE_DATA_COMPRESS BIT(12) > >> > >> #define INTF_MISR_CTRL 0x180 > >> #define INTF_MISR_SIGNATURE 0x184 > > > > This does not seem to apply on top of: > > https://lore.kernel.org/linux-arm-msm/20230411-dpu-intf-te-v4-10-27ce1a5ab5c6@somainline.org/ > > Seems like I'm missing some patches from that series on my working > branch. Will rebase on top of the full series for the v2. Thanks, but do discuss with Abhinav/Dmitry which series will land first. > >> +static inline void dpu_hw_intf_enable_compression(struct dpu_hw_intf *ctx) > > > > Why inline? This is used as a pointer callback. > > Acked, will remove the inline. > > > > >> +{ > >> + DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, INTF_CFG2_DCE_DATA_COMPRESS); > > > > dpu_hw_intf_setup_timing_engine() also programs INTF_CONFIG2. Is it > > double-buffered, or is that config **always** unused when DSI CMD mode > > is used in conjunction with DSC/DCE? Otherwise this should perhaps OR > > the bitflag into the register, or write the whole thing at once in > > dpu_hw_intf_setup_timing_engine()? > > For command mode, INTF_CONFIG2 is unused aside from setting > DATA_COMPRESS for DSC. > > Since setup_timing_engine() is only used for video mode, the > corresponding changes will be made in the DSC v1.2 for DP changes. Ack, that makes sense. However, is this a guarantee that nothing else will write INTF_CONFIG2 in the future, or will we solve that problem when it happens? I'm afraid more config-bits get added to this register in the future and might possibly race/overwrite each other. - Marijn <snip>
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c index 74470d068622..4321a1aba17f 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c @@ -72,6 +72,10 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg( phys_enc->hw_intf, true, phys_enc->hw_pp->idx); + + if (phys_enc->dpu_kms->catalog->caps->has_data_compress && + phys_enc->hw_intf->ops.enable_compression) + phys_enc->hw_intf->ops.enable_compression(phys_enc->hw_intf); } static void dpu_encoder_phys_cmd_pp_tx_done_irq(void *arg, int irq_idx) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c index 671048a78801..4ce7ffdd7a05 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c @@ -64,10 +64,16 @@ #define INTF_CFG2_DATABUS_WIDEN BIT(0) #define INTF_CFG2_DATA_HCTL_EN BIT(4) +#define INTF_CFG2_DCE_DATA_COMPRESS BIT(12) #define INTF_MISR_CTRL 0x180 #define INTF_MISR_SIGNATURE 0x184 +static inline void dpu_hw_intf_enable_compression(struct dpu_hw_intf *ctx) +{ + DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, INTF_CFG2_DCE_DATA_COMPRESS); +} + static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, const struct intf_timing_params *p, const struct dpu_format *fmt) @@ -325,6 +331,7 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops, ops->bind_pingpong_blk = dpu_hw_intf_bind_pingpong_blk; ops->setup_misr = dpu_hw_intf_setup_misr; ops->collect_misr = dpu_hw_intf_collect_misr; + ops->enable_compression = dpu_hw_intf_enable_compression; } struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg, diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h index 102c4f0e812b..99528c735368 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h @@ -60,6 +60,7 @@ struct intf_status { * feed pixels to this interface * @setup_misr: enable/disable MISR * @collect_misr: read MISR signature + * @enable_compression: Enable data compression */ struct dpu_hw_intf_ops { void (*setup_timing_gen)(struct dpu_hw_intf *intf, @@ -82,6 +83,7 @@ struct dpu_hw_intf_ops { const enum dpu_pingpong pp); void (*setup_misr)(struct dpu_hw_intf *intf, bool enable, u32 frame_count); int (*collect_misr)(struct dpu_hw_intf *intf, u32 *misr_value); + void (*enable_compression)(struct dpu_hw_intf *intf); }; struct dpu_hw_intf {
Add a dpu_hw_intf op to enable data compression. Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 4 ++++ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 7 +++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h | 2 ++ 3 files changed, 13 insertions(+)