Re: [PATCH v2 7/7] drm/vc4: kms: Don't disable the muxing of an active CRTC
Hi!
On Mon, Nov 02, 2020 at 05:47:04PM +0900, Hoegeun Kwon wrote:
> Hi Maxime,
>
> Thanks for V2 patch.
>
>
> On 10/28/20 9:41 PM, Maxime Ripard wrote:
> > The current HVS muxing code will consider the CRTCs in a given state to
> > setup their muxing in the HVS, and disable the other CRTCs muxes.
> >
> > However, it's valid to only update a single CRTC with a state, and in this
> > situation we would mux out a CRTC that was enabled but left untouched by
> > the new state.
> >
> > Fix this by setting a flag on the CRTC state when the muxing has been
> > changed, and only change the muxing configuration when that flag is there.
> >
> > Fixes: 87ebcd42fb7b ("drm/vc4: crtc: Assign output to channel
> > automatically")
> > Signed-off-by: Maxime Ripard
> > ---
> > drivers/gpu/drm/vc4/vc4_drv.h | 1 +-
> > drivers/gpu/drm/vc4/vc4_kms.c | 84 +---
> > 2 files changed, 50 insertions(+), 35 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
> > index c6208b040f77..c074c0538e57 100644
> > --- a/drivers/gpu/drm/vc4/vc4_drv.h
> > +++ b/drivers/gpu/drm/vc4/vc4_drv.h
> > @@ -523,6 +523,7 @@ struct vc4_crtc_state {
> > struct drm_mm_node mm;
> > bool feed_txp;
> > bool txp_armed;
> > + bool needs_muxing;
> > unsigned int assigned_channel;
> >
> > struct {
> > diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
> > index 2aa726b7422c..409aeb19d210 100644
> > --- a/drivers/gpu/drm/vc4/vc4_kms.c
> > +++ b/drivers/gpu/drm/vc4/vc4_kms.c
> > @@ -224,10 +224,7 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev
> > *vc4,
> > {
> > struct drm_crtc_state *crtc_state;
> > struct drm_crtc *crtc;
> > - unsigned char dsp2_mux = 0;
> > - unsigned char dsp3_mux = 3;
> > - unsigned char dsp4_mux = 3;
> > - unsigned char dsp5_mux = 3;
> > + unsigned char mux;
> > unsigned int i;
> > u32 reg;
> >
> > @@ -235,50 +232,59 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev
> > *vc4,
> > struct vc4_crtc_state *vc4_state =
> > to_vc4_crtc_state(crtc_state);
> > struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
> >
> > - if (!crtc_state->active)
> > + if (!vc4_state->needs_muxing)
> > continue;
> >
> > switch (vc4_crtc->data->hvs_output) {
> > case 2:
> > - dsp2_mux = (vc4_state->assigned_channel == 2) ? 0 : 1;
> > + mux = (vc4_state->assigned_channel == 2) ? 0 : 1;
> > + reg = HVS_READ(SCALER_DISPECTRL);
> > + HVS_WRITE(SCALER_DISPECTRL,
> > + (reg & ~SCALER_DISPECTRL_DSP2_MUX_MASK) |
> > + VC4_SET_FIELD(mux,
> > SCALER_DISPECTRL_DSP2_MUX));
> > break;
> >
> > case 3:
> > - dsp3_mux = vc4_state->assigned_channel;
> > + if (vc4_state->assigned_channel ==
> > VC4_HVS_CHANNEL_DISABLED)
> > + mux = 3;
> > + else
> > + mux = vc4_state->assigned_channel;
> > +
> > + reg = HVS_READ(SCALER_DISPCTRL);
> > + HVS_WRITE(SCALER_DISPCTRL,
> > + (reg & ~SCALER_DISPCTRL_DSP3_MUX_MASK) |
> > + VC4_SET_FIELD(mux, SCALER_DISPCTRL_DSP3_MUX));
> > break;
> >
> > case 4:
> > - dsp4_mux = vc4_state->assigned_channel;
> > + if (vc4_state->assigned_channel ==
> > VC4_HVS_CHANNEL_DISABLED)
> > + mux = 3;
> > + else
> > + mux = vc4_state->assigned_channel;
> > +
> > + reg = HVS_READ(SCALER_DISPEOLN);
> > + HVS_WRITE(SCALER_DISPEOLN,
> > + (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) |
> > + VC4_SET_FIELD(mux, SCALER_DISPEOLN_DSP4_MUX));
> > +
> > break;
> >
> > case 5:
> > - dsp5_mux = vc4_state->assigned_channel;
> > + if (vc4_state->assigned_channel ==
> > VC4_HVS_CHANNEL_DISABLED)
> > + mux = 3;
> > + else
> > + mux = vc4_state->assigned_channel;
> > +
> > + reg = HVS_READ(SCALER_DISPDITHER);
> > + HVS_WRITE(SCALER_DISPDITHER,
> > + (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) |
> > + VC4_SET_FIELD(mux,
> > SCALER_DISPDITHER_DSP5_MUX));
> > break;
> >
> > default:
> > break;
> > }
> > }
> > -
> > - reg = HVS_READ(SCALER_DISPECTRL);
> > - HVS_WRITE(SCALER_DISPECTRL,
> > - (reg & ~SCALER_DISPECTRL_DSP2_MUX_MASK) |
>
Re: [PATCH v2 7/7] drm/vc4: kms: Don't disable the muxing of an active CRTC
Hi Maxime,
On 10/28/20 9:41 PM, Maxime Ripard wrote:
> The current HVS muxing code will consider the CRTCs in a given state to
> setup their muxing in the HVS, and disable the other CRTCs muxes.
>
> However, it's valid to only update a single CRTC with a state, and in this
> situation we would mux out a CRTC that was enabled but left untouched by
> the new state.
>
> Fix this by setting a flag on the CRTC state when the muxing has been
> changed, and only change the muxing configuration when that flag is there.
>
> Fixes: 87ebcd42fb7b ("drm/vc4: crtc: Assign output to channel automatically")
> Signed-off-by: Maxime Ripard
I checked all patches well works.
All patches:
Reviewed-by: Hoegeun Kwon
Tested-by: Hoegeun Kwon
Best regards,
Hoegeun
> ---
> drivers/gpu/drm/vc4/vc4_drv.h | 1 +-
> drivers/gpu/drm/vc4/vc4_kms.c | 84 +---
> 2 files changed, 50 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
> index c6208b040f77..c074c0538e57 100644
> --- a/drivers/gpu/drm/vc4/vc4_drv.h
> +++ b/drivers/gpu/drm/vc4/vc4_drv.h
> @@ -523,6 +523,7 @@ struct vc4_crtc_state {
> struct drm_mm_node mm;
> bool feed_txp;
> bool txp_armed;
> + bool needs_muxing;
> unsigned int assigned_channel;
>
> struct {
> diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
> index 2aa726b7422c..409aeb19d210 100644
> --- a/drivers/gpu/drm/vc4/vc4_kms.c
> +++ b/drivers/gpu/drm/vc4/vc4_kms.c
> @@ -224,10 +224,7 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev *vc4,
> {
> struct drm_crtc_state *crtc_state;
> struct drm_crtc *crtc;
> - unsigned char dsp2_mux = 0;
> - unsigned char dsp3_mux = 3;
> - unsigned char dsp4_mux = 3;
> - unsigned char dsp5_mux = 3;
> + unsigned char mux;
> unsigned int i;
> u32 reg;
>
> @@ -235,50 +232,59 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev
> *vc4,
> struct vc4_crtc_state *vc4_state =
> to_vc4_crtc_state(crtc_state);
> struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
>
> - if (!crtc_state->active)
> + if (!vc4_state->needs_muxing)
> continue;
>
> switch (vc4_crtc->data->hvs_output) {
> case 2:
> - dsp2_mux = (vc4_state->assigned_channel == 2) ? 0 : 1;
> + mux = (vc4_state->assigned_channel == 2) ? 0 : 1;
> + reg = HVS_READ(SCALER_DISPECTRL);
> + HVS_WRITE(SCALER_DISPECTRL,
> + (reg & ~SCALER_DISPECTRL_DSP2_MUX_MASK) |
> + VC4_SET_FIELD(mux,
> SCALER_DISPECTRL_DSP2_MUX));
> break;
>
> case 3:
> - dsp3_mux = vc4_state->assigned_channel;
> + if (vc4_state->assigned_channel ==
> VC4_HVS_CHANNEL_DISABLED)
> + mux = 3;
> + else
> + mux = vc4_state->assigned_channel;
> +
> + reg = HVS_READ(SCALER_DISPCTRL);
> + HVS_WRITE(SCALER_DISPCTRL,
> + (reg & ~SCALER_DISPCTRL_DSP3_MUX_MASK) |
> + VC4_SET_FIELD(mux, SCALER_DISPCTRL_DSP3_MUX));
> break;
>
> case 4:
> - dsp4_mux = vc4_state->assigned_channel;
> + if (vc4_state->assigned_channel ==
> VC4_HVS_CHANNEL_DISABLED)
> + mux = 3;
> + else
> + mux = vc4_state->assigned_channel;
> +
> + reg = HVS_READ(SCALER_DISPEOLN);
> + HVS_WRITE(SCALER_DISPEOLN,
> + (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) |
> + VC4_SET_FIELD(mux, SCALER_DISPEOLN_DSP4_MUX));
> +
> break;
>
> case 5:
> - dsp5_mux = vc4_state->assigned_channel;
> + if (vc4_state->assigned_channel ==
> VC4_HVS_CHANNEL_DISABLED)
> + mux = 3;
> + else
> + mux = vc4_state->assigned_channel;
> +
> + reg = HVS_READ(SCALER_DISPDITHER);
> + HVS_WRITE(SCALER_DISPDITHER,
> + (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) |
> + VC4_SET_FIELD(mux,
> SCALER_DISPDITHER_DSP5_MUX));
> break;
>
> default:
> break;
> }
> }
> -
> - reg = HVS_READ(SCALER_DISPECTRL);
> - HVS_WRITE(SCALER_DISPECTRL,
> - (reg & ~SCALER_DISPECTRL_DSP2_MUX_MASK) |
> - VC4_SET_FIELD(dsp2_mux, SCALER_DISPECTRL_DSP2_MUX));
> -
> - reg
Re: [PATCH v2 7/7] drm/vc4: kms: Don't disable the muxing of an active CRTC
Hi Maxime,
Thanks for V2 patch.
On 10/28/20 9:41 PM, Maxime Ripard wrote:
> The current HVS muxing code will consider the CRTCs in a given state to
> setup their muxing in the HVS, and disable the other CRTCs muxes.
>
> However, it's valid to only update a single CRTC with a state, and in this
> situation we would mux out a CRTC that was enabled but left untouched by
> the new state.
>
> Fix this by setting a flag on the CRTC state when the muxing has been
> changed, and only change the muxing configuration when that flag is there.
>
> Fixes: 87ebcd42fb7b ("drm/vc4: crtc: Assign output to channel automatically")
> Signed-off-by: Maxime Ripard
> ---
> drivers/gpu/drm/vc4/vc4_drv.h | 1 +-
> drivers/gpu/drm/vc4/vc4_kms.c | 84 +---
> 2 files changed, 50 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
> index c6208b040f77..c074c0538e57 100644
> --- a/drivers/gpu/drm/vc4/vc4_drv.h
> +++ b/drivers/gpu/drm/vc4/vc4_drv.h
> @@ -523,6 +523,7 @@ struct vc4_crtc_state {
> struct drm_mm_node mm;
> bool feed_txp;
> bool txp_armed;
> + bool needs_muxing;
> unsigned int assigned_channel;
>
> struct {
> diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
> index 2aa726b7422c..409aeb19d210 100644
> --- a/drivers/gpu/drm/vc4/vc4_kms.c
> +++ b/drivers/gpu/drm/vc4/vc4_kms.c
> @@ -224,10 +224,7 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev *vc4,
> {
> struct drm_crtc_state *crtc_state;
> struct drm_crtc *crtc;
> - unsigned char dsp2_mux = 0;
> - unsigned char dsp3_mux = 3;
> - unsigned char dsp4_mux = 3;
> - unsigned char dsp5_mux = 3;
> + unsigned char mux;
> unsigned int i;
> u32 reg;
>
> @@ -235,50 +232,59 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev
> *vc4,
> struct vc4_crtc_state *vc4_state =
> to_vc4_crtc_state(crtc_state);
> struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
>
> - if (!crtc_state->active)
> + if (!vc4_state->needs_muxing)
> continue;
>
> switch (vc4_crtc->data->hvs_output) {
> case 2:
> - dsp2_mux = (vc4_state->assigned_channel == 2) ? 0 : 1;
> + mux = (vc4_state->assigned_channel == 2) ? 0 : 1;
> + reg = HVS_READ(SCALER_DISPECTRL);
> + HVS_WRITE(SCALER_DISPECTRL,
> + (reg & ~SCALER_DISPECTRL_DSP2_MUX_MASK) |
> + VC4_SET_FIELD(mux,
> SCALER_DISPECTRL_DSP2_MUX));
> break;
>
> case 3:
> - dsp3_mux = vc4_state->assigned_channel;
> + if (vc4_state->assigned_channel ==
> VC4_HVS_CHANNEL_DISABLED)
> + mux = 3;
> + else
> + mux = vc4_state->assigned_channel;
> +
> + reg = HVS_READ(SCALER_DISPCTRL);
> + HVS_WRITE(SCALER_DISPCTRL,
> + (reg & ~SCALER_DISPCTRL_DSP3_MUX_MASK) |
> + VC4_SET_FIELD(mux, SCALER_DISPCTRL_DSP3_MUX));
> break;
>
> case 4:
> - dsp4_mux = vc4_state->assigned_channel;
> + if (vc4_state->assigned_channel ==
> VC4_HVS_CHANNEL_DISABLED)
> + mux = 3;
> + else
> + mux = vc4_state->assigned_channel;
> +
> + reg = HVS_READ(SCALER_DISPEOLN);
> + HVS_WRITE(SCALER_DISPEOLN,
> + (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) |
> + VC4_SET_FIELD(mux, SCALER_DISPEOLN_DSP4_MUX));
> +
> break;
>
> case 5:
> - dsp5_mux = vc4_state->assigned_channel;
> + if (vc4_state->assigned_channel ==
> VC4_HVS_CHANNEL_DISABLED)
> + mux = 3;
> + else
> + mux = vc4_state->assigned_channel;
> +
> + reg = HVS_READ(SCALER_DISPDITHER);
> + HVS_WRITE(SCALER_DISPDITHER,
> + (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) |
> + VC4_SET_FIELD(mux,
> SCALER_DISPDITHER_DSP5_MUX));
> break;
>
> default:
> break;
> }
> }
> -
> - reg = HVS_READ(SCALER_DISPECTRL);
> - HVS_WRITE(SCALER_DISPECTRL,
> - (reg & ~SCALER_DISPECTRL_DSP2_MUX_MASK) |
> - VC4_SET_FIELD(dsp2_mux, SCALER_DISPECTRL_DSP2_MUX));
> -
> - reg = HVS_READ(SCALER_DISPCTRL);
> - HVS_WRITE(SCALER_DISPCTRL,
> - (reg &
