| Message ID | 469ead5de989938fcf079505cbc232a620e713bc.1603888799.git-series.maxime@cerno.tech (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/vc4: Rework the HVS muxing code | expand |
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 <maxime@cerno.tech> > --- > 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 & ~SCALER_DISPCTRL_DSP3_MUX_MASK) | > - VC4_SET_FIELD(dsp3_mux, SCALER_DISPCTRL_DSP3_MUX)); > - > - reg = HVS_READ(SCALER_DISPEOLN); > - HVS_WRITE(SCALER_DISPEOLN, > - (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) | > - VC4_SET_FIELD(dsp4_mux, SCALER_DISPEOLN_DSP4_MUX)); > - > - reg = HVS_READ(SCALER_DISPDITHER); > - HVS_WRITE(SCALER_DISPDITHER, > - (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) | > - VC4_SET_FIELD(dsp5_mux, SCALER_DISPDITHER_DSP5_MUX)); > } > > static void > @@ -769,21 +775,29 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, > return -EINVAL; > > for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { > + struct vc4_crtc_state *old_vc4_crtc_state = > + to_vc4_crtc_state(old_crtc_state); In my opinion, the old_vc4_crtc_state definition is better to move to patch6. Build error occurs in patch6 because old_vc4_crtc_state is used in patch6. Best regards, Hoegeun > struct vc4_crtc_state *new_vc4_crtc_state = > to_vc4_crtc_state(new_crtc_state); > struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); > unsigned int matching_channels; > > - if (old_crtc_state->enable && !new_crtc_state->enable) { > - hvs_state->unassigned_channels |= BIT(old_vc4_crtc_state->assigned_channel); > - new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; > + /* Nothing to do here, let's skip it */ > + if ((old_crtc_state->enable && new_crtc_state->enable) || > + (!old_crtc_state->enable && !new_crtc_state->enable)) { > + new_vc4_crtc_state->needs_muxing = false; > + continue; > } > > - if (!new_crtc_state->enable) > - continue; > + /* Muxing will need to be modified, mark it as such */ > + new_vc4_crtc_state->needs_muxing = true; > > - if (new_vc4_crtc_state->assigned_channel != VC4_HVS_CHANNEL_DISABLED) > + /* If we're disabling our CRTC, we put back our channel */ > + if (old_crtc_state->enable && !new_crtc_state->enable) { > + hvs_state->unassigned_channels |= BIT(old_vc4_crtc_state->assigned_channel); > + new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; > continue; > + } > > /* > * The problem we have to solve here is that we have
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 <maxime@cerno.tech> I checked all patches well works. All patches: Reviewed-by: Hoegeun Kwon<hoegeun.kwon@samsung.com> Tested-by: Hoegeun Kwon<hoegeun.kwon@samsung.com> 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 = HVS_READ(SCALER_DISPCTRL); > - HVS_WRITE(SCALER_DISPCTRL, > - (reg & ~SCALER_DISPCTRL_DSP3_MUX_MASK) | > - VC4_SET_FIELD(dsp3_mux, SCALER_DISPCTRL_DSP3_MUX)); > - > - reg = HVS_READ(SCALER_DISPEOLN); > - HVS_WRITE(SCALER_DISPEOLN, > - (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) | > - VC4_SET_FIELD(dsp4_mux, SCALER_DISPEOLN_DSP4_MUX)); > - > - reg = HVS_READ(SCALER_DISPDITHER); > - HVS_WRITE(SCALER_DISPDITHER, > - (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) | > - VC4_SET_FIELD(dsp5_mux, SCALER_DISPDITHER_DSP5_MUX)); > } > > static void > @@ -769,21 +775,29 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, > return -EINVAL; > > for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { > + struct vc4_crtc_state *old_vc4_crtc_state = > + to_vc4_crtc_state(old_crtc_state); > struct vc4_crtc_state *new_vc4_crtc_state = > to_vc4_crtc_state(new_crtc_state); > struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); > unsigned int matching_channels; > > - if (old_crtc_state->enable && !new_crtc_state->enable) { > - hvs_state->unassigned_channels |= BIT(old_vc4_crtc_state->assigned_channel); > - new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; > + /* Nothing to do here, let's skip it */ > + if ((old_crtc_state->enable && new_crtc_state->enable) || > + (!old_crtc_state->enable && !new_crtc_state->enable)) { > + new_vc4_crtc_state->needs_muxing = false; > + continue; > } > > - if (!new_crtc_state->enable) > - continue; > + /* Muxing will need to be modified, mark it as such */ > + new_vc4_crtc_state->needs_muxing = true; > > - if (new_vc4_crtc_state->assigned_channel != VC4_HVS_CHANNEL_DISABLED) > + /* If we're disabling our CRTC, we put back our channel */ > + if (old_crtc_state->enable && !new_crtc_state->enable) { > + hvs_state->unassigned_channels |= BIT(old_vc4_crtc_state->assigned_channel); > + new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; > continue; > + } > > /* > * The problem we have to solve here is that we have
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 <maxime@cerno.tech> > > --- > > 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 & ~SCALER_DISPCTRL_DSP3_MUX_MASK) | > > - VC4_SET_FIELD(dsp3_mux, SCALER_DISPCTRL_DSP3_MUX)); > > - > > - reg = HVS_READ(SCALER_DISPEOLN); > > - HVS_WRITE(SCALER_DISPEOLN, > > - (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) | > > - VC4_SET_FIELD(dsp4_mux, SCALER_DISPEOLN_DSP4_MUX)); > > - > > - reg = HVS_READ(SCALER_DISPDITHER); > > - HVS_WRITE(SCALER_DISPDITHER, > > - (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) | > > - VC4_SET_FIELD(dsp5_mux, SCALER_DISPDITHER_DSP5_MUX)); > > } > > > > static void > > @@ -769,21 +775,29 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, > > return -EINVAL; > > > > for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { > > + struct vc4_crtc_state *old_vc4_crtc_state = > > + to_vc4_crtc_state(old_crtc_state); > > In my opinion, the old_vc4_crtc_state definition is better to move to > patch6. > Build error occurs in patch6 because old_vc4_crtc_state is used in patch6. You're totally right, I've fixed it in my third version, thanks! Maxime
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 & ~SCALER_DISPCTRL_DSP3_MUX_MASK) | - VC4_SET_FIELD(dsp3_mux, SCALER_DISPCTRL_DSP3_MUX)); - - reg = HVS_READ(SCALER_DISPEOLN); - HVS_WRITE(SCALER_DISPEOLN, - (reg & ~SCALER_DISPEOLN_DSP4_MUX_MASK) | - VC4_SET_FIELD(dsp4_mux, SCALER_DISPEOLN_DSP4_MUX)); - - reg = HVS_READ(SCALER_DISPDITHER); - HVS_WRITE(SCALER_DISPDITHER, - (reg & ~SCALER_DISPDITHER_DSP5_MUX_MASK) | - VC4_SET_FIELD(dsp5_mux, SCALER_DISPDITHER_DSP5_MUX)); } static void @@ -769,21 +775,29 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, return -EINVAL; for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { + struct vc4_crtc_state *old_vc4_crtc_state = + to_vc4_crtc_state(old_crtc_state); struct vc4_crtc_state *new_vc4_crtc_state = to_vc4_crtc_state(new_crtc_state); struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); unsigned int matching_channels; - if (old_crtc_state->enable && !new_crtc_state->enable) { - hvs_state->unassigned_channels |= BIT(old_vc4_crtc_state->assigned_channel); - new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; + /* Nothing to do here, let's skip it */ + if ((old_crtc_state->enable && new_crtc_state->enable) || + (!old_crtc_state->enable && !new_crtc_state->enable)) { + new_vc4_crtc_state->needs_muxing = false; + continue; } - if (!new_crtc_state->enable) - continue; + /* Muxing will need to be modified, mark it as such */ + new_vc4_crtc_state->needs_muxing = true; - if (new_vc4_crtc_state->assigned_channel != VC4_HVS_CHANNEL_DISABLED) + /* If we're disabling our CRTC, we put back our channel */ + if (old_crtc_state->enable && !new_crtc_state->enable) { + hvs_state->unassigned_channels |= BIT(old_vc4_crtc_state->assigned_channel); + new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; continue; + } /* * The problem we have to solve here is that we have
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 <maxime@cerno.tech> --- drivers/gpu/drm/vc4/vc4_drv.h | 1 +- drivers/gpu/drm/vc4/vc4_kms.c | 84 +++++++++++++++++++++--------------- 2 files changed, 50 insertions(+), 35 deletions(-)