[PATCH v2 2/2] drm/i915/gen9: Add support for pipe background color (v2)
Ville Syrjälä
ville.syrjala at linux.intel.com
Thu Feb 11 16:22:26 UTC 2016
On Thu, Feb 11, 2016 at 08:05:26AM -0800, Matt Roper wrote:
> On Thu, Feb 11, 2016 at 12:00:50PM +0200, Ville Syrjälä wrote:
> > On Wed, Feb 10, 2016 at 06:32:59PM -0800, Matt Roper wrote:
> > > Gen9 platforms allow CRTC's to be programmed with a background/canvas
> > > color below the programmable planes. Let's expose this as a property to
> > > allow userspace to program a desired value.
> > >
> > > This patch is based on earlier work by Chandra Konduru; unfortunately
> > > the driver has evolved so much since his patches were written (in the
> > > pre-atomic era) that the functionality had to be pretty much completely
> > > rewritten for the new i915 atomic internals.
> > >
> > > v2:
> > > - Set initial background color (black) via proper helper function (Bob)
> > > - Fix debugfs output
> > > - General rebasing
> > >
> > > Cc: Chandra Konduru <chandra.konduru at intel.com>
> > > Cc: Bob Paauwe <bob.j.paauwe at intel.com>
> > > Cc: dri-devel at lists.freedesktop.org
> > > Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> > > ---
> > > Documentation/DocBook/gpu.tmpl | 10 +++++++-
> > > drivers/gpu/drm/i915/i915_debugfs.c | 8 +++++++
> > > drivers/gpu/drm/i915/i915_reg.h | 9 +++++++
> > > drivers/gpu/drm/i915/intel_display.c | 46 ++++++++++++++++++++++++++++++++++++
> > > 4 files changed, 72 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/Documentation/DocBook/gpu.tmpl b/Documentation/DocBook/gpu.tmpl
> > > index fe6b36a..9e003cd 100644
> > > --- a/Documentation/DocBook/gpu.tmpl
> > > +++ b/Documentation/DocBook/gpu.tmpl
> > > @@ -2092,7 +2092,7 @@ void intel_crt_init(struct drm_device *dev)
> > > <td valign="top" >TBD</td>
> > > </tr>
> > > <tr>
> > > - <td rowspan="20" valign="top" >i915</td>
> > > + <td rowspan="21" valign="top" >i915</td>
> > > <td rowspan="2" valign="top" >Generic</td>
> > > <td valign="top" >"Broadcast RGB"</td>
> > > <td valign="top" >ENUM</td>
> > > @@ -2108,6 +2108,14 @@ void intel_crt_init(struct drm_device *dev)
> > > <td valign="top" >TBD</td>
> > > </tr>
> > > <tr>
> > > + <td rowspan="1" valign="top" >CRTC</td>
> > > + <td valign="top" >“background_color”</td>
> > > + <td valign="top" >RGBA</td>
> > > + <td valign="top" > </td>
> > > + <td valign="top" >CRTC</td>
> > > + <td valign="top" >Background color of regions not covered by a plane</td>
> > > + </tr>
> > > + <tr>
> > > <td rowspan="17" valign="top" >SDVO-TV</td>
> > > <td valign="top" >“mode”</td>
> > > <td valign="top" >ENUM</td>
> > > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> > > index ec0c2a05e..e7352fc 100644
> > > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > > @@ -3104,6 +3104,14 @@ static int i915_display_info(struct seq_file *m, void *unused)
> > > intel_scaler_info(m, crtc);
> > > intel_plane_info(m, crtc);
> > > }
> > > + if (INTEL_INFO(dev)->gen >= 9 && pipe_config->base.active) {
> > > + struct drm_rgba background = pipe_config->base.background_color;
> > > +
> > > + seq_printf(m, "\tbackground color (10bpc): r=%x g=%x b=%x\n",
> > > + DRM_RGBA_REDBITS(background, 10),
> > > + DRM_RGBA_GREENBITS(background, 10),
> > > + DRM_RGBA_BLUEBITS(background, 10));
> > > + }
> > >
> > > seq_printf(m, "\tunderrun reporting: cpu=%s pch=%s \n",
> > > yesno(!crtc->cpu_fifo_underrun_disabled),
> > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > > index 144586e..b0b014d 100644
> > > --- a/drivers/gpu/drm/i915/i915_reg.h
> > > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > > @@ -7649,6 +7649,15 @@ enum skl_disp_power_wells {
> > > #define PIPE_CSC_POSTOFF_ME(pipe) _MMIO_PIPE(pipe, _PIPE_A_CSC_POSTOFF_ME, _PIPE_B_CSC_POSTOFF_ME)
> > > #define PIPE_CSC_POSTOFF_LO(pipe) _MMIO_PIPE(pipe, _PIPE_A_CSC_POSTOFF_LO, _PIPE_B_CSC_POSTOFF_LO)
> > >
> > > +/* Skylake pipe bottom color */
> > > +#define _PIPE_BOTTOM_COLOR_A 0x70034
> > > +#define _PIPE_BOTTOM_COLOR_B 0x71034
> > > +#define _PIPE_BOTTOM_COLOR_C 0x72034
> > > +#define PIPE_BOTTOM_GAMMA_ENABLE (1 << 31)
> > > +#define PIPE_BOTTOM_CSC_ENABLE (1 << 30)
> > > +#define PIPE_BOTTOM_COLOR_MASK 0x3FFFFFFF
> > > +#define PIPE_BOTTOM_COLOR(pipe) _MMIO_PIPE(pipe, _PIPE_BOTTOM_COLOR_A, _PIPE_BOTTOM_COLOR_B)
> > > +
> > > /* MIPI DSI registers */
> > >
> > > #define _MIPI_PORT(port, a, c) _PORT3(port, a, 0, c) /* ports A and C only */
> > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > > index 836bbdc..a616ac42 100644
> > > --- a/drivers/gpu/drm/i915/intel_display.c
> > > +++ b/drivers/gpu/drm/i915/intel_display.c
> > > @@ -3299,6 +3299,8 @@ static void intel_update_pipe_config(struct intel_crtc *crtc,
> > > struct drm_i915_private *dev_priv = dev->dev_private;
> > > struct intel_crtc_state *pipe_config =
> > > to_intel_crtc_state(crtc->base.state);
> > > + struct drm_rgba background = pipe_config->base.background_color;
> > > + uint32_t val;
> > >
> > > /* drm_atomic_helper_update_legacy_modeset_state might not be called. */
> > > crtc->base.mode = crtc->base.state->mode;
> > > @@ -3335,6 +3337,26 @@ static void intel_update_pipe_config(struct intel_crtc *crtc,
> > > else if (old_crtc_state->pch_pfit.enabled)
> > > ironlake_pfit_disable(crtc, true);
> > > }
> > > +
> > > + if (INTEL_INFO(dev)->gen >= 9) {
> > > + /* BGR 16bpc ==> RGB 10bpc */
> > > + val = DRM_RGBA_REDBITS(background, 10) << 20
> > > + | DRM_RGBA_GREENBITS(background, 10) << 10
> > > + | DRM_RGBA_BLUEBITS(background, 10);
> >
> > I'm not a fan of the drm_rgba thing having alpha in the low bits. It
> > goes against the existing precedent set by eg. the colorkey ioctls
> > where alpha (if it would be used) would be in the high bits. I think I
> > complained about this before already, or maybe it was also about
> > some BGR vs. RGB ordering thing?
> >
> > Looks like drm_rgba isn't actually part of this series, and I can't see
> > it in the tree either, so I guess it comes in via some other series?
>
> drm_rgba was in patch #1 of this series; if that didn't come through for
> you, it's in patchwork here:
> https://patchwork.freedesktop.org/patch/73224/
It did come through, but somehow I didn't see it.
>
> We could certainly flip around the internal ordering of bits, but I'm
> not sure it really matters. The whole point of drm_rgba is to be
> somewhat opaque so that drivers don't try to work directly on the
> internal representation (and potentially misinterpret the format).
Sure. Just goes against existing practice a bit. And feels a bit
strange to have the component that's most often the one that's not
present occupy the low bits.
OTOH the fact that RGBA is a fairly obscure format hardware wise,
might catch people trying using the API the wrong way.
>
>
> Matt
>
> >
> > > +
> > > + /*
> > > + * Set CSC and gamma for bottom color.
> > > + *
> > > + * FIXME: We turn these on unconditionally for now to match
> > > + * how we've setup the various planes. Once the color
> > > + * management framework lands, it may or may not choose to
> > > + * set these bits.
> > > + */
> > > + val |= PIPE_BOTTOM_CSC_ENABLE;
> > > + val |= PIPE_BOTTOM_GAMMA_ENABLE;
> > > +
> > > + I915_WRITE(PIPE_BOTTOM_COLOR(crtc->pipe), val);
> > > + }
> > > }
> > >
> > > static void intel_fdi_normal_train(struct drm_crtc *crtc)
> > > @@ -12032,6 +12054,9 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc,
> > > pipe_config);
> > > }
> > >
> > > + if (crtc->state->background_color.v != crtc_state->background_color.v)
> > > + pipe_config->update_pipe = true;
> > > +
> > > return ret;
> > > }
> > >
> > > @@ -13660,6 +13685,7 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
> > > .set_config = drm_atomic_helper_set_config,
> > > .destroy = intel_crtc_destroy,
> > > .page_flip = intel_crtc_page_flip,
> > > + .set_property = drm_atomic_helper_crtc_set_property,
> > > .atomic_duplicate_state = intel_crtc_duplicate_state,
> > > .atomic_destroy_state = intel_crtc_destroy_state,
> > > };
> > > @@ -14254,6 +14280,20 @@ static void skl_init_scalers(struct drm_device *dev, struct intel_crtc *intel_cr
> > > scaler_state->scaler_id = -1;
> > > }
> > >
> > > +static void intel_create_background_color_property(struct drm_device *dev,
> > > + struct intel_crtc *crtc)
> > > +{
> > > + if (!dev->mode_config.prop_background_color)
> > > + dev->mode_config.prop_background_color =
> > > + drm_mode_create_background_color_property(dev);
> > > + if (!dev->mode_config.prop_background_color)
> > > + return;
> > > +
> > > + drm_object_attach_property(&crtc->base.base,
> > > + dev->mode_config.prop_background_color,
> > > + crtc->base.state->background_color.v);
> > > +}
> > > +
> > > static void intel_crtc_init(struct drm_device *dev, int pipe)
> > > {
> > > struct drm_i915_private *dev_priv = dev->dev_private;
> > > @@ -14329,6 +14369,12 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
> > > drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
> > >
> > > WARN_ON(drm_crtc_index(&intel_crtc->base) != intel_crtc->pipe);
> > > +
> > > + if (INTEL_INFO(dev)->gen >= 9) {
> > > + crtc_state->base.background_color = drm_rgba(16, 0, 0, 0, 0);
> > > + intel_create_background_color_property(dev, intel_crtc);
> > > + }
> > > +
> > > return;
> > >
> > > fail:
> > > --
> > > 2.1.4
> > >
> > > _______________________________________________
> > > dri-devel mailing list
> > > dri-devel at lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> >
> > --
> > Ville Syrjälä
> > Intel OTC
>
> --
> Matt Roper
> Graphics Software Engineer
> IoTG Platform Enabling & Development
> Intel Corporation
> (916) 356-2795
--
Ville Syrjälä
Intel OTC
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