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10 Jun 2021 06:59:05 -0700 Received: by stinkbox (sSMTP sendmail emulation); Thu, 10 Jun 2021 16:59:05 +0300 Date: Thu, 10 Jun 2021 16:59:05 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Maxime Ripard Subject: Re: [PATCH v2 4/7] drm/i915/display: Add handling for new "active bpc" property Message-ID: References: <20210608174320.37429-1-wse@tuxedocomputers.com> <20210608174320.37429-5-wse@tuxedocomputers.com> <20210610125036.33fpnaoz4xpiqslw@gilmour> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20210610125036.33fpnaoz4xpiqslw@gilmour> X-Patchwork-Hint: comment X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: amd-gfx@lists.freedesktop.org, sunpeng.li@amd.com, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, airlied@linux.ie, Werner Sembach , tzimmermann@suse.de, rodrigo.vivi@intel.com, alexander.deucher@amd.com, christian.koenig@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Thu, Jun 10, 2021 at 02:50:36PM +0200, Maxime Ripard wrote: > Hi > > On Tue, Jun 08, 2021 at 07:43:17PM +0200, Werner Sembach wrote: > > This commits implements the "active bpc" drm property for the Intel GPU driver. > > > > Signed-off-by: Werner Sembach > > --- > > drivers/gpu/drm/i915/display/intel_display.c | 14 ++++++++++++++ > > drivers/gpu/drm/i915/display/intel_dp.c | 8 ++++++-- > > drivers/gpu/drm/i915/display/intel_dp_mst.c | 4 +++- > > drivers/gpu/drm/i915/display/intel_hdmi.c | 4 +++- > > 4 files changed, 26 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c > > index 64e9107d70f7..50c11b8770a7 100644 > > --- a/drivers/gpu/drm/i915/display/intel_display.c > > +++ b/drivers/gpu/drm/i915/display/intel_display.c > > @@ -10388,6 +10388,9 @@ static int intel_atomic_commit(struct drm_device *dev, > > { > > struct intel_atomic_state *state = to_intel_atomic_state(_state); > > struct drm_i915_private *dev_priv = to_i915(dev); > > + struct drm_connector *connector; > > + struct drm_connector_state *new_conn_state; > > + int i; > > int ret = 0; > > > > state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); > > @@ -10456,6 +10459,17 @@ static int intel_atomic_commit(struct drm_device *dev, > > intel_shared_dpll_swap_state(state); > > intel_atomic_track_fbs(state); > > > > + /* Extract information from crtc to communicate it to userspace as connector properties */ > > + for_each_new_connector_in_state(&state->base, connector, new_conn_state, i) { > > + struct intel_crtc *crtc = to_intel_crtc(new_conn_state->crtc); > > + if (crtc) { > > + struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); > > + new_conn_state->active_bpc = new_crtc_state->pipe_bpp / 3; > > + } > > + else > > + new_conn_state->active_bpc = 0; > > + } > > + > > This seems fairly intrusive, but also commit / commit_tail might not be > the best place to put this, we want to support it at the connector > level. > > Indeed, this will cause some issue if your HDMI output is a bridge for > example, where the commit will be in an entirely different driver that > has no dependency on the HDMI controller one. > > I think it would be best to do that assignment in atomic_check. That > way, if the userspace does a commit with DRM_MODE_ATOMIC_TEST_ONLY it > would know what the output state would have been like. DRM_MODE_ATOMIC_TEST_ONLY isn't allowed to change anything. -- Ville Syrjälä Intel