Re: [PATCH 1/4] drm/edid: Pass connector to AVI inforframe functions

["Ville Syrjälä" <ville.syrjala-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>]

On Tue, Dec 04, 2018 at 08:46:53AM +0100, Andrzej Hajda wrote:
> On 03.12.2018 22:38, Ville Syrjälä wrote:
> > On Thu, Nov 29, 2018 at 10:08:07AM +0100, Andrzej Hajda wrote:
> >> On 21.11.2018 19:19, Laurent Pinchart wrote:
> >>> Hi Ville,
> >>>
> >>> Thank you for the patch.
> >>>
> >>> On Tuesday, 20 November 2018 18:13:42 EET Ville Syrjala wrote:
> >>>> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> >>>>
> >>>> Make life easier for drivers by simply passing the connector
> >>>> to drm_hdmi_avi_infoframe_from_display_mode() and
> >>>> drm_hdmi_avi_infoframe_quant_range(). That way drivers don't
> >>>> need to worry about is_hdmi2_sink mess.
> >>> While this is good for display controller drivers, the change isn't great for 
> >>> bridge drivers. Down the road we're looking at moving connector support out of 
> >>> the bridge drivers. Adding an additional dependency to connectors in the 
> >>> bridges will make that more difficult. Ideally bridges should retrieve the 
> >>> information from their sink, regardless of whether it is a connector or 
> >>> another bridge.
> >>
> >> I agree with it, and case of sii8620 shows that there are cases where
> >> bridge has no direct access to the connector.
> > It's just a matter of plumbing it through.
> 
> 
> What do you mean exactly?

void bridge_foo(...
+               ,struct drm_connector *connector);

> 
> 
> >
> >> On the other side,  since you are passing connector to
> >> drm_hdmi_avi_infoframe_from_display_mode(), you could drop mode
> >> parameter and rename the function to
> >> drm_hdmi_avi_infoframe_from_connector() then, unless mode passed and
> >> mode set on the connector differs?
> > Connectors don't have a mode.
> 
> 
> As they are passing video stream they should have it, even if not
> directly, for example:
> 
> connector->state->crtc->mode

That's not really how atomic works. One shouldn't go digging
through the obj->state pointers when we're not holding the
relevant locks anymore. The atomic way would be to pass either
both crtc state and connector state, or drm_atomic_state +
crtc/connector.

> 
> In moment of creating infoframe it should be set properly.
> 
> 
> Regards
> 
> Andrzej
> 
> 
> >
> >>
> >> Regards
> >>
> >> Andrzej
> >>
> >>
> >>> Please see below for an additional comment.
> >>>
> >>>> Cc: Alex Deucher <alexander.deucher@amd.com>
> >>>> Cc: "Christian König" <christian.koenig@amd.com>
> >>>> Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com>
> >>>> Cc: Archit Taneja <architt@codeaurora.org>
> >>>> Cc: Andrzej Hajda <a.hajda@samsung.com>
> >>>> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> >>>> Cc: Inki Dae <inki.dae@samsung.com>
> >>>> Cc: Joonyoung Shim <jy0922.shim@samsung.com>
> >>>> Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
> >>>> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> >>>> Cc: Russell King <linux@armlinux.org.uk>
> >>>> Cc: CK Hu <ck.hu@mediatek.com>
> >>>> Cc: Philipp Zabel <p.zabel@pengutronix.de>
> >>>> Cc: Rob Clark <robdclark@gmail.com>
> >>>> Cc: Ben Skeggs <bskeggs@redhat.com>
> >>>> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> >>>> Cc: Sandy Huang <hjc@rock-chips.com>
> >>>> Cc: "Heiko Stübner" <heiko@sntech.de>
> >>>> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> >>>> Cc: Vincent Abriou <vincent.abriou@st.com>
> >>>> Cc: Thierry Reding <thierry.reding@gmail.com>
> >>>> Cc: Eric Anholt <eric@anholt.net>
> >>>> Cc: Shawn Guo <shawnguo@kernel.org>
> >>>> Cc: Ilia Mirkin <imirkin@alum.mit.edu>
> >>>> Cc: amd-gfx@lists.freedesktop.org
> >>>> Cc: linux-arm-msm@vger.kernel.org
> >>>> Cc: freedreno@lists.freedesktop.org
> >>>> Cc: nouveau@lists.freedesktop.org
> >>>> Cc: linux-tegra@vger.kernel.org
> >>>> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> >>>> ---
> >>>>  drivers/gpu/drm/amd/amdgpu/dce_v10_0.c    |  2 +-
> >>>>  drivers/gpu/drm/amd/amdgpu/dce_v11_0.c    |  2 +-
> >>>>  drivers/gpu/drm/amd/amdgpu/dce_v6_0.c     |  3 ++-
> >>>>  drivers/gpu/drm/amd/amdgpu/dce_v8_0.c     |  2 +-
> >>>>  drivers/gpu/drm/bridge/analogix-anx78xx.c |  5 ++--
> >>>>  drivers/gpu/drm/bridge/sii902x.c          |  3 ++-
> >>>>  drivers/gpu/drm/bridge/sil-sii8620.c      |  3 +--
> >>>>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c |  3 ++-
> >>>>  drivers/gpu/drm/drm_edid.c                | 33 ++++++++++++++---------
> >>>>  drivers/gpu/drm/exynos/exynos_hdmi.c      |  3 ++-
> >>>>  drivers/gpu/drm/i2c/tda998x_drv.c         |  3 ++-
> >>>>  drivers/gpu/drm/i915/intel_hdmi.c         | 14 +++++-----
> >>>>  drivers/gpu/drm/i915/intel_lspcon.c       | 15 ++++++-----
> >>>>  drivers/gpu/drm/i915/intel_sdvo.c         | 10 ++++---
> >>>>  drivers/gpu/drm/mediatek/mtk_hdmi.c       |  3 ++-
> >>>>  drivers/gpu/drm/msm/hdmi/hdmi_bridge.c    |  3 ++-
> >>>>  drivers/gpu/drm/nouveau/dispnv50/disp.c   |  7 +++--
> >>>>  drivers/gpu/drm/omapdrm/omap_encoder.c    |  5 ++--
> >>>>  drivers/gpu/drm/radeon/radeon_audio.c     |  2 +-
> >>>>  drivers/gpu/drm/rockchip/inno_hdmi.c      |  4 ++-
> >>>>  drivers/gpu/drm/sti/sti_hdmi.c            |  3 ++-
> >>>>  drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c    |  3 ++-
> >>>>  drivers/gpu/drm/tegra/hdmi.c              |  3 ++-
> >>>>  drivers/gpu/drm/tegra/sor.c               |  3 ++-
> >>>>  drivers/gpu/drm/vc4/vc4_hdmi.c            | 11 +++++---
> >>>>  drivers/gpu/drm/zte/zx_hdmi.c             |  4 ++-
> >>>>  include/drm/drm_edid.h                    |  8 +++---
> >>>>  27 files changed, 94 insertions(+), 66 deletions(-)
> >>> For dw-hdmi and omapdrm,
> >>>
> >>> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> >>>

-- 
Ville Syrjälä
Intel
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