From: Sandor.yu@nxp.com To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, andrzej.hajda@intel.com, narmstrong@baylibre.com, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com Cc: Sandor.yu@nxp.com, shengjiu.wang@nxp.com, amuel@sholland.org, cai.huoqing@linux.dev, maxime@cerno.tech, hverkuil-cisco@xs4all.nl Subject: [PATCH v1 3/5] drm: bridge: dw_hdmi: Enable GCP only for Deep Color Date: Wed, 6 Apr 2022 16:48:35 +0800 [thread overview] Message-ID: <ebd9830fe35d79153cb0051bed0d255fb004fb63.1649230434.git.Sandor.yu@nxp.com> (raw) In-Reply-To: <cover.1649230434.git.Sandor.yu@nxp.com> In-Reply-To: <cover.1649230434.git.Sandor.yu@nxp.com> From: Sandor Yu <Sandor.yu@nxp.com> HDMI1.4b specification section 6.5.3: Source shall only send GCPs with non-zero CD to sinks that indicate support for Deep Color. DW HDMI GPC default enabled, clear gpc_auto bit for bpp 24. Signed-off-by: Sandor Yu <Sandor.yu@nxp.com> --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index b11577de4836..c7b11582529e 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -1160,6 +1160,14 @@ static void hdmi_video_packetize(struct dw_hdmi *hdmi) HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK); hdmi_writeb(hdmi, val, HDMI_VP_PR_CD); + val = hdmi_readb(hdmi, HDMI_FC_DATAUTO3); + if (color_depth == 4) + /* disable Auto GCP when bpp 24 */ + val &= ~0x4; + else + val |= 0x4; + hdmi_writeb(hdmi, val, HDMI_FC_DATAUTO3); + hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE, HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Sandor.yu@nxp.com To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, andrzej.hajda@intel.com, narmstrong@baylibre.com, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com Cc: Sandor.yu@nxp.com, shengjiu.wang@nxp.com, cai.huoqing@linux.dev, maxime@cerno.tech, harry.wentland@amd.com, hverkuil-cisco@xs4all.nl, amuel@sholland.org Subject: [PATCH v1 3/5] drm: bridge: dw_hdmi: Enable GCP only for Deep Color Date: Wed, 6 Apr 2022 16:48:35 +0800 [thread overview] Message-ID: <ebd9830fe35d79153cb0051bed0d255fb004fb63.1649230434.git.Sandor.yu@nxp.com> (raw) In-Reply-To: <cover.1649230434.git.Sandor.yu@nxp.com> In-Reply-To: <cover.1649230434.git.Sandor.yu@nxp.com> From: Sandor Yu <Sandor.yu@nxp.com> HDMI1.4b specification section 6.5.3: Source shall only send GCPs with non-zero CD to sinks that indicate support for Deep Color. DW HDMI GPC default enabled, clear gpc_auto bit for bpp 24. Signed-off-by: Sandor Yu <Sandor.yu@nxp.com> --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index b11577de4836..c7b11582529e 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -1160,6 +1160,14 @@ static void hdmi_video_packetize(struct dw_hdmi *hdmi) HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK); hdmi_writeb(hdmi, val, HDMI_VP_PR_CD); + val = hdmi_readb(hdmi, HDMI_FC_DATAUTO3); + if (color_depth == 4) + /* disable Auto GCP when bpp 24 */ + val &= ~0x4; + else + val |= 0x4; + hdmi_writeb(hdmi, val, HDMI_FC_DATAUTO3); + hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE, HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF); -- 2.25.1
next prev parent reply other threads:[~2022-04-06 8:47 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-06 8:48 [PATCH v1 0/5] DRM: Bridge: DW_HDMI: Add new features and bug fix Sandor.yu 2022-04-06 8:48 ` Sandor.yu 2022-04-06 8:48 ` [PATCH v1 1/5] drm: bridge: dw_hdmi: cec: Add cec suspend/resume function Sandor.yu 2022-04-06 8:48 ` Sandor.yu 2022-04-06 9:46 ` Hans Verkuil 2022-04-06 9:46 ` Hans Verkuil 2022-04-07 8:30 ` [EXT] " Sandor Yu 2022-04-07 8:30 ` Sandor Yu 2022-04-06 8:48 ` [PATCH v1 2/5] drm: bridge: dw_hdmi: enable overflow workaround for v2.13a Sandor.yu 2022-04-06 8:48 ` Sandor.yu 2022-04-06 9:17 ` Neil Armstrong 2022-04-06 9:17 ` Neil Armstrong 2022-04-07 8:30 ` [EXT] " Sandor Yu 2022-04-07 8:30 ` Sandor Yu 2022-04-06 8:48 ` Sandor.yu [this message] 2022-04-06 8:48 ` [PATCH v1 3/5] drm: bridge: dw_hdmi: Enable GCP only for Deep Color Sandor.yu 2022-04-06 9:20 ` Neil Armstrong 2022-04-06 9:20 ` Neil Armstrong 2022-04-07 8:31 ` [EXT] " Sandor Yu 2022-04-07 8:31 ` Sandor Yu 2022-04-06 8:48 ` [PATCH v1 4/5] drm: bridge: dw_hdmi: add reset function for PHY GEN1 Sandor.yu 2022-04-06 8:48 ` Sandor.yu 2022-04-06 8:48 ` [PATCH v1 5/5] drm: bridge: dw_hdmi: Audio: Add General Parallel Audio (GPA) driver Sandor.yu 2022-04-06 8:48 ` Sandor.yu 2022-04-06 9:27 ` Neil Armstrong 2022-04-06 9:27 ` Neil Armstrong 2022-04-07 8:31 ` [EXT] " Sandor Yu 2022-04-07 8:31 ` Sandor Yu 2022-04-07 8:43 ` [PATCH v1 0/5] DRM: Bridge: DW_HDMI: Add new features and bug fix Philipp Zabel 2022-04-07 8:43 ` Philipp Zabel 2022-04-07 11:46 ` [EXT] " Sandor Yu 2022-04-07 11:46 ` Sandor Yu
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