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Wed, 03 Dec 2025 22:14:47 -0800 (PST) From: Svyatoslav Ryhel To: Thierry Reding , Thierry Reding , Mikko Perttunen , David Airlie , Simona Vetter , Jonathan Hunter , Svyatoslav Ryhel Cc: dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 2/2 RESEND] gpu/drm: tegra: dsi: calculate packet parameters for video mode Date: Thu, 4 Dec 2025 08:14:36 +0200 Message-ID: <20251204061436.5401-3-clamor95@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251204061436.5401-1-clamor95@gmail.com> References: <20251204061436.5401-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Calculate packet parameters for video mode same way it is done or command mode, by halving timings plugged into equations. Signed-off-by: Svyatoslav Ryhel --- drivers/gpu/drm/tegra/dsi.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index aab555a2eb68..1ec3f03d2577 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -545,12 +545,19 @@ static void tegra_dsi_configure(struct tegra_dsi *dsi= , unsigned int pipe, /* horizontal back porch */ hbp =3D (mode->htotal - mode->hsync_end) * mul / div; =20 - if ((dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) =3D=3D 0) - hbp +=3D hsw; - /* horizontal front porch */ hfp =3D (mode->hsync_start - mode->hdisplay) * mul / div; =20 + if (dsi->master || dsi->slave) { + hact /=3D 2; + hsw /=3D 2; + hbp /=3D 2; + hfp /=3D 2; + } + + if ((dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) =3D=3D 0) + hbp +=3D hsw; + /* subtract packet overhead */ hsw -=3D 10; hbp -=3D 14; --=20 2.48.1