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([188.163.112.70]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-337f4c91a6bsm37542721fa.21.2025.09.09.00.33.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Sep 2025 00:33:55 -0700 (PDT) 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 1/2] gpu/drm: tegra: dsi: make SOL delay calculation mode independent Date: Tue, 9 Sep 2025 10:33:34 +0300 Message-ID: <20250909073335.91531-2-clamor95@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250909073335.91531-1-clamor95@gmail.com> References: <20250909073335.91531-1-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" Move SOL delay calculation outside of video mode conditions. Signed-off-by: Svyatoslav Ryhel --- drivers/gpu/drm/tegra/dsi.c | 41 +++++++++++++++---------------------- 1 file changed, 17 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index 924611061cfa..aab555a2eb68 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -560,11 +560,6 @@ static void tegra_dsi_configure(struct tegra_dsi *dsi,= unsigned int pipe, tegra_dsi_writel(dsi, hact << 16 | hbp, DSI_PKT_LEN_2_3); tegra_dsi_writel(dsi, hfp, DSI_PKT_LEN_4_5); tegra_dsi_writel(dsi, 0x0f0f << 16, DSI_PKT_LEN_6_7); - - /* set SOL delay (for non-burst mode only) */ - tegra_dsi_writel(dsi, 8 * mul / div, DSI_SOL_DELAY); - - /* TODO: implement ganged mode */ } else { u16 bytes; =20 @@ -586,28 +581,26 @@ static void tegra_dsi_configure(struct tegra_dsi *dsi= , unsigned int pipe, value =3D MIPI_DCS_WRITE_MEMORY_START << 8 | MIPI_DCS_WRITE_MEMORY_CONTINUE; tegra_dsi_writel(dsi, value, DSI_DCS_CMDS); + } =20 - /* set SOL delay */ - if (dsi->master || dsi->slave) { - unsigned long delay, bclk, bclk_ganged; - unsigned int lanes =3D state->lanes; - - /* SOL to valid, valid to FIFO and FIFO write delay */ - delay =3D 4 + 4 + 2; - delay =3D DIV_ROUND_UP(delay * mul, div * lanes); - /* FIFO read delay */ - delay =3D delay + 6; - - bclk =3D DIV_ROUND_UP(mode->htotal * mul, div * lanes); - bclk_ganged =3D DIV_ROUND_UP(bclk * lanes / 2, lanes); - value =3D bclk - bclk_ganged + delay + 20; - } else { - /* TODO: revisit for non-ganged mode */ - value =3D 8 * mul / div; - } + /* set SOL delay */ + if (dsi->master || dsi->slave) { + unsigned long delay, bclk, bclk_ganged; + unsigned int lanes =3D state->lanes; =20 - tegra_dsi_writel(dsi, value, DSI_SOL_DELAY); + /* SOL to valid, valid to FIFO and FIFO write delay */ + delay =3D 4 + 4 + 2; + delay =3D DIV_ROUND_UP(delay * mul, div * lanes); + /* FIFO read delay */ + delay =3D delay + 6; + + bclk =3D DIV_ROUND_UP(mode->htotal * mul, div * lanes); + bclk_ganged =3D DIV_ROUND_UP(bclk * lanes / 2, lanes); + value =3D bclk - bclk_ganged + delay + 20; + } else { + value =3D 8 * mul / div; } + tegra_dsi_writel(dsi, value, DSI_SOL_DELAY); =20 if (dsi->slave) { tegra_dsi_configure(dsi->slave, pipe, mode); --=20 2.48.1