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Wed, 30 Apr 2025 13:41:23 -0700 (PDT) Received: from iku.example.org ([2a06:5906:61b:2d00:c5ac:bf15:f358:81a8]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a073ca56d5sm18098132f8f.32.2025.04.30.13.41.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Apr 2025 13:41:23 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Biju Das , Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Philipp Zabel , Magnus Damm Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, Prabhakar , Fabrizio Castro , Lad Prabhakar Subject: [PATCH v4 06/15] drm: renesas: rz-du: mipi_dsi: Add min check for VCLK range Date: Wed, 30 Apr 2025 21:41:03 +0100 Message-ID: <20250430204112.342123-7-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250430204112.342123-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20250430204112.342123-1-prabhakar.mahadev-lad.rj@bp.renesas.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" From: Lad Prabhakar The VCLK range for Renesas RZ/G2L SoC is 148.5 MHz to 5.803 MHz. Add a minimum clock check in the mode_valid callback to ensure that the clock value does not fall below the valid range. Co-developed-by: Fabrizio Castro Signed-off-by: Fabrizio Castro Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das --- v3->v4: - No changes v2->v3: - No changes v1->v2: - No changes --- drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/d= rm/renesas/rz-du/rzg2l_mipi_dsi.c index 4550c6d84796..ec8baecb9ba5 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -584,6 +584,9 @@ rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bri= dge, if (mode->clock > 148500) return MODE_CLOCK_HIGH; =20 + if (mode->clock < 5803) + return MODE_CLOCK_LOW; + return MODE_OK; } =20 --=20 2.49.0