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Tue, 08 Apr 2025 13:09:32 -0700 (PDT) Received: from iku.Home ([2a06:5906:61b:2d00:469:6216:b7f8:fc55]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43ec1795782sm174892875e9.26.2025.04.08.13.09.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Apr 2025 13:09:32 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Biju Das , Tomi Valkeinen , Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Philipp Zabel , Magnus Damm , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Fabrizio Castro , Tommaso Merciai , Lad Prabhakar Subject: [PATCH v2 06/15] drm: renesas: rz-du: mipi_dsi: Add min check for VCLK range Date: Tue, 8 Apr 2025 21:09:03 +0100 Message-ID: <20250408200916.93793-7-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408200916.93793-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20250408200916.93793-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 --- v1->v2: - Added Reviewed-by tag from Biju --- 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/drm/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 *bridge, if (mode->clock > 148500) return MODE_CLOCK_HIGH; + if (mode->clock < 5803) + return MODE_CLOCK_LOW; + return MODE_OK; }