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Sun, 30 Mar 2025 14:08:11 -0700 (PDT) Received: from iku.Home ([2a06:5906:61b:2d00:8249:9390:e853:c628]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43d91429c36sm69778175e9.0.2025.03.30.14.08.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Mar 2025 14:08:10 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Geert Uytterhoeven , 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 , Mauro Carvalho Chehab , Kieran Bingham , Stephen Boyd , Philipp Zabel Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-media@vger.kernel.org, linux-clk@vger.kernel.org, Prabhakar , Fabrizio Castro , Lad Prabhakar Subject: [PATCH 09/17] drm: renesas: rz-du: mipi_dsi: Simplify HSFREQ calculation Date: Sun, 30 Mar 2025 22:07:05 +0100 Message-ID: <20250330210717.46080-10-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250330210717.46080-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20250330210717.46080-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Lad Prabhakar Simplify the high-speed clock frequency (HSFREQ) calculation by removing the redundant multiplication and division by 8. The updated equation: hsfreq = (mode->clock * bpp) / (dsi->lanes); produces the same result while improving readability and clarity. Additionally, update the comment to clarify the relationship between HS clock bit frequency, HS byte clock frequency, and HSFREQ. Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das --- drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) 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 c6f60b7f203b..746f82442c01 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -277,10 +277,10 @@ static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi, * hsclk: DSI HS Byte clock frequency (Hz) * lanes: number of data lanes * - * hsclk(bit) = hsclk(byte) * 8 + * hsclk(bit) = hsclk(byte) * 8 = hsfreq */ bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); - hsfreq = (mode->clock * bpp * 8) / (8 * dsi->lanes); + hsfreq = (mode->clock * bpp) / dsi->lanes; ret = pm_runtime_resume_and_get(dsi->dev); if (ret < 0)