From 0425a20f8a49722d0508e917b4aef767bbc06ec8 Mon Sep 17 00:00:00 2001 From: Lad Prabhakar Date: Mon, 9 Jun 2025 23:56:23 +0100 Subject: [PATCH] drm: renesas: rz-du: mipi_dsi: Simplify HSFREQ calculation 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 Reviewed-by: Laurent Pinchart Signed-off-by: Biju Das Link: https://lore.kernel.org/r/20250609225630.502888-3-prabhakar.mahadev-lad.rj@bp.renesas.com --- 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 70f36258db634..7fa5bb2a62b64 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -288,10 +288,10 @@ 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) -- 2.47.2