From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D983C1863 for ; Wed, 28 Dec 2022 15:36:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5EB99C433D2; Wed, 28 Dec 2022 15:36:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672241761; bh=kT2RdgshqTYBZNY+OZg4XNCVZXXwtSxQhole0gp59+E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jNMYz91WQdKs/5PW/qcONKCtVxc3cABYfimk8tm8l1NcP4ukEZ17UJCIJfylkYlDN ayvkPpZRN2Gvrza+QYcYj4O6JfbXWDFKYdu+vVlkAgipMqtlhLDe4QfEmErFj/xXDt qxNhqtlIoNHEQYsDHLuWmONBuBAnKn5m0w9nehv0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Marek Vasut , Linus Walleij , Sasha Levin Subject: [PATCH 6.1 0268/1146] drm/panel/panel-sitronix-st7701: Fix RTNI calculation Date: Wed, 28 Dec 2022 15:30:07 +0100 Message-Id: <20221228144337.416848338@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144330.180012208@linuxfoundation.org> References: <20221228144330.180012208@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Marek Vasut [ Upstream commit c1cdee9b685a174fca849e1451c201a846a69318 ] The RTNI field is multiplied by 16 and incremented by 512 before being used as the minimum number of pixel clock per horizontal line, hence it is necessary to subtract those 512 bytes from htotal and then divide the result by 16 before writing the value into the RTNI field. Fix the calculation. Fixes: de2b4917843c ("drm/panel/panel-sitronix-st7701: Infer horizontal pixel count from TFT mode") Signed-off-by: Marek Vasut Reviewed-by: Linus Walleij Link: https://patchwork.freedesktop.org/patch/msgid/20221012221159.88397-1-marex@denx.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/panel/panel-sitronix-st7701.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c index c481daa4bbce..9578f461f5e4 100644 --- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c @@ -244,7 +244,7 @@ static void st7701_init_sequence(struct st7701 *st7701) DSI_CMD2_BK0_INVSEL_ONES_MASK | FIELD_PREP(DSI_CMD2_BK0_INVSEL_NLINV_MASK, desc->nlinv), FIELD_PREP(DSI_CMD2_BK0_INVSEL_RTNI_MASK, - DIV_ROUND_UP(mode->htotal, 16))); + (clamp((u32)mode->htotal, 512U, 1008U) - 512) / 16)); /* Command2, BK1 */ ST7701_DSI(st7701, DSI_CMD2BKX_SEL, -- 2.35.1