From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0A08EC28B20 for ; Wed, 2 Apr 2025 12:17:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tXXudkKhplthvR3JvWbtHCK6cIKwDeLYV2LHDjn73oM=; b=fjHfDA6o5qzC7H shtmAfOMsbJe8F8+tpLuxjyIC5W9PHbjIhTyxu6BAEfkeqYsfxRYi6JUzpdREyFbFkb5WWyD8AW2m gGYMh6Ri3v+1G1UIdWF9np1Aw9k82oQf496hazabK94o5NEG8dL0AV3fEmkq/ddhaBauJQrLSELNb VJ8CKrGEzLZ5PmoEyGK6f2P0tG/5T1jj50UD/BrCsuWSbkC3WW9nu5QVKctWH7n+dJMCU9oXDKIvZ GxY8JjSARcAxAF5RzU6XLCMlH7BwhNJrjUA15W5wXQrg/fYBy8heSZPPiWJfa6S4xnr3dyLnXNrEU 7Bi5b7b2oHnqWvQ+74UQ==; 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charset="us-ascii"; Format="flowed" Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Hi, On 21/03/2025 16:17, Maxime Ripard wrote: > On Thu, Mar 20, 2025 at 05:59:58PM +0200, Tomi Valkeinen wrote: >> At the moment the driver just sets the clock rate with clk_set_rate(), >> and if the resulting rate is not the same as requested, prints a debug >> print, but nothing else. >> >> Add mode_fixup(), in which the clk_round_rate() is used to get the >> "rounded" rate, and set that to the adjusted_mode. >> >> In practice, with the current K3 SoCs, the display PLL is capable of >> producing very exact clocks, so most likely the rounded rate is the same >> as the original one. >> >> Signed-off-by: Tomi Valkeinen >> --- >> drivers/gpu/drm/tidss/tidss_crtc.c | 22 ++++++++++++++++++++++ >> drivers/gpu/drm/tidss/tidss_dispc.c | 6 ++++++ >> drivers/gpu/drm/tidss/tidss_dispc.h | 2 ++ >> 3 files changed, 30 insertions(+) >> >> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c >> index 1604eca265ef..b3338dac25bc 100644 >> --- a/drivers/gpu/drm/tidss/tidss_crtc.c >> +++ b/drivers/gpu/drm/tidss/tidss_crtc.c >> @@ -309,7 +309,29 @@ enum drm_mode_status tidss_crtc_mode_valid(struct drm_crtc *crtc, >> return dispc_vp_mode_valid(tidss->dispc, tcrtc->hw_videoport, mode); >> } >> >> +static bool tidss_crtc_mode_fixup(struct drm_crtc *crtc, >> + const struct drm_display_mode *mode, >> + struct drm_display_mode *adjusted_mode) >> +{ >> + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); >> + struct drm_device *ddev = crtc->dev; >> + struct tidss_device *tidss = to_tidss(ddev); >> + long rate; >> + >> + rate = dispc_vp_round_clk_rate(tidss->dispc, tcrtc->hw_videoport, >> + adjusted_mode->clock * 1000); >> + if (rate < 0) >> + return false; >> + >> + adjusted_mode->clock = rate / 1000; >> + >> + drm_mode_set_crtcinfo(adjusted_mode, 0); >> + >> + return true; >> +} > > mode_fixup is deprecated in favor of atomic_check. If you can't use it > for some reason, it should be documented one way or another. Ok. I didn't see a note about it being deprecated (just optional), so I went with fixup. Atomic check is called for every commit, and this should be only done before enabling a ctrc. I need to dig that "going-to-be-enabled" from the state. Tomi -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy