From patchwork Thu Feb 15 08:53:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 13557673 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 1D907C48BEB for ; Thu, 15 Feb 2024 08:53:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3unjGpWrY6QN9l4sHyUVQfJLEVAbQi2p+dDnCWmYLCo=; b=lPotNv9L8Piu8q 7yKHFzUEnuEa/w7B1uoxnIdWwQN42gum3eTyYiwlNlFtl6HF3axkj/HQ2/oTBn6uwY6DQ8TNG6x6C sT8bQ9YPSBMSyhgUr3hs3smCY0deAENRQ8qz/mnyHORzpZ8d/bPURYEyOppMsdxjVe/M2FDK5AtBH hRJyRjdRrL5EL+zqpYhfrQrhS1mLQPoRvqLo4KHUPLRnxMcTxWAlOFfSztjHDKmRJ2ctQxgERcusx Rm/B0fd8I6jGE6j8maPSYTEv3DeudKH3fWzr2e6zGpXZcKmgkrNGxZlc5wbpQR8HXtpynKazAXu7I +0lmN9fEMlQDYt5lp9iw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raXUt-0000000FOye-2AWG; Thu, 15 Feb 2024 08:53:35 +0000 Received: from madrid.collaboradmins.com ([46.235.227.194]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raXUh-0000000FOpQ-2Vrl; Thu, 15 Feb 2024 08:53:24 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707987202; bh=XSolIgr5FDe9KoB4OQ4H+QA/Yd/l3BaoCY5DEBJY/mo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zUMmTfvrYQcZ9VONv9rJXbrs31nlTcd98KlWPcu4JdrTAbIBz/fcsDmwYDaMjSay5 nHld9nvDO7M9ODtd5MnnPsIlMnTEFCMhAAiU22suAbeh6+HnQqMiKH17VzZrbNmF7x pddKrrB6+7W57B+m6CQc8RDKFJM2YKOzFsPOHzBNSp6kiiHPuphOzmrHJB04pD+SGN urJuskKU/aTm0FBXwvd0Q3g3OgJDXoEU/1ps36BJOIAr6vqxyqRfqPOK6M/CCLqSOI D/iUGSbjUce2xrVZ4wC2/06VrQRh71VmrNsP+JvhefM1zpDkbdKxxdodoEFeeD9yPR ieQL1Wvid7YEA== Received: from IcarusMOD.eternityproject.eu (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 5670D37820B1; Thu, 15 Feb 2024 08:53:21 +0000 (UTC) From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Subject: [PATCH v6 2/9] drm/mediatek: dsi: Fix DSI RGB666 formats and definitions Date: Thu, 15 Feb 2024 09:53:09 +0100 Message-ID: <20240215085316.56835-3-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240215085316.56835-1-angelogioacchino.delregno@collabora.com> References: <20240215085316.56835-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_005323_791087_137A03F0 X-CRM114-Status: GOOD ( 12.98 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: p.zabel@pengutronix.de, Alexandre Mergnat , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, CK Hu , linux-mediatek@lists.infradead.org, daniel@ffwll.ch, matthias.bgg@gmail.com, kernel@collabora.com, airlied@gmail.com, linux-arm-kernel@lists.infradead.org, angelogioacchino.delregno@collabora.com Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org The register bits definitions for RGB666 formats are wrong in multiple ways: first, in the DSI_PS_SEL bits region, the Packed 18-bits RGB666 format is selected with bit 1, while the Loosely Packed one is bit 2, and second - the definition name "LOOSELY_PS_18BIT_RGB666" is wrong because the loosely packed format is 24 bits instead! Either way, functions mtk_dsi_ps_control_vact() and mtk_dsi_ps_control() do not even agree on the DSI_PS_SEL bit to set in DSI_PSCTRL: one sets loosely packed (24) on RGB666, the other sets packed (18), and the other way around for RGB666_PACKED. Fixing this entire stack of issues is done in one go: - Use the correct bit for the Loosely Packed RGB666 definition - Rename LOOSELY_PS_18BIT_RGB666 to LOOSELY_PS_24BIT_RGB666 - Change ps_bpp_mode in mtk_dsi_ps_control_vact() to set: - Loosely Packed, 24-bits for MIPI_DSI_FMT_RGB666 - Packed, 18-bits for MIPI_DSI_FMT_RGB666_PACKED Fixes: 2e54c14e310f ("drm/mediatek: Add DSI sub driver") Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Signed-off-by: AngeloGioacchino Del Regno --- drivers/gpu/drm/mediatek/mtk_dsi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index c66e18006070..8af0afbe9e3d 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -71,8 +71,8 @@ #define DSI_PS_WC GENMASK(13, 0) #define DSI_PS_SEL GENMASK(17, 16) #define PACKED_PS_16BIT_RGB565 (0 << 16) -#define LOOSELY_PS_18BIT_RGB666 (1 << 16) -#define PACKED_PS_18BIT_RGB666 (2 << 16) +#define PACKED_PS_18BIT_RGB666 (1 << 16) +#define LOOSELY_PS_24BIT_RGB666 (2 << 16) #define PACKED_PS_24BIT_RGB888 (3 << 16) #define DSI_VSA_NL 0x20 @@ -370,10 +370,10 @@ static void mtk_dsi_ps_control_vact(struct mtk_dsi *dsi) ps_bpp_mode |= PACKED_PS_24BIT_RGB888; break; case MIPI_DSI_FMT_RGB666: - ps_bpp_mode |= PACKED_PS_18BIT_RGB666; + ps_bpp_mode |= LOOSELY_PS_24BIT_RGB666; break; case MIPI_DSI_FMT_RGB666_PACKED: - ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666; + ps_bpp_mode |= PACKED_PS_18BIT_RGB666; break; case MIPI_DSI_FMT_RGB565: ps_bpp_mode |= PACKED_PS_16BIT_RGB565; @@ -427,7 +427,7 @@ static void mtk_dsi_ps_control(struct mtk_dsi *dsi) dsi_tmp_buf_bpp = 3; break; case MIPI_DSI_FMT_RGB666: - tmp_reg = LOOSELY_PS_18BIT_RGB666; + tmp_reg = LOOSELY_PS_24BIT_RGB666; dsi_tmp_buf_bpp = 3; break; case MIPI_DSI_FMT_RGB666_PACKED: