From patchwork Thu Feb 15 08:53:11 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: 13557666 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 CC2B4C48BEB for ; Thu, 15 Feb 2024 08:53:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F0EF110E38A; Thu, 15 Feb 2024 08:53:33 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="KI0fHzqx"; dkim-atps=neutral Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0345210E2E5 for ; Thu, 15 Feb 2024 08:53:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1707987204; bh=KJGpvI12Y3qPzyP0WezvIbr7vHVn+4RM9l2mBNmnuzc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KI0fHzqxebxsUKHQzrhx0j0qutnlFPpZd2PrIKSCymbb77v+tuvF6s/kbuUtpS0Os 2KL2AcQSokhEl+QjhbA2N8EaeBcY8Bhby56u8QCcTuU3f5AMy5nXjpG5rL40IEtAea qFTNkwUUqUhKsuOjQF8MwYu6n92Ahk3xQe3S9FRiM2l9FZjJRyvUJRDi0xOovpCEbY rP/2VkBV3p/bGJadS+rFfuD77kZBTmEmKWtaIXsyuwFRW1mWpbwKirJmALusUSQ/71 FGFo80krpA/VsUdiFsMMiyMKqdABCNZtnZY0lDbs3cCKZzf7XjD9i0gkfeOqP3twaD pAO82rOJnvq9g== 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 D639137820BB; Thu, 15 Feb 2024 08:53:23 +0000 (UTC) From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: fshao@chromium.org, p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, Alexandre Mergnat , CK Hu Subject: [PATCH v6 4/9] drm/mediatek: dsi: Use bitfield macros where useful Date: Thu, 15 Feb 2024 09:53:11 +0100 Message-ID: <20240215085316.56835-5-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-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Instead of open coding bitshifting for various register fields, use the bitfield macro FIELD_PREP(): this allows to enhance the human readability, decrease likeliness of mistakes (and register field overflowing) and also to simplify the code. The latter is especially seen in mtk_dsi_rxtx_control(), where it was possible to change a switch to a short for loop and to also remove the need to check for maximum DSI lanes == 4 thanks to the FIELD_PREP macro masking the value. While at it, also add the missing DA_HS_SYNC bitmask, used in mtk_dsi_phy_timconfig(). Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Signed-off-by: AngeloGioacchino Del Regno --- drivers/gpu/drm/mediatek/mtk_dsi.c | 95 ++++++++++++++++-------------- 1 file changed, 50 insertions(+), 45 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 0a83875ec1ba..a330bb94c44a 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -3,6 +3,7 @@ * Copyright (c) 2015 MediaTek Inc. */ +#include #include #include #include @@ -70,16 +71,19 @@ #define DSI_PSCTRL 0x1c #define DSI_PS_WC GENMASK(13, 0) #define DSI_PS_SEL GENMASK(17, 16) -#define PACKED_PS_16BIT_RGB565 (0 << 16) -#define PACKED_PS_18BIT_RGB666 (1 << 16) -#define LOOSELY_PS_24BIT_RGB666 (2 << 16) -#define PACKED_PS_24BIT_RGB888 (3 << 16) +#define PACKED_PS_16BIT_RGB565 0 +#define PACKED_PS_18BIT_RGB666 1 +#define LOOSELY_PS_24BIT_RGB666 2 +#define PACKED_PS_24BIT_RGB888 3 #define DSI_VSA_NL 0x20 #define DSI_VBP_NL 0x24 #define DSI_VFP_NL 0x28 #define DSI_VACT_NL 0x2C +#define VACT_NL GENMASK(14, 0) #define DSI_SIZE_CON 0x38 +#define DSI_HEIGHT GENMASK(30, 16) +#define DSI_WIDTH GENMASK(14, 0) #define DSI_HSA_WC 0x50 #define DSI_HBP_WC 0x54 #define DSI_HFP_WC 0x58 @@ -122,6 +126,7 @@ #define DSI_PHY_TIMECON2 0x118 #define CONT_DET GENMASK(7, 0) +#define DA_HS_SYNC GENMASK(15, 8) #define CLK_ZERO GENMASK(23, 16) #define CLK_TRAIL GENMASK(31, 24) @@ -253,14 +258,23 @@ static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi) timing->clk_hs_zero = timing->clk_hs_trail * 4; timing->clk_hs_exit = 2 * timing->clk_hs_trail; - timcon0 = timing->lpx | timing->da_hs_prepare << 8 | - timing->da_hs_zero << 16 | timing->da_hs_trail << 24; - timcon1 = timing->ta_go | timing->ta_sure << 8 | - timing->ta_get << 16 | timing->da_hs_exit << 24; - timcon2 = 1 << 8 | timing->clk_hs_zero << 16 | - timing->clk_hs_trail << 24; - timcon3 = timing->clk_hs_prepare | timing->clk_hs_post << 8 | - timing->clk_hs_exit << 16; + timcon0 = FIELD_PREP(LPX, timing->lpx) | + FIELD_PREP(HS_PREP, timing->da_hs_prepare) | + FIELD_PREP(HS_ZERO, timing->da_hs_zero) | + FIELD_PREP(HS_TRAIL, timing->da_hs_trail); + + timcon1 = FIELD_PREP(TA_GO, timing->ta_go) | + FIELD_PREP(TA_SURE, timing->ta_sure) | + FIELD_PREP(TA_GET, timing->ta_get) | + FIELD_PREP(DA_HS_EXIT, timing->da_hs_exit); + + timcon2 = FIELD_PREP(DA_HS_SYNC, 1) | + FIELD_PREP(CLK_ZERO, timing->clk_hs_zero) | + FIELD_PREP(CLK_TRAIL, timing->clk_hs_trail); + + timcon3 = FIELD_PREP(CLK_HS_PREP, timing->clk_hs_prepare) | + FIELD_PREP(CLK_HS_POST, timing->clk_hs_post) | + FIELD_PREP(CLK_HS_EXIT, timing->clk_hs_exit); writel(timcon0, dsi->regs + DSI_PHY_TIMECON0); writel(timcon1, dsi->regs + DSI_PHY_TIMECON1); @@ -353,71 +367,61 @@ static void mtk_dsi_set_vm_cmd(struct mtk_dsi *dsi) static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi) { - u32 tmp_reg; + u32 regval, tmp_reg = 0; + u8 i; - switch (dsi->lanes) { - case 1: - tmp_reg = 1 << 2; - break; - case 2: - tmp_reg = 3 << 2; - break; - case 3: - tmp_reg = 7 << 2; - break; - case 4: - tmp_reg = 0xf << 2; - break; - default: - tmp_reg = 0xf << 2; - break; - } + /* Number of DSI lanes (max 4 lanes), each bit enables one DSI lane. */ + for (i = 0; i < dsi->lanes; i++) + tmp_reg |= BIT(i); + + regval = FIELD_PREP(LANE_NUM, tmp_reg); if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) - tmp_reg |= HSTX_CKLP_EN; + regval |= HSTX_CKLP_EN; if (dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET) - tmp_reg |= DIS_EOT; + regval |= DIS_EOT; - writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL); + writel(regval, dsi->regs + DSI_TXRX_CTRL); } static void mtk_dsi_ps_control(struct mtk_dsi *dsi, bool config_vact) { - struct videomode *vm = &dsi->vm; - u32 dsi_buf_bpp, ps_wc; - u32 ps_bpp_mode; + u32 dsi_buf_bpp, ps_val, ps_wc, vact_nl; if (dsi->format == MIPI_DSI_FMT_RGB565) dsi_buf_bpp = 2; else dsi_buf_bpp = 3; - ps_wc = vm->hactive * dsi_buf_bpp; - ps_bpp_mode = ps_wc; + /* Word count */ + ps_wc = FIELD_PREP(DSI_PS_WC, dsi->vm.hactive * dsi_buf_bpp); + ps_val = ps_wc; + /* Pixel Stream type */ switch (dsi->format) { default: fallthrough; case MIPI_DSI_FMT_RGB888: - ps_bpp_mode |= PACKED_PS_24BIT_RGB888; + ps_val |= FIELD_PREP(DSI_PS_SEL, PACKED_PS_24BIT_RGB888); break; case MIPI_DSI_FMT_RGB666: - ps_bpp_mode |= LOOSELY_PS_24BIT_RGB666; + ps_val |= FIELD_PREP(DSI_PS_SEL, LOOSELY_PS_24BIT_RGB666); break; case MIPI_DSI_FMT_RGB666_PACKED: - ps_bpp_mode |= PACKED_PS_18BIT_RGB666; + ps_val |= FIELD_PREP(DSI_PS_SEL, PACKED_PS_18BIT_RGB666); break; case MIPI_DSI_FMT_RGB565: - ps_bpp_mode |= PACKED_PS_16BIT_RGB565; + ps_val |= FIELD_PREP(DSI_PS_SEL, PACKED_PS_16BIT_RGB565); break; } if (config_vact) { - writel(vm->vactive, dsi->regs + DSI_VACT_NL); + vact_nl = FIELD_PREP(VACT_NL, dsi->vm.vactive); + writel(vact_nl, dsi->regs + DSI_VACT_NL); writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC); } - writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL); + writel(ps_val, dsi->regs + DSI_PSCTRL); } static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi) @@ -444,7 +448,8 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi) writel(vm->vactive, dsi->regs + DSI_VACT_NL); if (dsi->driver_data->has_size_ctl) - writel(vm->vactive << 16 | vm->hactive, + writel(FIELD_PREP(DSI_HEIGHT, vm->vactive) | + FIELD_PREP(DSI_WIDTH, vm->hactive), dsi->regs + DSI_SIZE_CON); horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);