From patchwork Wed Jan 11 06:51:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: YT Shen X-Patchwork-Id: 9509433 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C02A460231 for ; Wed, 11 Jan 2017 06:54:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B2454285D2 for ; Wed, 11 Jan 2017 06:54:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6B66285E4; Wed, 11 Jan 2017 06:54:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 58483285D2 for ; Wed, 11 Jan 2017 06:54:44 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cRCnz-0003an-Kv; Wed, 11 Jan 2017 06:54:43 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cRCnt-0003V2-SS; Wed, 11 Jan 2017 06:54:40 +0000 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1356916619; Wed, 11 Jan 2017 14:54:05 +0800 Received: from mtkslt301.mediatek.inc (10.21.14.114) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Wed, 11 Jan 2017 14:54:03 +0800 From: YT Shen To: , Philipp Zabel , CK Hu Subject: [PATCH v11 11/12] drm/mediatek: update DSI sub driver flow for sending commands to panel Date: Wed, 11 Jan 2017 14:51:12 +0800 Message-ID: <1484117473-46644-12-git-send-email-yt.shen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1484117473-46644-1-git-send-email-yt.shen@mediatek.com> References: <1484117473-46644-1-git-send-email-yt.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170110_225439_107771_A6993A75 X-CRM114-Status: GOOD ( 14.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, srv_heupstream@mediatek.com, David Airlie , thierry.reding@gmail.com, emil.l.velikov@gmail.com, linux-kernel@vger.kernel.org, Daniel Kurtz , YT Shen , Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , yingjoe.chen@mediatek.com, shaoming chen , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch update enable/disable flow of DSI module. Original flow works on there is a bridge chip: DSI -> bridge -> panel. In this case: DSI -> panel, the DSI sub driver flow should be updated. We need to initialize DSI first so that we can send commands to panel. Signed-off-by: shaoming chen Signed-off-by: YT Shen --- drivers/gpu/drm/mediatek/mtk_dsi.c | 89 +++++++++++++++++++++++++++++++------- 1 file changed, 74 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 85f22d2..21392c4 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -126,6 +126,10 @@ #define CLK_HS_POST (0xff << 8) #define CLK_HS_EXIT (0xff << 16) +#define DSI_VM_CMD_CON 0x130 +#define VM_CMD_EN BIT(0) +#define TS_VFP_EN BIT(5) + #define DSI_CMDQ0 0x180 #define CONFIG (0xff << 0) #define SHORT_PACKET 0 @@ -365,16 +369,23 @@ static void mtk_dsi_set_mode(struct mtk_dsi *dsi) u32 vid_mode = CMD_MODE; if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { - vid_mode = SYNC_PULSE_MODE; - - if ((dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) && - !(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)) + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) vid_mode = BURST_MODE; + else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) + vid_mode = SYNC_PULSE_MODE; + else + vid_mode = SYNC_EVENT_MODE; } writel(vid_mode, dsi->regs + DSI_MODE_CTRL); } +static void mtk_dsi_set_vm_cmd(struct mtk_dsi *dsi) +{ + mtk_dsi_mask(dsi, DSI_VM_CMD_CON, VM_CMD_EN, VM_CMD_EN); + mtk_dsi_mask(dsi, DSI_VM_CMD_CON, TS_VFP_EN, TS_VFP_EN); +} + static void mtk_dsi_ps_control_vact(struct mtk_dsi *dsi) { struct videomode *vm = &dsi->vm; @@ -512,6 +523,16 @@ static void mtk_dsi_start(struct mtk_dsi *dsi) writel(1, dsi->regs + DSI_START); } +static void mtk_dsi_stop(struct mtk_dsi *dsi) +{ + writel(0, dsi->regs + DSI_START); +} + +static void mtk_dsi_set_cmd_mode(struct mtk_dsi *dsi) +{ + writel(CMD_MODE, dsi->regs + DSI_MODE_CTRL); +} + static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi) { u32 inten = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG; @@ -570,6 +591,19 @@ static irqreturn_t mtk_dsi_irq(int irq, void *dev_id) return IRQ_HANDLED; } +static s32 mtk_dsi_switch_to_cmd_mode(struct mtk_dsi *dsi, u8 irq_flag, u32 t) +{ + mtk_dsi_irq_data_clear(dsi, irq_flag); + mtk_dsi_set_cmd_mode(dsi); + + if (!mtk_dsi_wait_for_irq_done(dsi, irq_flag, t)) { + DRM_ERROR("failed to switch cmd mode\n"); + return -ETIME; + } else { + return 0; + } +} + static void mtk_dsi_poweroff(struct mtk_dsi *dsi) { if (WARN_ON(dsi->refcount == 0)) @@ -578,6 +612,17 @@ static void mtk_dsi_poweroff(struct mtk_dsi *dsi) if (--dsi->refcount != 0) return; + mtk_dsi_stop(dsi); + if (!mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500)) { + if (dsi->panel) { + if (drm_panel_unprepare(dsi->panel)) { + DRM_ERROR("failed to unprepare the panel\n"); + return; + } + } + } + + mtk_dsi_reset_engine(dsi); mtk_dsi_lane0_ulp_mode_enter(dsi); mtk_dsi_clk_ulp_mode_enter(dsi); @@ -596,13 +641,6 @@ static void mtk_output_dsi_enable(struct mtk_dsi *dsi) if (dsi->enabled) return; - if (dsi->panel) { - if (drm_panel_prepare(dsi->panel)) { - DRM_ERROR("failed to setup the panel\n"); - return; - } - } - ret = mtk_dsi_poweron(dsi); if (ret < 0) { DRM_ERROR("failed to power on dsi\n"); @@ -610,22 +648,43 @@ static void mtk_output_dsi_enable(struct mtk_dsi *dsi) } mtk_dsi_rxtx_control(dsi); + mtk_dsi_ps_control_vact(dsi); + mtk_dsi_set_vm_cmd(dsi); + mtk_dsi_config_vdo_timing(dsi); + mtk_dsi_set_interrupt_enable(dsi); mtk_dsi_clk_ulp_mode_leave(dsi); mtk_dsi_lane0_ulp_mode_leave(dsi); mtk_dsi_clk_hs_mode(dsi, 0); - mtk_dsi_set_mode(dsi); - mtk_dsi_ps_control_vact(dsi); - mtk_dsi_config_vdo_timing(dsi); - mtk_dsi_set_interrupt_enable(dsi); + if (dsi->panel) { + if (drm_panel_prepare(dsi->panel)) { + DRM_ERROR("failed to prepare the panel\n"); + goto err_dsi_power_off; + } + } mtk_dsi_set_mode(dsi); mtk_dsi_clk_hs_mode(dsi, 1); mtk_dsi_start(dsi); + if (dsi->panel) { + if (drm_panel_enable(dsi->panel)) { + DRM_ERROR("failed to enable the panel\n"); + goto err_panel_disable; + } + } + dsi->enabled = true; + + return; +err_panel_disable: + mtk_dsi_stop(dsi); + if (dsi->panel) + drm_panel_unprepare(dsi->panel); +err_dsi_power_off: + mtk_dsi_poweroff(dsi); } static void mtk_output_dsi_disable(struct mtk_dsi *dsi)