Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753517AbcKYKpj (ORCPT ); Fri, 25 Nov 2016 05:45:39 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:42987 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750771AbcKYKpb (ORCPT ); Fri, 25 Nov 2016 05:45:31 -0500 From: YT Shen To: , Philipp Zabel CC: David Airlie , Matthias Brugger , YT Shen , Daniel Kurtz , Mao Huang , CK Hu , Bibby Hsieh , Daniel Vetter , Thierry Reding , Jie Qiu , Maxime Ripard , Chris Wilson , shaoming chen , Jitao Shi , Boris Brezillon , Dan Carpenter , , , , , Sascha Hauer , , Subject: [PATCH v10 12/13] drm/mediatek: update DSI sub driver flow for sending commands to panel Date: Fri, 25 Nov 2016 18:34:35 +0800 Message-ID: <1480070076-6196-13-git-send-email-yt.shen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com> References: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5410 Lines: 198 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 | 101 +++++++++++++++++++++++++++++-------- 1 file changed, 80 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index ded4202..0569f2e 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 @@ -249,7 +253,9 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi) * mipi_ratio is mipi clk coefficient for balance the pixel clk in mipi. * we set mipi_ratio is 1.05. */ - dsi->data_rate = dsi->vm.pixelclock * 3 * 21 / (1 * 1000 * 10); + dsi->data_rate = dsi->vm.pixelclock * 12 * 21; + dsi->data_rate /= (dsi->lanes * 1000 * 10); + DRM_DEBUG_DRIVER("set mipitx's data rate: %dMHz\n", dsi->data_rate); ret = clk_set_rate(dsi->hs_clk, dsi->data_rate * 1000000); if (ret < 0) { @@ -333,16 +339,23 @@ 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; @@ -480,6 +493,16 @@ 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; @@ -538,6 +561,19 @@ 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)) @@ -546,11 +582,6 @@ static void mtk_dsi_poweroff(struct mtk_dsi *dsi) if (--dsi->refcount != 0) return; - mtk_dsi_lane0_ulp_mode_enter(dsi); - mtk_dsi_clk_ulp_mode_enter(dsi); - - mtk_dsi_disable(dsi); - clk_disable_unprepare(dsi->engine_clk); clk_disable_unprepare(dsi->digital_clk); @@ -564,13 +595,6 @@ 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"); @@ -578,21 +602,43 @@ 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"); + + mtk_dsi_stop(dsi); + mtk_dsi_poweroff(dsi); + return; + } + } 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"); + + if (drm_panel_unprepare(dsi->panel)) + DRM_ERROR("failed to unprepare the panel\n"); + + mtk_dsi_stop(dsi); + mtk_dsi_poweroff(dsi); + return; + } + } + dsi->enabled = true; } @@ -608,6 +654,19 @@ static void mtk_output_dsi_disable(struct mtk_dsi *dsi) } } + 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"); + } + } + + mtk_dsi_reset_engine(dsi); + mtk_dsi_lane0_ulp_mode_enter(dsi); + mtk_dsi_clk_ulp_mode_enter(dsi); + mtk_dsi_disable(dsi); + mtk_dsi_poweroff(dsi); dsi->enabled = false; -- 1.9.1