From patchwork Thu Feb 17 21:36:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12750674 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 7D3B4C433F5 for ; Thu, 17 Feb 2022 21:36:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A532510E841; Thu, 17 Feb 2022 21:36:50 +0000 (UTC) Received: from alexa-out-sd-01.qualcomm.com (alexa-out-sd-01.qualcomm.com [199.106.114.38]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2E65310E836; Thu, 17 Feb 2022 21:36:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1645133805; x=1676669805; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=NiqWaw4HaNjiYRJGPiUkkjdsiJmyK9tmyAPD8WeeaUA=; b=bbMrrDYqCQ093Nf6KoHc3x84ppQCbd4kgHPwOHi/fQaAw4NWddxNov43 erXq6W8U58WUjPWqf/8oFFKcRastHhGWIsnXRHS4Y9Qs17MaoTEWT+u76 ukGaz6lN6Feva+lLaXcWY/6l4VT0ZEBeFScJNF7MTtYriZeKOK89XgfGd k=; Received: from unknown (HELO ironmsg01-sd.qualcomm.com) ([10.53.140.141]) by alexa-out-sd-01.qualcomm.com with ESMTP; 17 Feb 2022 13:36:44 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg01-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2022 13:36:44 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.15; Thu, 17 Feb 2022 13:36:43 -0800 Received: from khsieh-linux1.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.15; Thu, 17 Feb 2022 13:36:43 -0800 From: Kuogee Hsieh To: , , , , , , , , , Subject: [PATCH v8 3/4] drm/msm/dpu: revise timing engine programming to support widebus feature Date: Thu, 17 Feb 2022 13:36:27 -0800 Message-ID: <1645133788-5057-4-git-send-email-quic_khsieh@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1645133788-5057-1-git-send-email-quic_khsieh@quicinc.com> References: <1645133788-5057-1-git-send-email-quic_khsieh@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) 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: , Cc: quic_sbillaka@quicinc.com, linux-arm-msm@vger.kernel.org, quic_abhinavk@quicinc.com, Kuogee Hsieh , quic_aravindh@quicinc.com, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Widebus feature will transmit two pixel data per pixel clock to interface. Timing engine provides driving force for this purpose. This patch base on HPG (Hardware Programming Guide) to revise timing engine register setting to accommodate both widebus and non widebus application. Also horizontal width parameters need to be reduced by half since two pixel data are clocked out per pixel clock when widebus feature enabled. Widebus can be enabled individually at DP. However at DSI, widebus have to be enabled along with DSC to achieve pixel clock rate be scaled down with same ratio as compression ratio when 10 bits per source component. Therefore this patch add no supports of DSI related widebus and compression. Changes in v2: -- remove compression related code from timing -- remove op_info from struct msm_drm_private -- remove unnecessary wide_bus_en variables -- pass wide_bus_en into timing configuration by struct msm_dp Changes in v3: -- split patch into 3 patches Changes in v4: -- rework timing engine to not interfere with dsi/hdmi -- cover both widebus and compression Changes in v5: -- remove supports of DSI widebus and compression Changes in v7: -- split this patch into 3 patches -- add Tested-by Changes in v8: -- move new registers writes under DATA_HCTL_EN features check. Signed-off-by: Kuogee Hsieh Tested-by: Bjorn Andersson Reviewed-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 10 ++++ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 2 + .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 14 ++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 54 ++++++++++++++++------ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h | 2 + 5 files changed, 68 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 0d315b4..0c22839 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -208,6 +208,8 @@ struct dpu_encoder_virt { u32 idle_timeout; + bool wide_bus_en; + struct msm_dp *dp; }; @@ -217,6 +219,14 @@ static u32 dither_matrix[DITHER_MATRIX_SZ] = { 15, 7, 13, 5, 3, 11, 1, 9, 12, 4, 14, 6, 0, 8, 2, 10 }; + +bool dpu_encoder_is_widebus_enabled(struct drm_encoder *drm_enc) +{ + struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc); + + return dpu_enc->wide_bus_en; +} + static void _dpu_encoder_setup_dither(struct dpu_hw_pingpong *hw_pp, unsigned bpc) { struct dpu_hw_dither_cfg dither_cfg = { 0 }; diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h index 99a5d73..893d74d 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h @@ -168,4 +168,6 @@ int dpu_encoder_get_linecount(struct drm_encoder *drm_enc); */ int dpu_encoder_get_frame_count(struct drm_encoder *drm_enc); +bool dpu_encoder_is_widebus_enabled(struct drm_encoder *drm_enc); + #endif /* __DPU_ENCODER_H__ */ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c index 185379b..2af2bb7 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c @@ -110,6 +110,20 @@ static void drm_mode_to_intf_timing_params( timing->v_back_porch += timing->v_front_porch; timing->v_front_porch = 0; } + + timing->wide_bus_en = dpu_encoder_is_widebus_enabled(phys_enc->parent); + + /* + * for DP, divide the horizonal parameters by 2 when + * widebus is enabled + */ + if (phys_enc->hw_intf->cap->type == INTF_DP && timing->wide_bus_en) { + timing->width = timing->width >> 1; + timing->xres = timing->xres >> 1; + timing->h_back_porch = timing->h_back_porch >> 1; + timing->h_front_porch = timing->h_front_porch >> 1; + timing->hsync_pulse_width = timing->hsync_pulse_width >> 1; + } } static u32 get_horizontal_total(const struct intf_timing_params *timing) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c index c2cd185..4e4fa56 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c @@ -33,6 +33,7 @@ #define INTF_TP_COLOR1 0x05C #define INTF_CONFIG2 0x060 #define INTF_DISPLAY_DATA_HCTL 0x064 +#define INTF_ACTIVE_DATA_HCTL 0x068 #define INTF_FRAME_LINE_COUNT_EN 0x0A8 #define INTF_FRAME_COUNT 0x0AC #define INTF_LINE_COUNT 0x0B0 @@ -96,15 +97,23 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, u32 hsync_period, vsync_period; u32 display_v_start, display_v_end; u32 hsync_start_x, hsync_end_x; + u32 hsync_data_start_x, hsync_data_end_x; u32 active_h_start, active_h_end; u32 active_v_start, active_v_end; u32 active_hctl, display_hctl, hsync_ctl; u32 polarity_ctl, den_polarity, hsync_polarity, vsync_polarity; u32 panel_format; - u32 intf_cfg, intf_cfg2 = 0, display_data_hctl = 0; + u32 intf_cfg, intf_cfg2 = 0; + u32 display_data_hctl = 0, active_data_hctl = 0; + u32 data_width; + bool dp_intf = false; /* read interface_cfg */ intf_cfg = DPU_REG_READ(c, INTF_CONFIG); + + if (ctx->cap->type == INTF_EDP || ctx->cap->type == INTF_DP) + dp_intf = true; + hsync_period = p->hsync_pulse_width + p->h_back_porch + p->width + p->h_front_porch; vsync_period = p->vsync_pulse_width + p->v_back_porch + p->height + @@ -118,7 +127,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, hsync_start_x = p->h_back_porch + p->hsync_pulse_width; hsync_end_x = hsync_period - p->h_front_porch - 1; - if (p->width != p->xres) { + if (p->width != p->xres) { /* border fill added */ active_h_start = hsync_start_x; active_h_end = active_h_start + p->xres - 1; } else { @@ -126,7 +135,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, active_h_end = 0; } - if (p->height != p->yres) { + if (p->height != p->yres) { /* border fill added */ active_v_start = display_v_start; active_v_end = active_v_start + (p->yres * hsync_period) - 1; } else { @@ -147,17 +156,36 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, hsync_ctl = (hsync_period << 16) | p->hsync_pulse_width; display_hctl = (hsync_end_x << 16) | hsync_start_x; - if (ctx->cap->type == INTF_EDP || ctx->cap->type == INTF_DP) { + /* + * DATA_HCTL_EN controls data timing which can be different from + * video timing. It is recommended to enable it for all cases, except + * if compression is enabled in 1 pixel per clock mode + */ + if (p->wide_bus_en) + intf_cfg2 |= (INTF_CFG2_DATABUS_WIDEN | INTF_CFG2_DATA_HCTL_EN); + + data_width = p->width; + + hsync_data_start_x = hsync_start_x; + hsync_data_end_x = hsync_start_x + data_width - 1; + + display_data_hctl = (hsync_data_end_x << 16) | hsync_data_start_x; + + if (dp_intf) { + /* DP timing adjustment */ + display_v_start += p->hsync_pulse_width + p->h_back_porch; + display_v_end -= p->h_front_porch; + active_h_start = hsync_start_x; active_h_end = active_h_start + p->xres - 1; active_v_start = display_v_start; active_v_end = active_v_start + (p->yres * hsync_period) - 1; - display_v_start += p->hsync_pulse_width + p->h_back_porch; - display_v_end -= p->h_front_porch; - active_hctl = (active_h_end << 16) | active_h_start; display_hctl = active_hctl; + + intf_cfg |= INTF_CFG_ACTIVE_H_EN; + intf_cfg |= INTF_CFG_ACTIVE_V_EN; } den_polarity = 0; @@ -187,13 +215,6 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, (COLOR_8BIT << 4) | (0x21 << 8)); - if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) { - intf_cfg2 |= INTF_CFG2_DATA_HCTL_EN; - display_data_hctl = display_hctl; - DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2); - DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl); - } - DPU_REG_WRITE(c, INTF_HSYNC_CTL, hsync_ctl); DPU_REG_WRITE(c, INTF_VSYNC_PERIOD_F0, vsync_period * hsync_period); DPU_REG_WRITE(c, INTF_VSYNC_PULSE_WIDTH_F0, @@ -211,6 +232,11 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx, DPU_REG_WRITE(c, INTF_FRAME_LINE_COUNT_EN, 0x3); DPU_REG_WRITE(c, INTF_CONFIG, intf_cfg); DPU_REG_WRITE(c, INTF_PANEL_FORMAT, panel_format); + if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) { + DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2); + DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl); + DPU_REG_WRITE(c, INTF_ACTIVE_DATA_HCTL, active_data_hctl); + } } static void dpu_hw_intf_enable_timing_engine( diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h index 3568be8..e4a518a 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h @@ -30,6 +30,8 @@ struct intf_timing_params { u32 border_clr; u32 underflow_clr; u32 hsync_skew; + + bool wide_bus_en; }; struct intf_prog_fetch {