From patchwork Tue Nov 22 16:54:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jyri Sarha X-Patchwork-Id: 9441583 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 473D860237 for ; Tue, 22 Nov 2016 16:55:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 39A272857D for ; Tue, 22 Nov 2016 16:55:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2E57228580; Tue, 22 Nov 2016 16:55:07 +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 autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9B5BE2857D for ; Tue, 22 Nov 2016 16:55:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DFE576E5D8; Tue, 22 Nov 2016 16:54:59 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from fllnx210.ext.ti.com (fllnx210.ext.ti.com [198.47.19.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id C72356E5D7 for ; Tue, 22 Nov 2016 16:54:32 +0000 (UTC) Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by fllnx210.ext.ti.com (8.15.1/8.15.1) with ESMTP id uAMGsSa1022299; Tue, 22 Nov 2016 10:54:28 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id uAMGsSLC004402; Tue, 22 Nov 2016 10:54:28 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.294.0; Tue, 22 Nov 2016 10:54:28 -0600 Received: from jadmar.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id uAMGsCs7027448; Tue, 22 Nov 2016 10:54:26 -0600 From: Jyri Sarha To: Subject: [PATCH v3 06/11] drm/tilcdc: Enable palette loading for revision 2 LCDC too Date: Tue, 22 Nov 2016 18:54:05 +0200 Message-ID: X-Mailer: git-send-email 1.9.1 In-Reply-To: References: MIME-Version: 1.0 Cc: khilman@baylibre.com, Jyri Sarha , bgolaszewski@baylibre.com, tomi.valkeinen@ti.com, laurent.pinchart@ideasonboard.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 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" X-Virus-Scanned: ClamAV using ClamSMTP The LCDC revision 2 documentation also mentions the mandatory palette for true color modes. Even if the rev 2 LCDC appears to work just fine without the palette being loaded loading it helps in testing the feature. Signed-off-by: Jyri Sarha --- drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 85 +++++++++++++++++------------------- 1 file changed, 41 insertions(+), 44 deletions(-) diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c index 0f89422..3bdab77 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c @@ -28,8 +28,8 @@ #include "tilcdc_regs.h" #define TILCDC_VBLANK_SAFETY_THRESHOLD_US 1000 -#define TILCDC_REV1_PALETTE_SIZE 32 -#define TILCDC_REV1_PALETTE_FIRST_ENTRY 0x4000 +#define TILCDC_PALETTE_SIZE 32 +#define TILCDC_PALETTE_FIRST_ENTRY 0x4000 struct tilcdc_crtc { struct drm_crtc base; @@ -62,7 +62,7 @@ struct tilcdc_crtc { struct work_struct recover_work; dma_addr_t palette_dma_handle; - void *palette_base; + u16 *palette_base; struct completion palette_loaded; }; #define to_tilcdc_crtc(x) container_of(x, struct tilcdc_crtc, base) @@ -114,23 +114,17 @@ static void set_scanout(struct drm_crtc *crtc, struct drm_framebuffer *fb) } /* - * The driver currently only supports the RGB565 format for revision 1. For - * 16 bits-per-pixel the palette block is bypassed, but the first 32 bytes of - * the framebuffer are still considered palette. The first 16-bit entry must - * be 0x4000 while all other entries must be zeroed. + * The driver currently only supports only true color formats. For + * true color the palette block is bypassed, but a 32 byte palette + * should still be loaded. The first 16-bit entry must be 0x4000 while + * all other entries must be zeroed. */ static void tilcdc_crtc_load_palette(struct drm_crtc *crtc) { u32 dma_fb_base, dma_fb_ceiling, raster_ctl; - struct tilcdc_crtc *tilcdc_crtc; - struct drm_device *dev; - u16 *first_entry; - - dev = crtc->dev; - tilcdc_crtc = to_tilcdc_crtc(crtc); - first_entry = tilcdc_crtc->palette_base; - - *first_entry = TILCDC_REV1_PALETTE_FIRST_ENTRY; + struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); + struct drm_device *dev = crtc->dev; + struct tilcdc_drm_private *priv = dev->dev_private; dma_fb_base = tilcdc_read(dev, LCDC_DMA_FB_BASE_ADDR_0_REG); dma_fb_ceiling = tilcdc_read(dev, LCDC_DMA_FB_CEILING_ADDR_0_REG); @@ -140,23 +134,34 @@ static void tilcdc_crtc_load_palette(struct drm_crtc *crtc) tilcdc_write(dev, LCDC_DMA_FB_BASE_ADDR_0_REG, tilcdc_crtc->palette_dma_handle); tilcdc_write(dev, LCDC_DMA_FB_CEILING_ADDR_0_REG, - (u32)tilcdc_crtc->palette_dma_handle - + TILCDC_REV1_PALETTE_SIZE - 1); + (u32) tilcdc_crtc->palette_dma_handle + + TILCDC_PALETTE_SIZE - 1); - /* Load it. */ - tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, - LCDC_PALETTE_LOAD_MODE(DATA_ONLY)); - tilcdc_set(dev, LCDC_RASTER_CTRL_REG, - LCDC_PALETTE_LOAD_MODE(PALETTE_ONLY)); + /* Set dma load mode for palette loading only. */ + tilcdc_write_mask(dev, LCDC_RASTER_CTRL_REG, + LCDC_PALETTE_LOAD_MODE(PALETTE_ONLY), + LCDC_PALETTE_LOAD_MODE_MASK); + + /* Enable DMA Palette Loaded Interrupt */ + if (priv->rev == 1) + tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA); + else + tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG, LCDC_V2_PL_INT_ENA); - /* Enable the LCDC and wait for palette to be loaded. */ - tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA); + /* Enable LCDC DMA and wait for palette to be loaded. */ + tilcdc_clear_irqstatus(dev, 0xffffffff); tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE); wait_for_completion(&tilcdc_crtc->palette_loaded); - /* Restore the registers. */ + /* Disable LCDC DMA and DMA Palette Loaded Interrupt. */ tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE); + if (priv->rev == 1) + tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA); + else + tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, LCDC_V2_PL_INT_ENA); + + /* Restore the registers. */ tilcdc_write(dev, LCDC_DMA_FB_BASE_ADDR_0_REG, dma_fb_base); tilcdc_write(dev, LCDC_DMA_FB_CEILING_ADDR_0_REG, dma_fb_ceiling); tilcdc_write(dev, LCDC_RASTER_CTRL_REG, raster_ctl); @@ -217,7 +222,6 @@ static void tilcdc_crtc_enable(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); - struct tilcdc_drm_private *priv = dev->dev_private; WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); mutex_lock(&tilcdc_crtc->enable_lock); @@ -230,7 +234,7 @@ static void tilcdc_crtc_enable(struct drm_crtc *crtc) reset(crtc); - if (priv->rev == 1 && !completion_done(&tilcdc_crtc->palette_loaded)) + if (!completion_done(&tilcdc_crtc->palette_loaded)) tilcdc_crtc_load_palette(crtc); tilcdc_crtc_enable_irqs(dev); @@ -280,8 +284,7 @@ static void tilcdc_crtc_off(struct drm_crtc *crtc, bool shutdown) * LCDC will not retain the palette when reset. Make sure it gets * reloaded on tilcdc_crtc_enable(). */ - if (priv->rev == 1) - reinit_completion(&tilcdc_crtc->palette_loaded); + reinit_completion(&tilcdc_crtc->palette_loaded); drm_crtc_vblank_off(crtc); @@ -916,13 +919,8 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc) dev_err_ratelimited(dev->dev, "%s(0x%08x): FIFO underflow", __func__, stat); - if (priv->rev == 1) { - if (stat & LCDC_PL_LOAD_DONE) { - complete(&tilcdc_crtc->palette_loaded); - tilcdc_clear(dev, - LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA); - } - } + if (stat & LCDC_PL_LOAD_DONE) + complete(&tilcdc_crtc->palette_loaded); if (stat & LCDC_SYNC_LOST) { dev_err_ratelimited(dev->dev, "%s(0x%08x): Sync lost", @@ -968,15 +966,14 @@ int tilcdc_crtc_create(struct drm_device *dev) return -ENOMEM; } - if (priv->rev == 1) { - init_completion(&tilcdc_crtc->palette_loaded); - tilcdc_crtc->palette_base = dmam_alloc_coherent(dev->dev, - TILCDC_REV1_PALETTE_SIZE, + init_completion(&tilcdc_crtc->palette_loaded); + tilcdc_crtc->palette_base = dmam_alloc_coherent(dev->dev, + TILCDC_PALETTE_SIZE, &tilcdc_crtc->palette_dma_handle, GFP_KERNEL | __GFP_ZERO); - if (!tilcdc_crtc->palette_base) - return -ENOMEM; - } + if (!tilcdc_crtc->palette_base) + return -ENOMEM; + *tilcdc_crtc->palette_base = TILCDC_PALETTE_FIRST_ENTRY; crtc = &tilcdc_crtc->base;