diff options
Diffstat (limited to 'drivers/gpu/drm/pl111')
-rw-r--r-- | drivers/gpu/drm/pl111/pl111_display.c | 115 | ||||
-rw-r--r-- | drivers/gpu/drm/pl111/pl111_drm.h | 13 | ||||
-rw-r--r-- | drivers/gpu/drm/pl111/pl111_drv.c | 143 | ||||
-rw-r--r-- | drivers/gpu/drm/pl111/pl111_versatile.c | 118 |
4 files changed, 306 insertions, 83 deletions
diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c index 06c4bf756b69..310646427907 100644 --- a/drivers/gpu/drm/pl111/pl111_display.c +++ b/drivers/gpu/drm/pl111/pl111_display.c @@ -50,6 +50,41 @@ irqreturn_t pl111_irq(int irq, void *data) return status; } +static enum drm_mode_status +pl111_mode_valid(struct drm_crtc *crtc, + const struct drm_display_mode *mode) +{ + struct drm_device *drm = crtc->dev; + struct pl111_drm_dev_private *priv = drm->dev_private; + u32 cpp = priv->variant->fb_bpp / 8; + u64 bw; + + /* + * We use the pixelclock to also account for interlaced modes, the + * resulting bandwidth is in bytes per second. + */ + bw = mode->clock * 1000; /* In Hz */ + bw = bw * mode->hdisplay * mode->vdisplay * cpp; + bw = div_u64(bw, mode->htotal * mode->vtotal); + + /* + * If no bandwidth constraints, anything goes, else + * check if we are too fast. + */ + if (priv->memory_bw && (bw > priv->memory_bw)) { + DRM_DEBUG_KMS("%d x %d @ %d Hz, %d cpp, bw %llu too fast\n", + mode->hdisplay, mode->vdisplay, + mode->clock * 1000, cpp, bw); + + return MODE_BAD; + } + DRM_DEBUG_KMS("%d x %d @ %d Hz, %d cpp, bw %llu bytes/s OK\n", + mode->hdisplay, mode->vdisplay, + mode->clock * 1000, cpp, bw); + + return MODE_OK; +} + static int pl111_display_check(struct drm_simple_display_pipe *pipe, struct drm_plane_state *pstate, struct drm_crtc_state *cstate) @@ -94,6 +129,7 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, const struct drm_display_mode *mode = &cstate->mode; struct drm_framebuffer *fb = plane->state->fb; struct drm_connector *connector = priv->connector; + struct drm_bridge *bridge = priv->bridge; u32 cntl; u32 ppl, hsw, hfp, hbp; u32 lpp, vsw, vfp, vbp; @@ -137,17 +173,46 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, tim2 = readl(priv->regs + CLCD_TIM2); tim2 &= (TIM2_BCD | TIM2_PCD_LO_MASK | TIM2_PCD_HI_MASK); + if (priv->variant->broken_clockdivider) + tim2 |= TIM2_BCD; + if (mode->flags & DRM_MODE_FLAG_NHSYNC) tim2 |= TIM2_IHS; if (mode->flags & DRM_MODE_FLAG_NVSYNC) tim2 |= TIM2_IVS; - if (connector->display_info.bus_flags & DRM_BUS_FLAG_DE_LOW) - tim2 |= TIM2_IOE; + if (connector) { + if (connector->display_info.bus_flags & DRM_BUS_FLAG_DE_LOW) + tim2 |= TIM2_IOE; + + if (connector->display_info.bus_flags & + DRM_BUS_FLAG_PIXDATA_NEGEDGE) + tim2 |= TIM2_IPC; + } - if (connector->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE) - tim2 |= TIM2_IPC; + if (bridge) { + const struct drm_bridge_timings *btimings = bridge->timings; + + /* + * Here is when things get really fun. Sometimes the bridge + * timings are such that the signal out from PL11x is not + * stable before the receiving bridge (such as a dumb VGA DAC + * or similar) samples it. If that happens, we compensate by + * the only method we have: output the data on the opposite + * edge of the clock so it is for sure stable when it gets + * sampled. + * + * The PL111 manual does not contain proper timining diagrams + * or data for these details, but we know from experiments + * that the setup time is more than 3000 picoseconds (3 ns). + * If we have a bridge that requires the signal to be stable + * earlier than 3000 ps before the clock pulse, we have to + * output the data on the opposite edge to avoid flicker. + */ + if (btimings && btimings->setup_time_ps >= 3000) + tim2 ^= TIM2_IPC; + } tim2 |= cpl << 16; writel(tim2, priv->regs + CLCD_TIM2); @@ -172,10 +237,17 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, cntl |= CNTL_LCDBPP24 | CNTL_BGR; break; case DRM_FORMAT_BGR565: - cntl |= CNTL_LCDBPP16_565; + if (priv->variant->is_pl110) + cntl |= CNTL_LCDBPP16; + else + cntl |= CNTL_LCDBPP16_565; break; case DRM_FORMAT_RGB565: - cntl |= CNTL_LCDBPP16_565 | CNTL_BGR; + if (priv->variant->is_pl110) + cntl |= CNTL_LCDBPP16; + else + cntl |= CNTL_LCDBPP16_565; + cntl |= CNTL_BGR; break; case DRM_FORMAT_ABGR1555: case DRM_FORMAT_XBGR1555: @@ -199,6 +271,10 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, break; } + /* The PL110 in Integrator/Versatile does the BGR routing externally */ + if (priv->variant->external_bgr) + cntl &= ~CNTL_BGR; + /* Power sequence: first enable and chill */ writel(cntl, priv->regs + priv->ctrl); @@ -215,7 +291,8 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, cntl |= CNTL_LCDPWR; writel(cntl, priv->regs + priv->ctrl); - drm_crtc_vblank_on(crtc); + if (!priv->variant->broken_vblank) + drm_crtc_vblank_on(crtc); } void pl111_display_disable(struct drm_simple_display_pipe *pipe) @@ -225,7 +302,8 @@ void pl111_display_disable(struct drm_simple_display_pipe *pipe) struct pl111_drm_dev_private *priv = drm->dev_private; u32 cntl; - drm_crtc_vblank_off(crtc); + if (!priv->variant->broken_vblank) + drm_crtc_vblank_off(crtc); /* Power Down */ cntl = readl(priv->regs + priv->ctrl); @@ -278,8 +356,10 @@ static void pl111_display_update(struct drm_simple_display_pipe *pipe, } } -int pl111_enable_vblank(struct drm_device *drm, unsigned int crtc) +static int pl111_display_enable_vblank(struct drm_simple_display_pipe *pipe) { + struct drm_crtc *crtc = &pipe->crtc; + struct drm_device *drm = crtc->dev; struct pl111_drm_dev_private *priv = drm->dev_private; writel(CLCD_IRQ_NEXTBASE_UPDATE, priv->regs + priv->ienb); @@ -287,8 +367,10 @@ int pl111_enable_vblank(struct drm_device *drm, unsigned int crtc) return 0; } -void pl111_disable_vblank(struct drm_device *drm, unsigned int crtc) +static void pl111_display_disable_vblank(struct drm_simple_display_pipe *pipe) { + struct drm_crtc *crtc = &pipe->crtc; + struct drm_device *drm = crtc->dev; struct pl111_drm_dev_private *priv = drm->dev_private; writel(0, priv->regs + priv->ienb); @@ -300,7 +382,8 @@ static int pl111_display_prepare_fb(struct drm_simple_display_pipe *pipe, return drm_gem_fb_prepare_fb(&pipe->plane, plane_state); } -static const struct drm_simple_display_pipe_funcs pl111_display_funcs = { +static struct drm_simple_display_pipe_funcs pl111_display_funcs = { + .mode_valid = pl111_mode_valid, .check = pl111_display_check, .enable = pl111_display_enable, .disable = pl111_display_disable, @@ -417,6 +500,11 @@ pl111_init_clock_divider(struct drm_device *drm) dev_err(drm->dev, "CLCD: unable to get clcdclk.\n"); return PTR_ERR(parent); } + /* If the clock divider is broken, use the parent directly */ + if (priv->variant->broken_clockdivider) { + priv->clk = parent; + return 0; + } parent_name = __clk_get_name(parent); spin_lock_init(&priv->tim2_lock); @@ -454,6 +542,11 @@ int pl111_display_init(struct drm_device *drm) if (ret) return ret; + if (!priv->variant->broken_vblank) { + pl111_display_funcs.enable_vblank = pl111_display_enable_vblank; + pl111_display_funcs.disable_vblank = pl111_display_disable_vblank; + } + ret = drm_simple_display_pipe_init(drm, &priv->pipe, &pl111_display_funcs, priv->variant->formats, diff --git a/drivers/gpu/drm/pl111/pl111_drm.h b/drivers/gpu/drm/pl111/pl111_drm.h index 07fa2cdb364a..8639b2d4ddf7 100644 --- a/drivers/gpu/drm/pl111/pl111_drm.h +++ b/drivers/gpu/drm/pl111/pl111_drm.h @@ -36,14 +36,24 @@ struct drm_minor; * struct pl111_variant_data - encodes IP differences * @name: the name of this variant * @is_pl110: this is the early PL110 variant + * @external_bgr: this is the Versatile Pl110 variant with external + * BGR/RGB routing + * @broken_clockdivider: the clock divider is broken and we need to + * use the supplied clock directly + * @broken_vblank: the vblank IRQ is broken on this variant * @formats: array of supported pixel formats on this variant * @nformats: the length of the array of supported pixel formats + * @fb_bpp: desired bits per pixel on the default framebuffer */ struct pl111_variant_data { const char *name; bool is_pl110; + bool external_bgr; + bool broken_clockdivider; + bool broken_vblank; const u32 *formats; unsigned int nformats; + unsigned int fb_bpp; }; struct pl111_drm_dev_private { @@ -55,6 +65,7 @@ struct pl111_drm_dev_private { struct drm_simple_display_pipe pipe; void *regs; + u32 memory_bw; u32 ienb; u32 ctrl; /* The pixel clock (a reference to our clock divider off of CLCDCLK). */ @@ -71,8 +82,6 @@ struct pl111_drm_dev_private { }; int pl111_display_init(struct drm_device *dev); -int pl111_enable_vblank(struct drm_device *drm, unsigned int crtc); -void pl111_disable_vblank(struct drm_device *drm, unsigned int crtc); irqreturn_t pl111_irq(int irq, void *data); int pl111_debugfs_init(struct drm_minor *minor); diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c index acb738c69873..4621259d5387 100644 --- a/drivers/gpu/drm/pl111/pl111_drv.c +++ b/drivers/gpu/drm/pl111/pl111_drv.c @@ -58,6 +58,8 @@ #include <linux/dma-buf.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_graph.h> #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> @@ -85,9 +87,13 @@ static int pl111_modeset_init(struct drm_device *dev) { struct drm_mode_config *mode_config; struct pl111_drm_dev_private *priv = dev->dev_private; - struct drm_panel *panel; - struct drm_bridge *bridge; + struct device_node *np = dev->dev->of_node; + struct device_node *remote; + struct drm_panel *panel = NULL; + struct drm_bridge *bridge = NULL; + bool defer = false; int ret = 0; + int i; drm_mode_config_init(dev); mode_config = &dev->mode_config; @@ -97,10 +103,54 @@ static int pl111_modeset_init(struct drm_device *dev) mode_config->min_height = 1; mode_config->max_height = 768; - ret = drm_of_find_panel_or_bridge(dev->dev->of_node, - 0, 0, &panel, &bridge); - if (ret && ret != -ENODEV) - return ret; + i = 0; + for_each_endpoint_of_node(np, remote) { + struct drm_panel *tmp_panel; + struct drm_bridge *tmp_bridge; + + dev_dbg(dev->dev, "checking endpoint %d\n", i); + + ret = drm_of_find_panel_or_bridge(dev->dev->of_node, + 0, i, + &tmp_panel, + &tmp_bridge); + if (ret) { + if (ret == -EPROBE_DEFER) { + /* + * Something deferred, but that is often just + * another way of saying -ENODEV, but let's + * cast a vote for later deferral. + */ + defer = true; + } else if (ret != -ENODEV) { + /* Continue, maybe something else is working */ + dev_err(dev->dev, + "endpoint %d returns %d\n", i, ret); + } + } + + if (tmp_panel) { + dev_info(dev->dev, + "found panel on endpoint %d\n", i); + panel = tmp_panel; + } + if (tmp_bridge) { + dev_info(dev->dev, + "found bridge on endpoint %d\n", i); + bridge = tmp_bridge; + } + + i++; + } + + /* + * If we can't find neither panel nor bridge on any of the + * endpoints, and any of them retured -EPROBE_DEFER, then + * let's defer this driver too. + */ + if ((!panel && !bridge) && defer) + return -EPROBE_DEFER; + if (panel) { bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_Unknown); @@ -108,11 +158,17 @@ static int pl111_modeset_init(struct drm_device *dev) ret = PTR_ERR(bridge); goto out_config; } - /* - * TODO: when we are using a different bridge than a panel - * (such as a dumb VGA connector) we need to devise a different - * method to get the connector out of the bridge. - */ + } else if (bridge) { + dev_info(dev->dev, "Using non-panel bridge\n"); + } else { + dev_err(dev->dev, "No bridge, exiting\n"); + return -ENODEV; + } + + priv->bridge = bridge; + if (panel) { + priv->panel = panel; + priv->connector = panel->connector; } ret = pl111_display_init(dev); @@ -126,19 +182,17 @@ static int pl111_modeset_init(struct drm_device *dev) if (ret) return ret; - priv->bridge = bridge; - priv->panel = panel; - priv->connector = panel->connector; - - ret = drm_vblank_init(dev, 1); - if (ret != 0) { - dev_err(dev->dev, "Failed to init vblank\n"); - goto out_bridge; + if (!priv->variant->broken_vblank) { + ret = drm_vblank_init(dev, 1); + if (ret != 0) { + dev_err(dev->dev, "Failed to init vblank\n"); + goto out_bridge; + } } drm_mode_config_reset(dev); - drm_fb_cma_fbdev_init(dev, 32, 0); + drm_fb_cma_fbdev_init(dev, priv->variant->fb_bpp, 0); drm_kms_helper_poll_init(dev); @@ -170,10 +224,6 @@ static struct drm_driver pl111_drm_driver = { .dumb_create = drm_gem_cma_dumb_create, .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, - - .enable_vblank = pl111_enable_vblank, - .disable_vblank = pl111_disable_vblank, - .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = drm_gem_prime_import, @@ -191,7 +241,7 @@ static int pl111_amba_probe(struct amba_device *amba_dev, { struct device *dev = &amba_dev->dev; struct pl111_drm_dev_private *priv; - struct pl111_variant_data *variant = id->data; + const struct pl111_variant_data *variant = id->data; struct drm_device *drm; int ret; @@ -207,27 +257,16 @@ static int pl111_amba_probe(struct amba_device *amba_dev, drm->dev_private = priv; priv->variant = variant; - /* - * The PL110 and PL111 variants have two registers - * swapped: interrupt enable and control. For this reason - * we use offsets that we can change per variant. - */ + if (of_property_read_u32(dev->of_node, "max-memory-bandwidth", + &priv->memory_bw)) { + dev_info(dev, "no max memory bandwidth specified, assume unlimited\n"); + priv->memory_bw = 0; + } + + /* The two variants swap this register */ if (variant->is_pl110) { - /* - * The ARM Versatile boards are even more special: - * their PrimeCell ID say they are PL110 but the - * control and interrupt enable registers are anyway - * swapped to the PL111 order so they are not following - * the PL110 datasheet. - */ - if (of_machine_is_compatible("arm,versatile-ab") || - of_machine_is_compatible("arm,versatile-pb")) { - priv->ienb = CLCD_PL111_IENB; - priv->ctrl = CLCD_PL111_CNTL; - } else { - priv->ienb = CLCD_PL110_IENB; - priv->ctrl = CLCD_PL110_CNTL; - } + priv->ienb = CLCD_PL110_IENB; + priv->ctrl = CLCD_PL110_CNTL; } else { priv->ienb = CLCD_PL111_IENB; priv->ctrl = CLCD_PL111_CNTL; @@ -239,6 +278,11 @@ static int pl111_amba_probe(struct amba_device *amba_dev, return PTR_ERR(priv->regs); } + /* This may override some variant settings */ + ret = pl111_versatile_init(dev, priv); + if (ret) + goto dev_unref; + /* turn off interrupts before requesting the irq */ writel(0, priv->regs + priv->ienb); @@ -249,10 +293,6 @@ static int pl111_amba_probe(struct amba_device *amba_dev, return ret; } - ret = pl111_versatile_init(dev, priv); - if (ret) - goto dev_unref; - ret = pl111_modeset_init(drm); if (ret != 0) goto dev_unref; @@ -284,8 +324,7 @@ static int pl111_amba_remove(struct amba_device *amba_dev) } /* - * This variant exist in early versions like the ARM Integrator - * and this version lacks the 565 and 444 pixel formats. + * This early variant lacks the 565 and 444 pixel formats. */ static const u32 pl110_pixel_formats[] = { DRM_FORMAT_ABGR8888, @@ -303,6 +342,7 @@ static const struct pl111_variant_data pl110_variant = { .is_pl110 = true, .formats = pl110_pixel_formats, .nformats = ARRAY_SIZE(pl110_pixel_formats), + .fb_bpp = 16, }; /* RealView, Versatile Express etc use this modern variant */ @@ -327,6 +367,7 @@ static const struct pl111_variant_data pl111_variant = { .name = "PL111", .formats = pl111_pixel_formats, .nformats = ARRAY_SIZE(pl111_pixel_formats), + .fb_bpp = 32, }; static const struct amba_id pl111_id_table[] = { diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c index 97d4af6925a3..9302f516045e 100644 --- a/drivers/gpu/drm/pl111/pl111_versatile.c +++ b/drivers/gpu/drm/pl111/pl111_versatile.c @@ -1,3 +1,4 @@ +#include <linux/amba/clcd-regs.h> #include <linux/device.h> #include <linux/of.h> #include <linux/regmap.h> @@ -64,10 +65,8 @@ static const struct of_device_id versatile_clcd_of_match[] = { #define INTEGRATOR_CLCD_LCDBIASEN BIT(8) #define INTEGRATOR_CLCD_LCDBIASUP BIT(9) #define INTEGRATOR_CLCD_LCDBIASDN BIT(10) -/* Bits 11,12,13 controls the LCD type */ -#define INTEGRATOR_CLCD_LCDMUX_MASK (BIT(11)|BIT(12)|BIT(13)) +/* Bits 11,12,13 controls the LCD or VGA bridge type */ #define INTEGRATOR_CLCD_LCDMUX_LCD24 BIT(11) -#define INTEGRATOR_CLCD_LCDMUX_VGA565 BIT(12) #define INTEGRATOR_CLCD_LCDMUX_SHARP (BIT(11)|BIT(12)) #define INTEGRATOR_CLCD_LCDMUX_VGA555 BIT(13) #define INTEGRATOR_CLCD_LCDMUX_VGA24 (BIT(11)|BIT(12)|BIT(13)) @@ -82,16 +81,7 @@ static const struct of_device_id versatile_clcd_of_match[] = { /* 0 = 24bit VGA, 1 = 18bit VGA */ #define INTEGRATOR_CLCD_LCD_N24BITEN BIT(19) -#define INTEGRATOR_CLCD_MASK (INTEGRATOR_CLCD_LCDBIASEN | \ - INTEGRATOR_CLCD_LCDBIASUP | \ - INTEGRATOR_CLCD_LCDBIASDN | \ - INTEGRATOR_CLCD_LCDMUX_MASK | \ - INTEGRATOR_CLCD_LCD0_EN | \ - INTEGRATOR_CLCD_LCD1_EN | \ - INTEGRATOR_CLCD_LCD_STATIC1 | \ - INTEGRATOR_CLCD_LCD_STATIC2 | \ - INTEGRATOR_CLCD_LCD_STATIC | \ - INTEGRATOR_CLCD_LCD_N24BITEN) +#define INTEGRATOR_CLCD_MASK GENMASK(19, 8) static void pl111_integrator_enable(struct drm_device *drm, u32 format) { @@ -106,11 +96,8 @@ static void pl111_integrator_enable(struct drm_device *drm, u32 format) switch (format) { case DRM_FORMAT_XBGR8888: case DRM_FORMAT_XRGB8888: - break; - case DRM_FORMAT_BGR565: - case DRM_FORMAT_RGB565: - /* truecolor RGB565 */ - val |= INTEGRATOR_CLCD_LCDMUX_VGA565; + /* 24bit formats */ + val |= INTEGRATOR_CLCD_LCDMUX_VGA24; break; case DRM_FORMAT_XBGR1555: case DRM_FORMAT_XRGB1555: @@ -217,6 +204,88 @@ static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format) SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH); } +/* PL110 pixel formats for Integrator, vanilla PL110 */ +static const u32 pl110_integrator_pixel_formats[] = { + DRM_FORMAT_ABGR8888, + DRM_FORMAT_XBGR8888, + DRM_FORMAT_ARGB8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_ABGR1555, + DRM_FORMAT_XBGR1555, + DRM_FORMAT_ARGB1555, + DRM_FORMAT_XRGB1555, +}; + +/* Extended PL110 pixel formats for Integrator and Versatile */ +static const u32 pl110_versatile_pixel_formats[] = { + DRM_FORMAT_ABGR8888, + DRM_FORMAT_XBGR8888, + DRM_FORMAT_ARGB8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_BGR565, /* Uses external PLD */ + DRM_FORMAT_RGB565, /* Uses external PLD */ + DRM_FORMAT_ABGR1555, + DRM_FORMAT_XBGR1555, + DRM_FORMAT_ARGB1555, + DRM_FORMAT_XRGB1555, +}; + +static const u32 pl111_realview_pixel_formats[] = { + DRM_FORMAT_ABGR8888, + DRM_FORMAT_XBGR8888, + DRM_FORMAT_ARGB8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_BGR565, + DRM_FORMAT_RGB565, + DRM_FORMAT_ABGR1555, + DRM_FORMAT_XBGR1555, + DRM_FORMAT_ARGB1555, + DRM_FORMAT_XRGB1555, + DRM_FORMAT_ABGR4444, + DRM_FORMAT_XBGR4444, + DRM_FORMAT_ARGB4444, + DRM_FORMAT_XRGB4444, +}; + +/* + * The Integrator variant is a PL110 with a bunch of broken, or not + * yet implemented features + */ +static const struct pl111_variant_data pl110_integrator = { + .name = "PL110 Integrator", + .is_pl110 = true, + .broken_clockdivider = true, + .broken_vblank = true, + .formats = pl110_integrator_pixel_formats, + .nformats = ARRAY_SIZE(pl110_integrator_pixel_formats), + .fb_bpp = 16, +}; + +/* + * This is the in-between PL110 variant found in the ARM Versatile, + * supporting RGB565/BGR565 + */ +static const struct pl111_variant_data pl110_versatile = { + .name = "PL110 Versatile", + .is_pl110 = true, + .external_bgr = true, + .formats = pl110_versatile_pixel_formats, + .nformats = ARRAY_SIZE(pl110_versatile_pixel_formats), + .fb_bpp = 16, +}; + +/* + * RealView PL111 variant, the only real difference from the vanilla + * PL111 is that we select 16bpp framebuffer by default to be able + * to get 1024x768 without saturating the memory bus. + */ +static const struct pl111_variant_data pl111_realview = { + .name = "PL111 RealView", + .formats = pl111_realview_pixel_formats, + .nformats = ARRAY_SIZE(pl111_realview_pixel_formats), + .fb_bpp = 16, +}; + int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv) { const struct of_device_id *clcd_id; @@ -241,14 +310,24 @@ int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv) switch (versatile_clcd_type) { case INTEGRATOR_CLCD_CM: versatile_syscon_map = map; + priv->variant = &pl110_integrator; priv->variant_display_enable = pl111_integrator_enable; dev_info(dev, "set up callbacks for Integrator PL110\n"); break; case VERSATILE_CLCD: versatile_syscon_map = map; + /* This can do RGB565 with external PLD */ + priv->variant = &pl110_versatile; priv->variant_display_enable = pl111_versatile_enable; priv->variant_display_disable = pl111_versatile_disable; - dev_info(dev, "set up callbacks for Versatile PL110+\n"); + /* + * The Versatile has a variant halfway between PL110 + * and PL111 where these two registers have already been + * swapped. + */ + priv->ienb = CLCD_PL111_IENB; + priv->ctrl = CLCD_PL111_CNTL; + dev_info(dev, "set up callbacks for Versatile PL110\n"); break; case REALVIEW_CLCD_EB: case REALVIEW_CLCD_PB1176: @@ -256,6 +335,7 @@ int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv) case REALVIEW_CLCD_PBA8: case REALVIEW_CLCD_PBX: versatile_syscon_map = map; + priv->variant = &pl111_realview; priv->variant_display_enable = pl111_realview_clcd_enable; priv->variant_display_disable = pl111_realview_clcd_disable; dev_info(dev, "set up callbacks for RealView PL111\n"); |