drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
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/*
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* (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
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*
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* Parts of this file were based on sources as follows:
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*
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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* Copyright (C) 2011 Texas Instruments
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms of
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* such GNU licence.
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*
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*/
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#include <linux/amba/clcd-regs.h>
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#include <linux/clk.h>
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#include <linux/version.h>
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#include <linux/dma-buf.h>
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_gem_cma_helper.h>
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2017-08-13 20:31:56 +07:00
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#include <drm/drm_gem_framebuffer_helper.h>
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drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
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#include <drm/drm_fb_cma_helper.h>
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#include "pl111_drm.h"
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irqreturn_t pl111_irq(int irq, void *data)
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{
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struct pl111_drm_dev_private *priv = data;
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u32 irq_stat;
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irqreturn_t status = IRQ_NONE;
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irq_stat = readl(priv->regs + CLCD_PL111_MIS);
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if (!irq_stat)
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return IRQ_NONE;
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if (irq_stat & CLCD_IRQ_NEXTBASE_UPDATE) {
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drm_crtc_handle_vblank(&priv->pipe.crtc);
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status = IRQ_HANDLED;
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}
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/* Clear the interrupt once done */
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writel(irq_stat, priv->regs + CLCD_PL111_ICR);
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return status;
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}
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static int pl111_display_check(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *pstate,
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struct drm_crtc_state *cstate)
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{
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const struct drm_display_mode *mode = &cstate->mode;
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struct drm_framebuffer *old_fb = pipe->plane.state->fb;
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struct drm_framebuffer *fb = pstate->fb;
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if (mode->hdisplay % 16)
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return -EINVAL;
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if (fb) {
|
2017-06-03 08:57:33 +07:00
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u32 offset = drm_fb_cma_get_gem_addr(fb, pstate, 0);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
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/* FB base address must be dword aligned. */
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if (offset & 3)
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return -EINVAL;
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/* There's no pitch register -- the mode's hdisplay
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* controls it.
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*/
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if (fb->pitches[0] != mode->hdisplay * fb->format->cpp[0])
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return -EINVAL;
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/* We can't change the FB format in a flicker-free
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* manner (and only update it during CRTC enable).
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*/
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if (old_fb && old_fb->format != fb->format)
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cstate->mode_changed = true;
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}
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return 0;
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}
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static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
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struct drm_crtc_state *cstate)
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{
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struct drm_crtc *crtc = &pipe->crtc;
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struct drm_plane *plane = &pipe->plane;
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struct drm_device *drm = crtc->dev;
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struct pl111_drm_dev_private *priv = drm->dev_private;
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const struct drm_display_mode *mode = &cstate->mode;
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struct drm_framebuffer *fb = plane->state->fb;
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2017-09-08 19:47:05 +07:00
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struct drm_connector *connector = priv->connector;
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2018-01-12 14:48:54 +07:00
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struct drm_bridge *bridge = priv->bridge;
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
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u32 cntl;
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u32 ppl, hsw, hfp, hbp;
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u32 lpp, vsw, vfp, vbp;
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2017-05-09 02:33:48 +07:00
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u32 cpl, tim2;
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
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int ret;
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ret = clk_set_rate(priv->clk, mode->clock * 1000);
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if (ret) {
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dev_err(drm->dev,
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"Failed to set pixel clock rate to %d: %d\n",
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mode->clock * 1000, ret);
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}
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clk_prepare_enable(priv->clk);
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ppl = (mode->hdisplay / 16) - 1;
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hsw = mode->hsync_end - mode->hsync_start - 1;
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hfp = mode->hsync_start - mode->hdisplay - 1;
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hbp = mode->htotal - mode->hsync_end - 1;
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lpp = mode->vdisplay - 1;
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vsw = mode->vsync_end - mode->vsync_start - 1;
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vfp = mode->vsync_start - mode->vdisplay;
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vbp = mode->vtotal - mode->vsync_end;
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cpl = mode->hdisplay - 1;
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writel((ppl << 2) |
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(hsw << 8) |
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(hfp << 16) |
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(hbp << 24),
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priv->regs + CLCD_TIM0);
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writel(lpp |
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(vsw << 10) |
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(vfp << 16) |
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(vbp << 24),
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priv->regs + CLCD_TIM1);
|
2017-05-09 02:33:48 +07:00
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spin_lock(&priv->tim2_lock);
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tim2 = readl(priv->regs + CLCD_TIM2);
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tim2 &= (TIM2_BCD | TIM2_PCD_LO_MASK | TIM2_PCD_HI_MASK);
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2018-02-06 16:35:38 +07:00
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if (priv->variant->broken_clockdivider)
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tim2 |= TIM2_BCD;
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2017-05-09 02:33:48 +07:00
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if (mode->flags & DRM_MODE_FLAG_NHSYNC)
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tim2 |= TIM2_IHS;
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if (mode->flags & DRM_MODE_FLAG_NVSYNC)
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tim2 |= TIM2_IVS;
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2018-01-12 14:48:54 +07:00
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if (connector) {
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if (connector->display_info.bus_flags & DRM_BUS_FLAG_DE_LOW)
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tim2 |= TIM2_IOE;
|
2017-05-09 02:33:48 +07:00
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2018-01-12 14:48:54 +07:00
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if (connector->display_info.bus_flags &
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DRM_BUS_FLAG_PIXDATA_NEGEDGE)
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tim2 |= TIM2_IPC;
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}
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if (bridge) {
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const struct drm_bridge_timings *btimings = bridge->timings;
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/*
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* Here is when things get really fun. Sometimes the bridge
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* timings are such that the signal out from PL11x is not
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* stable before the receiving bridge (such as a dumb VGA DAC
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* or similar) samples it. If that happens, we compensate by
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* the only method we have: output the data on the opposite
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* edge of the clock so it is for sure stable when it gets
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* sampled.
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*
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* The PL111 manual does not contain proper timining diagrams
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* or data for these details, but we know from experiments
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* that the setup time is more than 3000 picoseconds (3 ns).
|
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* If we have a bridge that requires the signal to be stable
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* earlier than 3000 ps before the clock pulse, we have to
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* output the data on the opposite edge to avoid flicker.
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*/
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if (btimings && btimings->setup_time_ps >= 3000)
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tim2 ^= TIM2_IPC;
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}
|
2017-05-09 02:33:48 +07:00
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tim2 |= cpl << 16;
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writel(tim2, priv->regs + CLCD_TIM2);
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spin_unlock(&priv->tim2_lock);
|
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|
|
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
writel(0, priv->regs + CLCD_TIM3);
|
|
|
|
|
2017-09-08 19:47:07 +07:00
|
|
|
/* Hard-code TFT panel */
|
|
|
|
cntl = CNTL_LCDEN | CNTL_LCDTFT | CNTL_LCDVCOMP(1);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
|
|
|
/* Note that the the hardware's format reader takes 'r' from
|
|
|
|
* the low bit, while DRM formats list channels from high bit
|
|
|
|
* to low bit as you read left to right.
|
|
|
|
*/
|
|
|
|
switch (fb->format->format) {
|
|
|
|
case DRM_FORMAT_ABGR8888:
|
|
|
|
case DRM_FORMAT_XBGR8888:
|
|
|
|
cntl |= CNTL_LCDBPP24;
|
|
|
|
break;
|
|
|
|
case DRM_FORMAT_ARGB8888:
|
|
|
|
case DRM_FORMAT_XRGB8888:
|
|
|
|
cntl |= CNTL_LCDBPP24 | CNTL_BGR;
|
|
|
|
break;
|
|
|
|
case DRM_FORMAT_BGR565:
|
2018-02-06 16:35:37 +07:00
|
|
|
if (priv->variant->is_pl110)
|
|
|
|
cntl |= CNTL_LCDBPP16;
|
|
|
|
else
|
|
|
|
cntl |= CNTL_LCDBPP16_565;
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
break;
|
|
|
|
case DRM_FORMAT_RGB565:
|
2018-02-06 16:35:37 +07:00
|
|
|
if (priv->variant->is_pl110)
|
|
|
|
cntl |= CNTL_LCDBPP16;
|
|
|
|
else
|
|
|
|
cntl |= CNTL_LCDBPP16_565;
|
|
|
|
cntl |= CNTL_BGR;
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
break;
|
|
|
|
case DRM_FORMAT_ABGR1555:
|
|
|
|
case DRM_FORMAT_XBGR1555:
|
|
|
|
cntl |= CNTL_LCDBPP16;
|
|
|
|
break;
|
|
|
|
case DRM_FORMAT_ARGB1555:
|
|
|
|
case DRM_FORMAT_XRGB1555:
|
|
|
|
cntl |= CNTL_LCDBPP16 | CNTL_BGR;
|
|
|
|
break;
|
|
|
|
case DRM_FORMAT_ABGR4444:
|
|
|
|
case DRM_FORMAT_XBGR4444:
|
|
|
|
cntl |= CNTL_LCDBPP16_444;
|
|
|
|
break;
|
|
|
|
case DRM_FORMAT_ARGB4444:
|
|
|
|
case DRM_FORMAT_XRGB4444:
|
|
|
|
cntl |= CNTL_LCDBPP16_444 | CNTL_BGR;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
WARN_ONCE(true, "Unknown FB format 0x%08x\n",
|
|
|
|
fb->format->format);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2018-02-06 16:35:37 +07:00
|
|
|
/* The PL110 in Integrator/Versatile does the BGR routing externally */
|
|
|
|
if (priv->variant->external_bgr)
|
|
|
|
cntl &= ~CNTL_BGR;
|
|
|
|
|
2017-09-08 19:47:07 +07:00
|
|
|
/* Power sequence: first enable and chill */
|
|
|
|
writel(cntl, priv->regs + priv->ctrl);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We expect this delay to stabilize the contrast
|
|
|
|
* voltage Vee as stipulated by the manual
|
|
|
|
*/
|
|
|
|
msleep(20);
|
|
|
|
|
2017-09-08 19:47:08 +07:00
|
|
|
if (priv->variant_display_enable)
|
|
|
|
priv->variant_display_enable(drm, fb->format->format);
|
|
|
|
|
2017-09-08 19:47:07 +07:00
|
|
|
/* Power Up */
|
|
|
|
cntl |= CNTL_LCDPWR;
|
2017-09-08 19:47:06 +07:00
|
|
|
writel(cntl, priv->regs + priv->ctrl);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
2018-02-06 16:35:39 +07:00
|
|
|
if (!priv->variant->broken_vblank)
|
|
|
|
drm_crtc_vblank_on(crtc);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
void pl111_display_disable(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;
|
2017-09-08 19:47:07 +07:00
|
|
|
u32 cntl;
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
2018-02-06 16:35:39 +07:00
|
|
|
if (!priv->variant->broken_vblank)
|
|
|
|
drm_crtc_vblank_off(crtc);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
2017-09-08 19:47:07 +07:00
|
|
|
/* Power Down */
|
|
|
|
cntl = readl(priv->regs + priv->ctrl);
|
|
|
|
if (cntl & CNTL_LCDPWR) {
|
|
|
|
cntl &= ~CNTL_LCDPWR;
|
|
|
|
writel(cntl, priv->regs + priv->ctrl);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We expect this delay to stabilize the contrast voltage Vee as
|
|
|
|
* stipulated by the manual
|
|
|
|
*/
|
|
|
|
msleep(20);
|
|
|
|
|
2017-09-08 19:47:08 +07:00
|
|
|
if (priv->variant_display_disable)
|
|
|
|
priv->variant_display_disable(drm);
|
|
|
|
|
2017-09-08 19:47:07 +07:00
|
|
|
/* Disable */
|
2017-09-08 19:47:06 +07:00
|
|
|
writel(0, priv->regs + priv->ctrl);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
|
|
|
clk_disable_unprepare(priv->clk);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pl111_display_update(struct drm_simple_display_pipe *pipe,
|
|
|
|
struct drm_plane_state *old_pstate)
|
|
|
|
{
|
|
|
|
struct drm_crtc *crtc = &pipe->crtc;
|
|
|
|
struct drm_device *drm = crtc->dev;
|
|
|
|
struct pl111_drm_dev_private *priv = drm->dev_private;
|
|
|
|
struct drm_pending_vblank_event *event = crtc->state->event;
|
|
|
|
struct drm_plane *plane = &pipe->plane;
|
|
|
|
struct drm_plane_state *pstate = plane->state;
|
|
|
|
struct drm_framebuffer *fb = pstate->fb;
|
|
|
|
|
|
|
|
if (fb) {
|
2017-06-03 08:57:33 +07:00
|
|
|
u32 addr = drm_fb_cma_get_gem_addr(fb, pstate, 0);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
|
|
|
writel(addr, priv->regs + CLCD_UBAS);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (event) {
|
|
|
|
crtc->state->event = NULL;
|
|
|
|
|
|
|
|
spin_lock_irq(&crtc->dev->event_lock);
|
|
|
|
if (crtc->state->active && drm_crtc_vblank_get(crtc) == 0)
|
|
|
|
drm_crtc_arm_vblank_event(crtc, event);
|
|
|
|
else
|
|
|
|
drm_crtc_send_vblank_event(crtc, event);
|
|
|
|
spin_unlock_irq(&crtc->dev->event_lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int pl111_enable_vblank(struct drm_device *drm, unsigned int crtc)
|
|
|
|
{
|
|
|
|
struct pl111_drm_dev_private *priv = drm->dev_private;
|
|
|
|
|
2017-09-08 19:47:06 +07:00
|
|
|
writel(CLCD_IRQ_NEXTBASE_UPDATE, priv->regs + priv->ienb);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void pl111_disable_vblank(struct drm_device *drm, unsigned int crtc)
|
|
|
|
{
|
|
|
|
struct pl111_drm_dev_private *priv = drm->dev_private;
|
|
|
|
|
2017-09-08 19:47:06 +07:00
|
|
|
writel(0, priv->regs + priv->ienb);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int pl111_display_prepare_fb(struct drm_simple_display_pipe *pipe,
|
|
|
|
struct drm_plane_state *plane_state)
|
|
|
|
{
|
2017-08-13 20:31:56 +07:00
|
|
|
return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
}
|
|
|
|
|
2017-05-19 18:02:03 +07:00
|
|
|
static const struct drm_simple_display_pipe_funcs pl111_display_funcs = {
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
.check = pl111_display_check,
|
|
|
|
.enable = pl111_display_enable,
|
|
|
|
.disable = pl111_display_disable,
|
|
|
|
.update = pl111_display_update,
|
|
|
|
.prepare_fb = pl111_display_prepare_fb,
|
|
|
|
};
|
|
|
|
|
2017-05-09 02:33:48 +07:00
|
|
|
static int pl111_clk_div_choose_div(struct clk_hw *hw, unsigned long rate,
|
|
|
|
unsigned long *prate, bool set_parent)
|
|
|
|
{
|
|
|
|
int best_div = 1, div;
|
|
|
|
struct clk_hw *parent = clk_hw_get_parent(hw);
|
|
|
|
unsigned long best_prate = 0;
|
|
|
|
unsigned long best_diff = ~0ul;
|
|
|
|
int max_div = (1 << (TIM2_PCD_LO_BITS + TIM2_PCD_HI_BITS)) - 1;
|
|
|
|
|
|
|
|
for (div = 1; div < max_div; div++) {
|
|
|
|
unsigned long this_prate, div_rate, diff;
|
|
|
|
|
|
|
|
if (set_parent)
|
|
|
|
this_prate = clk_hw_round_rate(parent, rate * div);
|
|
|
|
else
|
|
|
|
this_prate = *prate;
|
|
|
|
div_rate = DIV_ROUND_UP_ULL(this_prate, div);
|
|
|
|
diff = abs(rate - div_rate);
|
|
|
|
|
|
|
|
if (diff < best_diff) {
|
|
|
|
best_div = div;
|
|
|
|
best_diff = diff;
|
|
|
|
best_prate = this_prate;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
*prate = best_prate;
|
|
|
|
return best_div;
|
|
|
|
}
|
|
|
|
|
|
|
|
static long pl111_clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
|
|
|
|
unsigned long *prate)
|
|
|
|
{
|
|
|
|
int div = pl111_clk_div_choose_div(hw, rate, prate, true);
|
|
|
|
|
|
|
|
return DIV_ROUND_UP_ULL(*prate, div);
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned long pl111_clk_div_recalc_rate(struct clk_hw *hw,
|
|
|
|
unsigned long prate)
|
|
|
|
{
|
|
|
|
struct pl111_drm_dev_private *priv =
|
|
|
|
container_of(hw, struct pl111_drm_dev_private, clk_div);
|
|
|
|
u32 tim2 = readl(priv->regs + CLCD_TIM2);
|
|
|
|
int div;
|
|
|
|
|
|
|
|
if (tim2 & TIM2_BCD)
|
|
|
|
return prate;
|
|
|
|
|
|
|
|
div = tim2 & TIM2_PCD_LO_MASK;
|
|
|
|
div |= (tim2 & TIM2_PCD_HI_MASK) >>
|
|
|
|
(TIM2_PCD_HI_SHIFT - TIM2_PCD_LO_BITS);
|
|
|
|
div += 2;
|
|
|
|
|
|
|
|
return DIV_ROUND_UP_ULL(prate, div);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pl111_clk_div_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
|
|
unsigned long prate)
|
|
|
|
{
|
|
|
|
struct pl111_drm_dev_private *priv =
|
|
|
|
container_of(hw, struct pl111_drm_dev_private, clk_div);
|
|
|
|
int div = pl111_clk_div_choose_div(hw, rate, &prate, false);
|
|
|
|
u32 tim2;
|
|
|
|
|
|
|
|
spin_lock(&priv->tim2_lock);
|
|
|
|
tim2 = readl(priv->regs + CLCD_TIM2);
|
|
|
|
tim2 &= ~(TIM2_BCD | TIM2_PCD_LO_MASK | TIM2_PCD_HI_MASK);
|
|
|
|
|
|
|
|
if (div == 1) {
|
|
|
|
tim2 |= TIM2_BCD;
|
|
|
|
} else {
|
|
|
|
div -= 2;
|
|
|
|
tim2 |= div & TIM2_PCD_LO_MASK;
|
|
|
|
tim2 |= (div >> TIM2_PCD_LO_BITS) << TIM2_PCD_HI_SHIFT;
|
|
|
|
}
|
|
|
|
|
|
|
|
writel(tim2, priv->regs + CLCD_TIM2);
|
|
|
|
spin_unlock(&priv->tim2_lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct clk_ops pl111_clk_div_ops = {
|
|
|
|
.recalc_rate = pl111_clk_div_recalc_rate,
|
|
|
|
.round_rate = pl111_clk_div_round_rate,
|
|
|
|
.set_rate = pl111_clk_div_set_rate,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int
|
|
|
|
pl111_init_clock_divider(struct drm_device *drm)
|
|
|
|
{
|
|
|
|
struct pl111_drm_dev_private *priv = drm->dev_private;
|
|
|
|
struct clk *parent = devm_clk_get(drm->dev, "clcdclk");
|
|
|
|
struct clk_hw *div = &priv->clk_div;
|
|
|
|
const char *parent_name;
|
|
|
|
struct clk_init_data init = {
|
|
|
|
.name = "pl111_div",
|
|
|
|
.ops = &pl111_clk_div_ops,
|
|
|
|
.parent_names = &parent_name,
|
|
|
|
.num_parents = 1,
|
|
|
|
.flags = CLK_SET_RATE_PARENT,
|
|
|
|
};
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (IS_ERR(parent)) {
|
|
|
|
dev_err(drm->dev, "CLCD: unable to get clcdclk.\n");
|
|
|
|
return PTR_ERR(parent);
|
|
|
|
}
|
2018-02-06 16:35:38 +07:00
|
|
|
/* If the clock divider is broken, use the parent directly */
|
|
|
|
if (priv->variant->broken_clockdivider) {
|
|
|
|
priv->clk = parent;
|
|
|
|
return 0;
|
|
|
|
}
|
2017-05-09 02:33:48 +07:00
|
|
|
parent_name = __clk_get_name(parent);
|
|
|
|
|
|
|
|
spin_lock_init(&priv->tim2_lock);
|
|
|
|
div->init = &init;
|
|
|
|
|
|
|
|
ret = devm_clk_hw_register(drm->dev, div);
|
|
|
|
|
|
|
|
priv->clk = div->clk;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
int pl111_display_init(struct drm_device *drm)
|
|
|
|
{
|
|
|
|
struct pl111_drm_dev_private *priv = drm->dev_private;
|
|
|
|
struct device *dev = drm->dev;
|
|
|
|
struct device_node *endpoint;
|
|
|
|
u32 tft_r0b0g0[3];
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
|
|
|
|
if (!endpoint)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (of_property_read_u32_array(endpoint,
|
|
|
|
"arm,pl11x,tft-r0g0b0-pads",
|
|
|
|
tft_r0b0g0,
|
|
|
|
ARRAY_SIZE(tft_r0b0g0)) != 0) {
|
|
|
|
dev_err(dev, "arm,pl11x,tft-r0g0b0-pads should be 3 ints\n");
|
|
|
|
of_node_put(endpoint);
|
|
|
|
return -ENOENT;
|
|
|
|
}
|
|
|
|
of_node_put(endpoint);
|
|
|
|
|
2017-05-09 02:33:48 +07:00
|
|
|
ret = pl111_init_clock_divider(drm);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
ret = drm_simple_display_pipe_init(drm, &priv->pipe,
|
|
|
|
&pl111_display_funcs,
|
2017-09-08 19:47:06 +07:00
|
|
|
priv->variant->formats,
|
|
|
|
priv->variant->nformats,
|
|
|
|
NULL,
|
|
|
|
priv->connector);
|
drm/pl111: Initial drm/kms driver for pl111
This is a modesetting driver for the pl111 CLCD display controller
found on various ARM platforms such as the Versatile Express. The
driver has only been tested on the bcm911360_entphn platform so far,
with PRIME-based buffer sharing between vc4 and clcd.
It reuses the existing devicetree binding, while not using quite as
many of its properties as the fbdev driver does (those are left for
future work).
v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks
to DRM core's excellent new helpers.
v3: Don't match pl110 any more, don't attach if we don't have a DRM
panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple
display helper, use drm_gem_cma_dumb_create (same as our wrapper).
v4: Change the driver's .name to not clash with fbdev in sysfs, drop
platform alias, drop redundant "drm" in DRM driver name, hook up
.prepare_fb to the CMA helper so that DMA fences should work.
v5: Move register definitions inside the driver directory, fix build
in COMPILE_TEST and !AMBA mode.
v6: Drop TIM2_CLKSEL for now to be consistent with existing DT
bindings, switch back to external register definitions.
Signed-off-by: Tom Cooksey <tom.cooksey@arm.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5)
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-13 10:17:46 +07:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|