diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/rcar-du/rcar_du_encoder.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/rcar-du/rcar_du_encoder.c')
-rw-r--r-- | kernel/drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/kernel/drivers/gpu/drm/rcar-du/rcar_du_encoder.c new file mode 100644 index 000000000..d0ae1e800 --- /dev/null +++ b/kernel/drivers/gpu/drm/rcar-du/rcar_du_encoder.c @@ -0,0 +1,209 @@ +/* + * rcar_du_encoder.c -- R-Car Display Unit Encoder + * + * Copyright (C) 2013-2014 Renesas Electronics Corporation + * + * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/export.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> + +#include "rcar_du_drv.h" +#include "rcar_du_encoder.h" +#include "rcar_du_hdmicon.h" +#include "rcar_du_hdmienc.h" +#include "rcar_du_kms.h" +#include "rcar_du_lvdscon.h" +#include "rcar_du_lvdsenc.h" +#include "rcar_du_vgacon.h" + +/* ----------------------------------------------------------------------------- + * Common connector functions + */ + +struct drm_encoder * +rcar_du_connector_best_encoder(struct drm_connector *connector) +{ + struct rcar_du_connector *rcon = to_rcar_connector(connector); + + return rcar_encoder_to_drm_encoder(rcon->encoder); +} + +/* ----------------------------------------------------------------------------- + * Encoder + */ + +static void rcar_du_encoder_disable(struct drm_encoder *encoder) +{ + struct rcar_du_encoder *renc = to_rcar_encoder(encoder); + + if (renc->lvds) + rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false); +} + +static void rcar_du_encoder_enable(struct drm_encoder *encoder) +{ + struct rcar_du_encoder *renc = to_rcar_encoder(encoder); + + if (renc->lvds) + rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, true); +} + +static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct rcar_du_encoder *renc = to_rcar_encoder(encoder); + struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; + const struct drm_display_mode *mode = &crtc_state->mode; + const struct drm_display_mode *panel_mode; + struct drm_connector *connector = conn_state->connector; + struct drm_device *dev = encoder->dev; + + /* DAC encoders have currently no restriction on the mode. */ + if (encoder->encoder_type == DRM_MODE_ENCODER_DAC) + return 0; + + if (list_empty(&connector->modes)) { + dev_dbg(dev->dev, "encoder: empty modes list\n"); + return -EINVAL; + } + + panel_mode = list_first_entry(&connector->modes, + struct drm_display_mode, head); + + /* We're not allowed to modify the resolution. */ + if (mode->hdisplay != panel_mode->hdisplay || + mode->vdisplay != panel_mode->vdisplay) + return -EINVAL; + + /* The flat panel mode is fixed, just copy it to the adjusted mode. */ + drm_mode_copy(adjusted_mode, panel_mode); + + /* The internal LVDS encoder has a clock frequency operating range of + * 30MHz to 150MHz. Clamp the clock accordingly. + */ + if (renc->lvds) + adjusted_mode->clock = clamp(adjusted_mode->clock, + 30000, 150000); + + return 0; +} + +static void rcar_du_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct rcar_du_encoder *renc = to_rcar_encoder(encoder); + + rcar_du_crtc_route_output(encoder->crtc, renc->output); +} + +static const struct drm_encoder_helper_funcs encoder_helper_funcs = { + .mode_set = rcar_du_encoder_mode_set, + .disable = rcar_du_encoder_disable, + .enable = rcar_du_encoder_enable, + .atomic_check = rcar_du_encoder_atomic_check, +}; + +static const struct drm_encoder_funcs encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +int rcar_du_encoder_init(struct rcar_du_device *rcdu, + enum rcar_du_encoder_type type, + enum rcar_du_output output, + struct device_node *enc_node, + struct device_node *con_node) +{ + struct rcar_du_encoder *renc; + struct drm_encoder *encoder; + unsigned int encoder_type; + int ret; + + renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL); + if (renc == NULL) + return -ENOMEM; + + renc->output = output; + encoder = rcar_encoder_to_drm_encoder(renc); + + switch (output) { + case RCAR_DU_OUTPUT_LVDS0: + renc->lvds = rcdu->lvds[0]; + break; + + case RCAR_DU_OUTPUT_LVDS1: + renc->lvds = rcdu->lvds[1]; + break; + + default: + break; + } + + switch (type) { + case RCAR_DU_ENCODER_VGA: + encoder_type = DRM_MODE_ENCODER_DAC; + break; + case RCAR_DU_ENCODER_LVDS: + encoder_type = DRM_MODE_ENCODER_LVDS; + break; + case RCAR_DU_ENCODER_HDMI: + encoder_type = DRM_MODE_ENCODER_TMDS; + break; + case RCAR_DU_ENCODER_NONE: + default: + /* No external encoder, use the internal encoder type. */ + encoder_type = rcdu->info->routes[output].encoder_type; + break; + } + + if (type == RCAR_DU_ENCODER_HDMI) { + ret = rcar_du_hdmienc_init(rcdu, renc, enc_node); + if (ret < 0) + goto done; + } else { + ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs, + encoder_type); + if (ret < 0) + goto done; + + drm_encoder_helper_add(encoder, &encoder_helper_funcs); + } + + switch (encoder_type) { + case DRM_MODE_ENCODER_LVDS: + ret = rcar_du_lvds_connector_init(rcdu, renc, con_node); + break; + + case DRM_MODE_ENCODER_DAC: + ret = rcar_du_vga_connector_init(rcdu, renc); + break; + + case DRM_MODE_ENCODER_TMDS: + ret = rcar_du_hdmi_connector_init(rcdu, renc); + break; + + default: + ret = -EINVAL; + break; + } + +done: + if (ret < 0) { + if (encoder->name) + encoder->funcs->destroy(encoder); + devm_kfree(rcdu->dev, renc); + } + + return ret; +} |