[PATCH v5 35/52] drm/omap: venc: Register a drm_bridge

In order to integrate with a chain of drm_bridge, the internal VENC encoder has to expose the mode valid, fixup and set, the enable and disable and the get modes operations through the drm_bridge API. Register a bridge at initialisation time to do so.

Most of those operations are removed from the omap_dss_device as they are now called through the drm_bridge API by the DRM atomic helpers. The only exception is the .get_modes() operation that is still invoked through the omap_dss_device-based pipeline.

For the time being make the next bridge in the chain optional as the VENC output is still based on omap_dss_device. The create_connector argument to the bridge attach function is also ignored for the same reason. This will be changed later when removing the related omapdrm-specific display drivers.

Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Reviewed-by: Tomi Valkeinen tomi.valkeinen@ti.com --- Changes since v4:

- Set bridge interlace_allowed flag

Changes since v3:

- Drop unneeded venc_lock

Changes since v2:

- Unregister bridge if output initialisation fails --- drivers/gpu/drm/omapdrm/dss/venc.c | 244 ++++++++++++++++++----------- 1 file changed, 156 insertions(+), 88 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c index 977d8d525b43..88391f24ca8f 100644 --- a/drivers/gpu/drm/omapdrm/dss/venc.c +++ b/drivers/gpu/drm/omapdrm/dss/venc.c @@ -13,7 +13,6 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> -#include <linux/mutex.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/string.h> @@ -26,6 +25,8 @@ #include <linux/component.h> #include <linux/sys_soc.h>

+#include <drm/drm_bridge.h> + #include "omapdss.h" #include "dss.h"

@@ -289,7 +290,6 @@ static const struct drm_display_mode omap_dss_ntsc_mode = { struct venc_device { struct platform_device *pdev; void __iomem *base; - struct mutex venc_lock; struct regulator *vdda_dac_reg; struct dss_device *dss;

@@ -303,9 +303,11 @@ struct venc_device { bool requires_tv_dac_clk;

struct omap_dss_device output; + struct drm_bridge bridge; };

#define dssdev_to_venc(dssdev) container_of(dssdev, struct venc_device, output) +#define drm_bridge_to_venc(b) container_of(b, struct venc_device, bridge)

static inline void venc_write_reg(struct venc_device *venc, int idx, u32 val) { @@ -477,32 +479,6 @@ static void venc_power_off(struct venc_device *venc) venc_runtime_put(venc); }

-static void venc_display_enable(struct omap_dss_device *dssdev) -{ - struct venc_device *venc = dssdev_to_venc(dssdev); - - DSSDBG("venc_display_enable\n"); - - mutex_lock(&venc->venc_lock); - - venc_power_on(venc); - - mutex_unlock(&venc->venc_lock); -} - -static void venc_display_disable(struct omap_dss_device *dssdev) -{ - struct venc_device *venc = dssdev_to_venc(dssdev); - - DSSDBG("venc_display_disable\n"); - - mutex_lock(&venc->venc_lock); - - venc_power_off(venc); - - mutex_unlock(&venc->venc_lock); -} - static int venc_get_modes(struct omap_dss_device *dssdev, struct drm_connector *connector) { @@ -545,57 +521,6 @@ static enum venc_videomode venc_get_videomode(const struct drm_display_mode *mod return VENC_MODE_UNKNOWN; }

-static void venc_set_timings(struct omap_dss_device *dssdev, - const struct drm_display_mode *mode) -{ - struct venc_device *venc = dssdev_to_venc(dssdev); - enum venc_videomode venc_mode = venc_get_videomode(mode); - - DSSDBG("venc_set_timings\n"); - - mutex_lock(&venc->venc_lock); - - switch (venc_mode) { - default: - WARN_ON_ONCE(1); - /* Fall-through */ - case VENC_MODE_PAL: - venc->config = &venc_config_pal_trm; - break; - - case VENC_MODE_NTSC: - venc->config = &venc_config_ntsc_trm; - break; - } - - dispc_set_tv_pclk(venc->dss->dispc, 13500000); - - mutex_unlock(&venc->venc_lock); -} - -static int venc_check_timings(struct omap_dss_device *dssdev, - struct drm_display_mode *mode) -{ - DSSDBG("venc_check_timings\n"); - - switch (venc_get_videomode(mode)) { - case VENC_MODE_PAL: - drm_mode_copy(mode, &omap_dss_pal_mode); - break; - - case VENC_MODE_NTSC: - drm_mode_copy(mode, &omap_dss_ntsc_mode); - break; - - default: - return -EINVAL; - } - - drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); - drm_mode_set_name(mode); - return 0; -} - static int venc_dump_regs(struct seq_file *s, void *p) { struct venc_device *venc = s->private; @@ -689,15 +614,154 @@ static const struct omap_dss_device_ops venc_ops = { .connect = venc_connect, .disconnect = venc_disconnect,

- .enable = venc_display_enable, - .disable = venc_display_disable, + .get_modes = venc_get_modes, +};

- .check_timings = venc_check_timings, - .set_timings = venc_set_timings, +/* ----------------------------------------------------------------------------- + * DRM Bridge Operations + */

- .get_modes = venc_get_modes, +static int venc_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct venc_device *venc = drm_bridge_to_venc(bridge); + + if (venc->output.next_bridge) + return 0; + + return drm_bridge_attach(bridge->encoder, venc->output.next_bridge, + bridge, flags); +} + +static enum drm_mode_status +venc_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_mode *mode) +{ + switch (venc_get_videomode(mode)) { + case VENC_MODE_PAL: + case VENC_MODE_NTSC: + return MODE_OK; + + default: + return MODE_BAD; + } +} + +static bool venc_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + const struct drm_display_mode *venc_mode; + + switch (venc_get_videomode(adjusted_mode)) { + case VENC_MODE_PAL: + venc_mode = &omap_dss_pal_mode; + break; + + case VENC_MODE_NTSC: + venc_mode = &omap_dss_ntsc_mode; + break; + + default: + return false; + } + + drm_mode_copy(adjusted_mode, venc_mode); + drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); + drm_mode_set_name(adjusted_mode); + + return true; +} + +static void venc_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct venc_device *venc = drm_bridge_to_venc(bridge); + enum venc_videomode venc_mode = venc_get_videomode(adjusted_mode); + + switch (venc_mode) { + default: + WARN_ON_ONCE(1); + /* Fall-through */ + case VENC_MODE_PAL: + venc->config = &venc_config_pal_trm; + break; + + case VENC_MODE_NTSC: + venc->config = &venc_config_ntsc_trm; + break; + } + + dispc_set_tv_pclk(venc->dss->dispc, 13500000); +} + +static void venc_bridge_enable(struct drm_bridge *bridge, + struct drm_atomic_state *state) +{ + struct venc_device *venc = drm_bridge_to_venc(bridge); + + venc_power_on(venc); +} + +static void venc_bridge_disable(struct drm_bridge *bridge, + struct drm_atomic_state *state) +{ + struct venc_device *venc = drm_bridge_to_venc(bridge); + + venc_power_off(venc); +} + +static int venc_bridge_get_modes(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + static const struct drm_display_mode *modes[] = { + &omap_dss_pal_mode, + &omap_dss_ntsc_mode, + }; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(modes); ++i) { + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(connector->dev, modes[i]); + if (!mode) + return i; + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + drm_mode_set_name(mode); + drm_mode_probed_add(connector, mode); + } + + return ARRAY_SIZE(modes); +} + +static const struct drm_bridge_funcs venc_bridge_funcs = { + .attach = venc_bridge_attach, + .mode_valid = venc_bridge_mode_valid, + .mode_fixup = venc_bridge_mode_fixup, + .mode_set = venc_bridge_mode_set, + .atomic_enable = venc_bridge_enable, + .atomic_disable = venc_bridge_disable, + .get_modes = venc_bridge_get_modes, };

+static void venc_bridge_init(struct venc_device *venc) +{ + venc->bridge.funcs = &venc_bridge_funcs; + venc->bridge.of_node = venc->pdev->dev.of_node; + venc->bridge.ops = DRM_BRIDGE_OP_MODES; + venc->bridge.type = DRM_MODE_CONNECTOR_SVIDEO; + venc->bridge.interlace_allowed = true; + + drm_bridge_add(&venc->bridge); +} + +static void venc_bridge_cleanup(struct venc_device *venc) +{ + drm_bridge_remove(&venc->bridge); +} + /* ----------------------------------------------------------------------------- * Component Bind & Unbind */ @@ -747,6 +811,8 @@ static int venc_init_output(struct venc_device *venc) struct omap_dss_device *out = &venc->output; int r;

+ venc_bridge_init(venc); + out->dev = &venc->pdev->dev; out->id = OMAP_DSS_OUTPUT_VENC; out->type = OMAP_DISPLAY_TYPE_VENC; @@ -757,9 +823,11 @@ static int venc_init_output(struct venc_device *venc) out->of_port = 0; out->ops_flags = OMAP_DSS_DEVICE_OP_MODES;

- r = omapdss_device_init_output(out, NULL); - if (r < 0) + r = omapdss_device_init_output(out, &venc->bridge); + if (r < 0) { + venc_bridge_cleanup(venc); return r; + }

omapdss_device_register(out);

@@ -770,6 +838,8 @@ static void venc_uninit_output(struct venc_device *venc) { omapdss_device_unregister(&venc->output); omapdss_device_cleanup_output(&venc->output); + + venc_bridge_cleanup(venc); }

static int venc_probe_of(struct venc_device *venc) @@ -839,8 +909,6 @@ static int venc_probe(struct platform_device *pdev) if (soc_device_match(venc_soc_devices)) venc->requires_tv_dac_clk = true;

- mutex_init(&venc->venc_lock); - venc->config = &venc_config_pal_trm;

venc_mem = platform_get_resource(venc->pdev, IORESOURCE_MEM, 0);