In order to support multiple outputs we need to move the output mode
selection to the CRTC object, so that the output validity check can be
done against the drm_atomic_state.
If the connectors selected by a specific mode setting are requiring
incompatible bus format the atomic operation is aborted (->atomic_check()
returns -EINVAL).
In order to implement that, we need to define our own CRTC state and
overload default ->reset(), ->atomic_duplicate_state() and
->atomic_destroy_state() functions.
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 140 ++++++++++++++++++++++-
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 3 +
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 3 +
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 46 --------
4 files changed, 142 insertions(+), 50 deletions(-)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 468a14f..be30bd2 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -32,6 +32,23 @@
#include "atmel_hlcdc_dc.h"
/**
+ * Atmel HLCDC CRTC state structure
+ *
+ * @base: base CRTC state
+ * @output_mode: RGBXXX output mode
+ */
+struct atmel_hlcdc_crtc_state {
+ struct drm_crtc_state base;
+ unsigned int output_mode;
+};
+
+static inline struct atmel_hlcdc_crtc_state *
+drm_crtc_state_to_atmel_hlcdc_crtc_state(struct drm_crtc_state *state)
+{
+ return container_of(state, struct atmel_hlcdc_crtc_state, base);
+}
+
+/**
* Atmel HLCDC CRTC structure
*
* @base: base DRM CRTC structure
@@ -59,6 +76,7 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
struct regmap *regmap = crtc->dc->hlcdc->regmap;
struct drm_display_mode *adj = &c->state->adjusted_mode;
+ struct atmel_hlcdc_crtc_state *state;
unsigned long mode_rate;
struct videomode vm;
unsigned long prate;
@@ -112,12 +130,15 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
if (adj->flags & DRM_MODE_FLAG_NHSYNC)
cfg |= ATMEL_HLCDC_HSPOL;
+ state = drm_crtc_state_to_atmel_hlcdc_crtc_state(c->state);
+ cfg |= state->output_mode << 8;
+
regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
ATMEL_HLCDC_HSPOL | ATMEL_HLCDC_VSPOL |
ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE |
ATMEL_HLCDC_DISPPOL | ATMEL_HLCDC_DISPDLY |
ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
- ATMEL_HLCDC_GUARDTIME_MASK,
+ ATMEL_HLCDC_GUARDTIME_MASK | ATMEL_HLCDC_MODE_MASK,
cfg);
}
@@ -228,14 +249,78 @@ void atmel_hlcdc_crtc_resume(struct drm_crtc *c)
}
}
+#define ATMEL_HLCDC_RGB444_OUTPUT BIT(0)
+#define ATMEL_HLCDC_RGB565_OUTPUT BIT(1)
+#define ATMEL_HLCDC_RGB666_OUTPUT BIT(2)
+#define ATMEL_HLCDC_RGB888_OUTPUT BIT(3)
+#define ATMEL_HLCDC_OUTPUT_MODE_MASK GENMASK(3, 0)
+
+static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
+{
+ unsigned int output_fmts = ATMEL_HLCDC_OUTPUT_MODE_MASK;
+ struct atmel_hlcdc_crtc_state *hstate;
+ struct drm_connector_state *cstate;
+ struct drm_connector *connector;
+ struct atmel_hlcdc_crtc *crtc;
+ int i;
+
+ crtc = drm_crtc_to_atmel_hlcdc_crtc(state->crtc);
+
+ for_each_connector_in_state(state->state, connector, cstate, i) {
+ struct drm_display_info *info = &connector->display_info;
+ unsigned int supported_fmts = 0;
+ int j;
+
+ if (!cstate->crtc)
+ continue;
+
+ for (j = 0; j < info->num_bus_formats; j++) {
+ switch (info->bus_formats[j]) {
+ case MEDIA_BUS_FMT_RGB444_1X12:
+ supported_fmts |= ATMEL_HLCDC_RGB444_OUTPUT;
+ break;
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ supported_fmts |= ATMEL_HLCDC_RGB565_OUTPUT;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ supported_fmts |= ATMEL_HLCDC_RGB666_OUTPUT;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ supported_fmts |= ATMEL_HLCDC_RGB888_OUTPUT;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (crtc->dc->desc->conflicting_output_formats)
+ output_fmts &= supported_fmts;
+ else
+ output_fmts |= supported_fmts;
+ }
+
+ if (!output_fmts)
+ return -EINVAL;
+
+ hstate = drm_crtc_state_to_atmel_hlcdc_crtc_state(state);
+ hstate->output_mode = fls(output_fmts) - 1;
+
+ return 0;
+}
+
static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c,
struct drm_crtc_state *s)
{
struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+ int ret;
if (atmel_hlcdc_dc_mode_valid(crtc->dc, &s->adjusted_mode) != MODE_OK)
return -EINVAL;
+ ret = atmel_hlcdc_crtc_select_output_mode(s);
+ if (ret)
+ return ret;
+
return atmel_hlcdc_plane_prepare_disc_area(s);
}
@@ -318,13 +403,60 @@ void atmel_hlcdc_crtc_irq(struct drm_crtc *c)
atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c));
}
+void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
+{
+ struct atmel_hlcdc_crtc_state *state;
+
+ if (crtc->state && crtc->state->mode_blob)
+ drm_property_unreference_blob(crtc->state->mode_blob);
+
+ if (crtc->state) {
+ state = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
+ kfree(state);
+ }
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (state) {
+ crtc->state = &state->base;
+ crtc->state->crtc = crtc;
+ }
+}
+
+static struct drm_crtc_state *
+atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
+{
+ struct atmel_hlcdc_crtc_state *state, *cur;
+
+ if (WARN_ON(!crtc->state))
+ return NULL;
+
+ state = kmalloc(sizeof(*state), GFP_KERNEL);
+ if (state)
+ __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
+
+ cur = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
+ state->output_mode = cur->output_mode;
+
+ return &state->base;
+}
+
+static void atmel_hlcdc_crtc_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *s)
+{
+ struct atmel_hlcdc_crtc_state *state;
+
+ state = drm_crtc_state_to_atmel_hlcdc_crtc_state(s);
+ __drm_atomic_helper_crtc_destroy_state(crtc, s);
+ kfree(state);
+}
+
static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs = {
.page_flip = drm_atomic_helper_page_flip,
.set_config = drm_atomic_helper_set_config,
.destroy = atmel_hlcdc_crtc_destroy,
- .reset = drm_atomic_helper_crtc_reset,
- .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+ .reset = atmel_hlcdc_crtc_reset,
+ .atomic_duplicate_state = atmel_hlcdc_crtc_duplicate_state,
+ .atomic_destroy_state = atmel_hlcdc_crtc_destroy_state,
};
int atmel_hlcdc_crtc_create(struct drm_device *dev)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index 66f97e1..3f8bfa6 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -53,6 +53,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9n12 = {
.max_spw = 0x3f,
.max_vpw = 0x3f,
.max_hpw = 0xff,
+ .conflicting_output_formats = true,
.nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9n12_layers),
.layers = atmel_hlcdc_at91sam9n12_layers,
};
@@ -140,6 +141,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9x5 = {
.max_spw = 0x3f,
.max_vpw = 0x3f,
.max_hpw = 0xff,
+ .conflicting_output_formats = true,
.nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9x5_layers),
.layers = atmel_hlcdc_at91sam9x5_layers,
};
@@ -246,6 +248,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
.max_spw = 0x3f,
.max_vpw = 0x3f,
.max_hpw = 0x1ff,
+ .conflicting_output_formats = true,
.nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
.layers = atmel_hlcdc_sama5d3_layers,
};
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
index 864791e..eabf9c6 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
@@ -53,6 +53,8 @@
* @max_spw: maximum vertical/horizontal pulse width
* @max_vpw: maximum vertical back/front porch width
* @max_hpw: maximum horizontal back/front porch width
+ * @conflicting_output_formats: true if RGBXXX output formats conflict with
+ * each other.
* @layers: a layer description table describing available layers
* @nlayers: layer description table size
*/
@@ -64,6 +66,7 @@ struct atmel_hlcdc_dc_desc {
int max_spw;
int max_vpw;
int max_hpw;
+ bool conflicting_output_formats;
const struct atmel_hlcdc_layer_desc *layers;
int nlayers;
};
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
index 2255dc9..75237b5 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
@@ -27,16 +27,6 @@
#include "atmel_hlcdc_dc.h"
/**
- * Atmel HLCDC RGB output mode
- */
-enum atmel_hlcdc_connector_rgb_mode {
- ATMEL_HLCDC_CONNECTOR_RGB444,
- ATMEL_HLCDC_CONNECTOR_RGB565,
- ATMEL_HLCDC_CONNECTOR_RGB666,
- ATMEL_HLCDC_CONNECTOR_RGB888,
-};
-
-/**
* Atmel HLCDC RGB connector structure
*
* This structure stores RGB slave device information.
@@ -89,7 +79,6 @@ static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder)
struct atmel_hlcdc_rgb_output *rgb =
drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
-
drm_panel_enable(panel->panel);
}
@@ -102,42 +91,7 @@ static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder)
drm_panel_disable(panel->panel);
}
-static void
-atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted)
-{
- struct atmel_hlcdc_rgb_output *rgb =
- drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
- struct drm_display_info *info = &rgb->connector.display_info;
- unsigned int cfg;
-
- cfg = 0;
-
- if (info->num_bus_formats) {
- switch (info->bus_formats[0]) {
- case MEDIA_BUS_FMT_RGB565_1X16:
- cfg |= ATMEL_HLCDC_CONNECTOR_RGB565 << 8;
- break;
- case MEDIA_BUS_FMT_RGB666_1X18:
- cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
- break;
- case MEDIA_BUS_FMT_RGB888_1X24:
- cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
- break;
- case MEDIA_BUS_FMT_RGB444_1X12:
- default:
- break;
- }
- }
-
- regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
- ATMEL_HLCDC_MODE_MASK,
- cfg);
-}
-
static const struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
- .mode_set = atmel_hlcdc_rgb_encoder_mode_set,
.disable = atmel_hlcdc_panel_encoder_disable,
.enable = atmel_hlcdc_panel_encoder_enable,
};
--
2.1.4
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