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Subject[PATCH 4.9 84/93] drm/vc4: Fix ->clock_select setting for the VEC encoder
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boris Brezillon <boris.brezillon@free-electrons.com>

commit ab8df60e3a3b68420d0d4477c5f07c00fbfb078b upstream.

PV_CONTROL_CLK_SELECT_VEC is actually 2 and not 0. Fix the definition and
rework the vc4_set_crtc_possible_masks() to cover the full range of the
PV_CONTROL_CLK_SELECT field.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Cc: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
drivers/gpu/drm/vc4/vc4_crtc.c | 36 ++++++++++++++++++++++--------------
drivers/gpu/drm/vc4/vc4_drv.h | 1 +
drivers/gpu/drm/vc4/vc4_regs.h | 3 ++-
3 files changed, 25 insertions(+), 15 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -83,8 +83,7 @@ struct vc4_crtc_data {
/* Which channel of the HVS this pixelvalve sources from. */
int hvs_channel;

- enum vc4_encoder_type encoder0_type;
- enum vc4_encoder_type encoder1_type;
+ enum vc4_encoder_type encoder_types[4];
};

#define CRTC_WRITE(offset, val) writel(val, vc4_crtc->regs + (offset))
@@ -867,20 +866,26 @@ static const struct drm_crtc_helper_func

static const struct vc4_crtc_data pv0_data = {
.hvs_channel = 0,
- .encoder0_type = VC4_ENCODER_TYPE_DSI0,
- .encoder1_type = VC4_ENCODER_TYPE_DPI,
+ .encoder_types = {
+ [PV_CONTROL_CLK_SELECT_DSI] = VC4_ENCODER_TYPE_DSI0,
+ [PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_DPI,
+ },
};

static const struct vc4_crtc_data pv1_data = {
.hvs_channel = 2,
- .encoder0_type = VC4_ENCODER_TYPE_DSI1,
- .encoder1_type = VC4_ENCODER_TYPE_SMI,
+ .encoder_types = {
+ [PV_CONTROL_CLK_SELECT_DSI] = VC4_ENCODER_TYPE_DSI1,
+ [PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_SMI,
+ },
};

static const struct vc4_crtc_data pv2_data = {
.hvs_channel = 1,
- .encoder0_type = VC4_ENCODER_TYPE_VEC,
- .encoder1_type = VC4_ENCODER_TYPE_HDMI,
+ .encoder_types = {
+ [PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_HDMI,
+ [PV_CONTROL_CLK_SELECT_VEC] = VC4_ENCODER_TYPE_VEC,
+ },
};

static const struct of_device_id vc4_crtc_dt_match[] = {
@@ -894,17 +899,20 @@ static void vc4_set_crtc_possible_masks(
struct drm_crtc *crtc)
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ const struct vc4_crtc_data *crtc_data = vc4_crtc->data;
+ const enum vc4_encoder_type *encoder_types = crtc_data->encoder_types;
struct drm_encoder *encoder;

drm_for_each_encoder(encoder, drm) {
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
+ int i;

- if (vc4_encoder->type == vc4_crtc->data->encoder0_type) {
- vc4_encoder->clock_select = 0;
- encoder->possible_crtcs |= drm_crtc_mask(crtc);
- } else if (vc4_encoder->type == vc4_crtc->data->encoder1_type) {
- vc4_encoder->clock_select = 1;
- encoder->possible_crtcs |= drm_crtc_mask(crtc);
+ for (i = 0; i < ARRAY_SIZE(crtc_data->encoder_types); i++) {
+ if (vc4_encoder->type == encoder_types[i]) {
+ vc4_encoder->clock_select = i;
+ encoder->possible_crtcs |= drm_crtc_mask(crtc);
+ break;
+ }
}
}
}
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -194,6 +194,7 @@ to_vc4_plane(struct drm_plane *plane)
}

enum vc4_encoder_type {
+ VC4_ENCODER_TYPE_NONE,
VC4_ENCODER_TYPE_HDMI,
VC4_ENCODER_TYPE_VEC,
VC4_ENCODER_TYPE_DSI0,
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -177,8 +177,9 @@
# define PV_CONTROL_WAIT_HSTART BIT(12)
# define PV_CONTROL_PIXEL_REP_MASK VC4_MASK(5, 4)
# define PV_CONTROL_PIXEL_REP_SHIFT 4
-# define PV_CONTROL_CLK_SELECT_DSI_VEC 0
+# define PV_CONTROL_CLK_SELECT_DSI 0
# define PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI 1
+# define PV_CONTROL_CLK_SELECT_VEC 2
# define PV_CONTROL_CLK_SELECT_MASK VC4_MASK(3, 2)
# define PV_CONTROL_CLK_SELECT_SHIFT 2
# define PV_CONTROL_FIFO_CLR BIT(1)

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