drm/i915: Don't cast away const from infoframe buffer

We don't modify the packed infoframe data, so we should keep the
const qualifier in place. Just pass the buffer as 'const void *'
instead of 'const uint8_t *' and we can drop the cast entirely.

v2: Do intel_sdvo_write_infoframe() as well

Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 9f8b465..79585cd 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -455,7 +455,7 @@ struct intel_hdmi {
        bool rgb_quant_range_selectable;
        void (*write_infoframe)(struct drm_encoder *encoder,
                                enum hdmi_infoframe_type type,
-                               const uint8_t *frame, ssize_t len);
+                               const void *frame, ssize_t len);
        void (*set_infoframes)(struct drm_encoder *encoder,
                               struct drm_display_mode *adjusted_mode);
 };

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 6a6ad0c..6db0d9d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -130,9 +130,9 @@ static u32 hsw_infoframe_data_reg(enum hdmi_infoframe_type type,
 
 static void g4x_write_infoframe(struct drm_encoder *encoder,
                                enum hdmi_infoframe_type type,
-                               const uint8_t *frame, ssize_t len)
+                               const void *frame, ssize_t len)
 {
-       uint32_t *data = (uint32_t *)frame;
+       const uint32_t *data = frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        u32 val = I915_READ(VIDEO_DIP_CTL);
@@ -167,9 +167,9 @@ static void g4x_write_infoframe(struct drm_encoder *encoder,
 
 static void ibx_write_infoframe(struct drm_encoder *encoder,
                                enum hdmi_infoframe_type type,
-                               const uint8_t *frame, ssize_t len)
+                               const void *frame, ssize_t len)
 {
-       uint32_t *data = (uint32_t *)frame;
+       const uint32_t *data = frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
@@ -205,9 +205,9 @@ static void ibx_write_infoframe(struct drm_encoder *encoder,
 
 static void cpt_write_infoframe(struct drm_encoder *encoder,
                                enum hdmi_infoframe_type type,
-                               const uint8_t *frame, ssize_t len)
+                               const void *frame, ssize_t len)
 {
-       uint32_t *data = (uint32_t *)frame;
+       const uint32_t *data = frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
@@ -246,9 +246,9 @@ static void cpt_write_infoframe(struct drm_encoder *encoder,
 
 static void vlv_write_infoframe(struct drm_encoder *encoder,
                                enum hdmi_infoframe_type type,
-                               const uint8_t *frame, ssize_t len)
+                               const void *frame, ssize_t len)
 {
-       uint32_t *data = (uint32_t *)frame;
+       const uint32_t *data = frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
@@ -284,9 +284,9 @@ static void vlv_write_infoframe(struct drm_encoder *encoder,
 
 static void hsw_write_infoframe(struct drm_encoder *encoder,
                                enum hdmi_infoframe_type type,
-                               const uint8_t *frame, ssize_t len)
+                               const void *frame, ssize_t len)
 {
-       uint32_t *data = (uint32_t *)frame;
+       const uint32_t *data = frame;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 2abeab0..95bdfb3 100644 (file)
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -952,7 +952,7 @@ static void intel_sdvo_dump_hdmi_buf(struct intel_sdvo *intel_sdvo)
 
 static bool intel_sdvo_write_infoframe(struct intel_sdvo *intel_sdvo,
                                       unsigned if_index, uint8_t tx_rate,
-                                      uint8_t *data, unsigned length)
+                                      const uint8_t *data, unsigned length)
 {
        uint8_t set_buf_index[2] = { if_index, 0 };
        uint8_t hbuf_size, tmp[8];