drm: Nuke fb->bits_per_pixel

Replace uses of fb->bits_per_pixel with fb->format->cpp[0]*8.
Less duplicated information is a good thing.

Note that I didn't put parens around the cpp*8 in the below cocci script,
on account of not wanting spurious parens all over the place. Instead I
did the unsafe way, and tried to look over the entire diff to spot if
any dangerous expressions were produced. I didn't see any.

There are some cases where previously the code did X*bpp/8, so the
division happened after the multiplication. Those are now just X*cpp
so the division effectively happens before the multiplication,
but that is perfectly fine since bpp is always a multiple of 8.

@@
struct drm_framebuffer *FB;
expression E;
@@
 drm_helper_mode_fill_fb_struct(...) {
	...
-	FB->bits_per_pixel = E;
	...
 }

@@
struct drm_framebuffer *FB;
expression E;
@@
 i9xx_get_initial_plane_config(...) {
	...
-	FB->bits_per_pixel = E;
	...
 }

@@
struct drm_framebuffer *FB;
expression E;
@@
 ironlake_get_initial_plane_config(...) {
	...
-	FB->bits_per_pixel = E;
	...
 }

@@
struct drm_framebuffer *FB;
expression E;
@@
 skylake_get_initial_plane_config(...) {
	...
-	FB->bits_per_pixel = E;
	...
 }

@@
struct drm_framebuffer FB;
expression E;
@@
(
- E * FB.bits_per_pixel / 8
+ E * FB.format->cpp[0]
|
- FB.bits_per_pixel / 8
+ FB.format->cpp[0]
|
- E * FB.bits_per_pixel >> 3
+ E * FB.format->cpp[0]
|
- FB.bits_per_pixel >> 3
+ FB.format->cpp[0]
|
- (FB.bits_per_pixel + 7) / 8
+ FB.format->cpp[0]
|
- FB.bits_per_pixel
+ FB.format->cpp[0] * 8
|
- FB.format->cpp[0] * 8 != 8
+ FB.format->cpp[0] != 1
)

@@
struct drm_framebuffer *FB;
expression E;
@@
(
- E * FB->bits_per_pixel / 8
+ E * FB->format->cpp[0]
|
- FB->bits_per_pixel / 8
+ FB->format->cpp[0]
|
- E * FB->bits_per_pixel >> 3
+ E * FB->format->cpp[0]
|
- FB->bits_per_pixel >> 3
+ FB->format->cpp[0]
|
- (FB->bits_per_pixel + 7) / 8
+ FB->format->cpp[0]
|
- FB->bits_per_pixel
+ FB->format->cpp[0] * 8
|
- FB->format->cpp[0] * 8 != 8
+ FB->format->cpp[0] != 1
)

@@
struct drm_plane_state *state;
expression E;
@@
(
- E * state->fb->bits_per_pixel / 8
+ E * state->fb->format->cpp[0]
|
- state->fb->bits_per_pixel / 8
+ state->fb->format->cpp[0]
|
- E * state->fb->bits_per_pixel >> 3
+ E * state->fb->format->cpp[0]
|
- state->fb->bits_per_pixel >> 3
+ state->fb->format->cpp[0]
|
- (state->fb->bits_per_pixel + 7) / 8
+ state->fb->format->cpp[0]
|
- state->fb->bits_per_pixel
+ state->fb->format->cpp[0] * 8
|
- state->fb->format->cpp[0] * 8 != 8
+ state->fb->format->cpp[0] != 1
)

@@
@@
- (8 * 8)
+ 8 * 8

@@
struct drm_framebuffer FB;
@@
- (FB.format->cpp[0])
+ FB.format->cpp[0]

@@
struct drm_framebuffer *FB;
@@
- (FB->format->cpp[0])
+ FB->format->cpp[0]

@@
@@
 struct drm_framebuffer {
	 ...
-	 int bits_per_pixel;
	 ...
 };

v2: Clean up the 'cpp*8 != 8' and '(8 * 8)' cases (Laurent)
v3: Adjusted the semantic patch a bit and regenerated due to code
    changes

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Link: http://patchwork.freedesktop.org/patch/msgid/1481751140-18352-1-git-send-email-ville.syrjala@linux.intel.com

1 files changed, 7 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index 31c03e32a6b5..ce6cb6666212 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -402,7 +402,7 @@ int radeon_crtc_do_set_base(struct drm_crtc *crtc,
 		target_fb = crtc->primary->fb;
 	}
 
-	switch (target_fb->bits_per_pixel) {
+	switch (target_fb->format->cpp[0] * 8) {
 	case 8:
 		format = 2;
 		break;
@@ -476,9 +476,9 @@ retry:
 
 	crtc_offset_cntl = 0;
 
-	pitch_pixels = target_fb->pitches[0] / (target_fb->bits_per_pixel / 8);
-	crtc_pitch = DIV_ROUND_UP(pitch_pixels * target_fb->bits_per_pixel,
-				  target_fb->bits_per_pixel * 8);
+	pitch_pixels = target_fb->pitches[0] / target_fb->format->cpp[0];
+	crtc_pitch = DIV_ROUND_UP(pitch_pixels * target_fb->format->cpp[0] * 8,
+				  target_fb->format->cpp[0] * 8 * 8);
 	crtc_pitch |= crtc_pitch << 16;
 
 	crtc_offset_cntl |= RADEON_CRTC_GUI_TRIG_OFFSET_LEFT_EN;
@@ -503,14 +503,14 @@ retry:
 			crtc_tile_x0_y0 = x | (y << 16);
 			base &= ~0x7ff;
 		} else {
-			int byteshift = target_fb->bits_per_pixel >> 4;
+			int byteshift = target_fb->format->cpp[0] * 8 >> 4;
 			int tile_addr = (((y >> 3) * pitch_pixels +  x) >> (8 - byteshift)) << 11;
 			base += tile_addr + ((x << byteshift) % 256) + ((y % 8) << 8);
 			crtc_offset_cntl |= (y % 16);
 		}
 	} else {
 		int offset = y * pitch_pixels + x;
-		switch (target_fb->bits_per_pixel) {
+		switch (target_fb->format->cpp[0] * 8) {
 		case 8:
 			offset *= 1;
 			break;
@@ -602,7 +602,7 @@ static bool radeon_set_crtc_timing(struct drm_crtc *crtc, struct drm_display_mod
 		}
 	}
 
-	switch (fb->bits_per_pixel) {
+	switch (fb->format->cpp[0] * 8) {
 	case 8:
 		format = 2;
 		break;